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Woschko D, Yilmaz S, Jansen C, Spieß A, Oestreich R, Matemb Ma Ntep TJ, Janiak C. Enhanced sorption in an indium-acetylenedicarboxylate metal-organic framework with unexpected chains of cis-μ-OH-connected {InO 6} octahedra. Dalton Trans 2023; 52:977-989. [PMID: 36601863 DOI: 10.1039/d2dt03719j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Single crystals of the new metal-organic framework (MOF) In-adc (HHUD-4) were obtained through the reaction of linear acetylenedicarboxylic acid (H2adc) with In(NO3)3·xH2O as a racemic conglomerate in the chiral tetragonal space groups P4322 and P4122. Fundamentally different from other MOFs with linear linkers and trans-μ-OH-connected infinite {MO6} secondary building units as in the MIL-53-type, the linear adc2- linker leads to the formation of cis-μ-OH connected {InO6} polyhedra, which have otherwise only been found before for V-shaped ligands, as in CAU-10-H. A far-reaching implication of this finding is the possibility that trans-μ-OH/straight MIL-53-type MOFs will have polymorphs of CAU-10-H cis-μ-OH/helical topology and vice versa. HHUD-4 is a microporous MOF with a BET surface area of up to 940 m2 g-1 and a micropore volume of up to 0.39 cm3 g-1. Additionally, HHUD-4 features good adsorption uptakes of 3.77 mmol g-1 for CO2 and 1.25 mmol g-1 for CH4 at 273 K and 1 bar, respectively, and a high isosteric heat of adsorption of 11.4 kJ mol-1 for H2 with a maximum uptake of 6.36 mmol g-1 at 77 K and 1 bar. Vapor sorption experiments for water and volatile organic compounds (VOCs) such as benzene, cyclohexane and n-hexane yielded uptake values of 135, 269, 116 and 205 mg g-1, respectively, at 293 K. While HHUD-4 showed unremarkable results for water uptake and low stability for water, it exhibited good stability with steep VOC uptake steps at low relative pressures and a high selectivity of 17 for benzene/cyclohexane mixtures.
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Affiliation(s)
- Dennis Woschko
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany.
| | - Süheyla Yilmaz
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany.
| | - Christian Jansen
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany.
| | - Alex Spieß
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany.
| | - Robert Oestreich
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany.
| | - Tobie J Matemb Ma Ntep
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany.
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany.
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2
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Woschko D, Millan S, Ceyran MA, Oestreich R, Janiak C. Synthesis of a Chiral 3,6T22-Zn-MOF with a T-Shaped Bifunctional Pyrazole-Isophthalate Ligand Following the Principles of the Supramolecular Building Layer Approach. Molecules 2022; 27:molecules27175374. [PMID: 36080142 PMCID: PMC9457947 DOI: 10.3390/molecules27175374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
The metal–organic framework (MOF) [Zn(Isa-az-tmpz)]·~1–1.5 DMF with the novel T-shaped bifunctional linker 5-(2-(1,3,5-trimethyl-1H-pyrazol-4-yl)azo)isophthalate (Isa-az-tmpz) was obtained as a conglomerate of crystals with varying degrees of enantiomeric excess in the chiral tetragonal space groups P43212 or P41212. A topological analysis of the compound resulted in the rare 3,6T22-topology, deviating from the expected rtl-topology, which has been found before in pyrazolate-isophthalate-functionalized MOFs using the supramolecular building layer (SBL) approach. 3,6T22-[Zn(Isa-az-tmpz)]·~1–1.5 DMF is a potentially porous, three-dimensional structure with DMF molecules included in the corrugated channels along the a and b-axis of the as synthesized material. The small trigonal cross-section of about 6 × 4 Å (considering the van der Waals surface) prevents the access of N2 and Ar under cryogenic conditions. After activation, only smaller H2 (at 87 K) and CO2 (at 195 K) are allowed for gas uptakes of 2 mmol g–1 and 5.4 mmol g–1, respectively, in the ultramicroporous material, for which a BET surface area of 496 m2·g–1 was calculated from CO2 adsorption. Thermogravimetric analysis of the compound shows a thermal stability of up to 400 °C.
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Bezpalko MW, Lorson LC, Thomas CM, Foxman BM. Cocrystals of bis(hexamethylbenzene)iron hexafluorophosphate and tetrafluoroborate with arenes: A structural study. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Amiri Rudbari H, Saadati A, Ariaeefar M, Blacque O, Correia I, Islam MK, Woschko D, Janiak C, Enamullah M. Pseudotetrahedral Zn(II)-(R or S)-dihalogen-salicylaldiminato complexes with Λ- or Δ-chirality induction at-metal. Dalton Trans 2022; 51:2385-2399. [DOI: 10.1039/d1dt04220c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of enantiopure (S or R)-N-1-(phenyl)ethyl-2,4-X1,X2-salicylaldimine (S-H or R-H; X1, X2 = dihalogen) with Zn(II)-nitrate give bis[(S or R)-N-1-(phenyl)ethyl-2,4-X1,X2-salicylaldiminato-κ2N,O]-zinc(II), (Δ-ZnS or Λ-ZnR) with Δ/Λ-chirality induction at-metal in the C2-symmetric molecules....
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5
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Valentín-Pérez Á, Rosa P, Hillard EA, Giorgi M. Chirality determination in crystals. Chirality 2021; 34:163-181. [PMID: 34766388 DOI: 10.1002/chir.23377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/26/2021] [Accepted: 09/13/2021] [Indexed: 12/26/2022]
Abstract
This tutorial review article discusses chirality determination in the solid state, both in single crystals and in crystal assemblies, with an emphasis on X-ray diffraction. The main principles of using X-ray diffraction to reliably determine absolute structure are summarized, and the complexity which can be encountered in chiral structures-kryptoracemates, scalemates, and inversion twinning-is illustrated with examples from our laboratories and the literature. We then address the problem of the bulk crystallization and discuss different techniques to determine chirality in a large assembly of crystal structures, with a special prominence given to an X-ray natural circular dichroism mapping technique that we recently reported.
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Affiliation(s)
| | - Patrick Rosa
- Univ. Bordeaux, CNRS, Bordeaux-INP, ICMCB, UMR 5026, F-33600 Pessac, Cedex, France
| | - Elizabeth A Hillard
- Univ. Bordeaux, CNRS, Bordeaux-INP, ICMCB, UMR 5026, F-33600 Pessac, Cedex, France.,CNRS, Univ. Bordeaux, CRPP, UMR 5031, Pessac, France
| | - Michel Giorgi
- Aix Marseille Univ, CNRS, Centrale Marseille, FSCM, Spectropole, Marseille, France
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6
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Górecki M, Enamullah M, Islam MA, Islam MK, Höfert SP, Woschko D, Janiak C, Pescitelli G. Synthesis and Characterization of Bis[( R or S)- N-1-(X-C 6H 4)ethyl-2-oxo-1-naphthaldiminato-κ 2N, O]-Λ/Δ-cobalt(II) (X = H, p-CH 3O, p-Br) with Symmetry- and Distance-Dependent Vibrational Circular Dichroism Enhancement and Sign Inversion. Inorg Chem 2021; 60:14116-14131. [PMID: 34477372 PMCID: PMC8456410 DOI: 10.1021/acs.inorgchem.1c01503] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The enantiopure Schiff
bases (R or S)-N-1-(X-C6H4)ethyl-2-hydroxy-1-naphthaldimine
{X = H [(R or S)-HL1], p-CH3O [(R or S)-HL2],
and p-Br [(R- or S)-HL3]} react with cobalt(II) acetate to give bis[(R or S)-N-1-(X-C6H4)ethyl-2-oxo-1-naphthaldiminato-κ2N,O]-Λ/Δ-cobalt(II) {X = H
[Λ/Δ-Co-(R or S)-L1], p-CH3O [Λ/Δ-Co-(R or S)-L2], and p-Br [Λ/Δ-Co-(R or S)-L3]} (1–3), respectively. Induced Λ and Δ chirality originates
at the metal center of the C2-symmetric
molecule in pseudotetrahedral geometry. Differential scanning calorimetry
analyses explored the thermal stability of the complexes, which undergo
reversible phase transformation from crystalline solid to isotropic
liquid phase for 1 and 3 but irreversible
phase transformation for 2. Like other cobalt(II) complexes,
compounds 1–3 exhibit a continuous
ensemble of absorption and circular dichroism bands, which span from
the UV to IR region and can be collected into a superspectrum. Infrared
vibrational circular dichroism (IR-VCD) spectra witness the coupling
between Co2+-centered low-lying electronic states and ligand-centered
vibrations. The coupling produces enhanced and almost monosignate
VCD spectra, with both effects being mode-dependent in terms of the A or B symmetry (in the C2 point group) and distance from the Co2+ core. Chiroptical superspectra of naphthaldiminatocobalt(II)
complexes 1−3 exhibit a continuous
ensemble of absorption
and circular dichroism bands from the UV to IR region, including peculiar
and almost monosignate vibrational circular dichroism (VCD) spectra
dominated by the coupling between Co2+-centered low-lying
electronic states and ligand-centered vibrations, which depend on
the normal-mode symmetry and distance from the Co2+ core
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Affiliation(s)
- Marcin Górecki
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa 56126, Italy.,Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw 01-224, Poland
| | - Mohammed Enamullah
- Department of Chemistry, Jahangirnagar University, Dhaka 1342, Bangladesh
| | | | | | - Simon-Patrick Höfert
- Institute of Inorganic Chemistry and Structural Chemistry, Heinrich-Heine-University of Düsseldorf, Düsseldorf 40225, Germany
| | - Dennis Woschko
- Institute of Inorganic Chemistry and Structural Chemistry, Heinrich-Heine-University of Düsseldorf, Düsseldorf 40225, Germany
| | - Christoph Janiak
- Institute of Inorganic Chemistry and Structural Chemistry, Heinrich-Heine-University of Düsseldorf, Düsseldorf 40225, Germany
| | - Gennaro Pescitelli
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa 56126, Italy
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7
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Enamullah M, Anwar Hossain M, Islam MK, Woschko D, Janiak C. Pseudotetrahedral copper(II)-complexes with enantiopure ( R or S)-2-(((aryl)ethylimino)ethyl)phenolate Schiff base ligands. Dalton Trans 2021; 50:9236-9249. [PMID: 34128030 DOI: 10.1039/d1dt01671g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Condensation of 2-hydroxy-benzophenone (HL') with (R or S)-(Ar)ethylamine yields the enantiopure Schiff bases (S or R)-2-((E)-1-(1-(Ar)ethylimino)ethyl)phenol {Ar = C6H5 (S- or R-HL1), p-CH3OC6H4 (S- or R-HL2)}. These Schiff bases react with copper(ii) acetate under reflux to give green microcrystals of bis[(R or S)-2-((E)-1-(1-(Ar)ethylimino)ethyl)phenolato-κ2N,O]-Λ/Δ-copper(ii), {Ar = C6H5 (Λ/Δ-Cu-R- or S-L1), p-CH3OC6H4 (Λ/Δ-Cu-R- or S-L2)} with induction of Λ/Δ-chirality at-metal. The presence of Schiff base ligands in the paramagnetic green microcrystals is confirmed by decomplexation reaction with NaCN via reduction of Cu(ii) to Cu(i) in DMSO-d6 solution. Crystallization attempts of the green microcrystalline Schiff-base Cu complexes provide deep-green block-shaped crystals of an about equal admixture of bis[2-oxo-benzophenonato-κ2O,O']-copper(ii), (CuL'2) and bis[2-(imino(phenyl)methyl)phenolato-κ2N,O]copper(ii), (CuL''2) via in situ hydrolysis of the coordinated Schiff base ligands back to 2-hydroxy-benzophenone (HL') and to 2-(imino(phenyl)methyl)phenol (HL''), which in-turn bind with the copper(ii) ion. Powder X-ray diffraction (PXRD) patterns of R-HL1 and Cu-R-L1 allowed their structure determinations using the program Expo-2014 followed by Rietveld refinement. The Cu structures refined to four-coordinated Λ/Δ-copper(ii)-complexes by the two phenolate-oxygen and two imine-nitrogen atoms from two Schiff base ligands in a pseudotetrahedral geometry. DFT optimized structures (at gas-phase) reveal the Δ-Cu-S-L1 or Λ-Cu-R-L1 diastereomer as slightly more stable than the corresponding Λ-Cu-S-L1 or Δ-Cu-R-L1 by ca. 7.60 kcal mol-1, resulting from diastereoselectively induced Λ vs. Δ-chirality at-metal. Electronic circular dichroism (ECD) spectra display mirror-image relationships and comparisons of experimental and simulated ECD spectra by TDDFT suggest an excess of the Δ-Cu-S-L1 or Λ-Cu-R-L1 diastereomer in solution. The cyclic voltammograms demonstrate two one electron charge transfer processes for Cu2+/Cu+ and Cu+/Cu0 couples in acetonitrile, respectively.
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Affiliation(s)
- Mohammed Enamullah
- Department of Chemistry, Jahangirnagar University, Dhaka-1342, Bangladesh.
| | | | | | - Dennis Woschko
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, Universitätsstr. 1, D-40225 Düsseldorf, Germany.
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, Universitätsstr. 1, D-40225 Düsseldorf, Germany.
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8
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Synthesis and high antiproliferative activity of dehydroabietylamine pyridine derivatives in vitro and in vivo. Biochem J 2020; 477:2383-2399. [PMID: 32497169 DOI: 10.1042/bcj20200337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/01/2020] [Accepted: 06/04/2020] [Indexed: 11/17/2022]
Abstract
Several bioactive dehydroabietylamine Schiff-bases (L1-L4), amides (L5-L11) and complex CuL3(NO3)2, Cu(L5)3, Co(L6)2Cl2 had been synthesized successfully for developing more efficient but lower toxic antiproliferative compounds. Their antiproliferative activities to Hela (cervix), HepG2 (liver), MCF-7 (breast), A549 (lung) and HUVEC (umbilical vein, normal cell) were investigated in vitro. The toxicity of all compounds was less than dehydroabietylamine (L0). For HepG2 cells, L1, L2 and L3 had higher anti-HepG2 activity, especially L1 (0.52 µM) had highest anti-HepG2 activity but low toxicity. For MCF-7 cells, L1, L2, L3 and L4 had higher anti-MCF-7 activity, especially L3(0.49 µM) had highest anti-MCF-7 activity but low toxicity. For A549 cells, L2 and L3 had higher anti-A549 activity. Furthermore, L1 and L3 may be the great promise antiproliferative drugs with nontoxic side effects, due to the high anti-HepG2 and anti-MCF-7 inhibition rate in vivo, 65% and 61%, respectively. L1, L2 and L3 could induce apoptosis through intercalating into DNA.
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Abstract
Howard Flack was a driving force in the development of modern crystallography. Today “the Flack parameter” has entered into the common parlance of crystallography but his influence was far wider. This article provides an overview of his scientific output and a full bibliography.
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Amaro Hernández AG, Rodríguez Tzompantzi T, Dávila García Á, Meza-León RL, Bernès S. Ethyl (3 S)-3-[(3a R,5 R,6 S,6a R)-6-hydroxy-2,2-dimethyltetrahydrofuro[4,5- d][1,3]dioxol-5-yl]-3-{(3 S)-3-[(3a R,5 R,6 S,6a R)-6-hydroxy-2,2-dimethyltetrahydrofuro[4,5- d][1,3]dioxol-5-yl]-5-oxoisoxazolidin-2-yl}propanoate chloroform monosolvate. IUCRDATA 2020; 5:x200788. [PMID: 36340615 PMCID: PMC9462232 DOI: 10.1107/s2414314620007889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 06/10/2020] [Indexed: 12/04/2022] Open
Abstract
The Flack and Watkin 2AD plot based on 1941 acentric Friedel pairs for the title chloroform solvate shows that the observed intensity differences for Friedel opposites are dominated by random and systematic errors, erasing information about resonant scattering. The title compound, C22H33NO12·CHCl3, was obtained as a product of a double aza-Michael addition of hydroxylamine on a Chiron with a known absolute configuration. The enantiopure compound crystallized as a chloroform solvate, in space group P1, and diffraction data were collected at room temperature with Ag Kα radiation. The Flack parameter refined to x = −0.01 (16); however, the Flack and Watkin 2AD plot clearly shows that differences between Friedel opposites (the D component of the plot) do not carry any reliable information about resonant scattering of Cl atoms, and are rather dominated by random and systematic errors. The RD factor calculated using 1941 acentric Friedel pairs is RD = 0.995. On the other hand, the 2A component of the plot, related to average intensities of Friedel pairs, shows that data are of good quality (RA = 0.069). This example illustrates that while using Ag Kα radiation (λ = 0.56083 Å), scatterers heavier than Cl should be present in a chiral crystal in order to determine confidently the absolute structure of the crystal.![]()
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El-Kashef DH, Youssef FS, Hartmann R, Knedel TO, Janiak C, Lin W, Reimche I, Teusch N, Liu Z, Proksch P. Azaphilones from the Red Sea Fungus Aspergillus falconensis. Mar Drugs 2020; 18:md18040204. [PMID: 32290208 PMCID: PMC7231052 DOI: 10.3390/md18040204] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/05/2020] [Accepted: 04/05/2020] [Indexed: 11/17/2022] Open
Abstract
The marine-derived fungus Aspergillus falconensis, isolated from sediment collected from the Canyon at Dahab, Red Sea, yielded two new chlorinated azaphilones, falconensins O and P (1 and 2) in addition to four known azaphilone derivatives (3−6) following fermentation of the fungus on solid rice medium containing 3.5% NaCl. Replacing NaCl with 3.5% NaBr induced accumulation of three additional new azaphilones, falconensins Q−S (7−9) including two brominated derivatives (7 and 8) together with three known analogues (10−12). The structures of the new compounds were elucidated by 1D and 2D NMR spectroscopy and HRESIMS data as well as by comparison with the literature. The absolute configuration of the azaphilone derivatives was established based on single-crystal X-ray diffraction analysis of 5, comparison of NMR data and optical rotations as well as on biogenetic considerations. Compounds 1, 3−9, and 11 showed NF-κB inhibitory activity against the triple negative breast cancer cell line MDA-MB-231 with IC50 values ranging from 11.9 to 72.0 µM.
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Affiliation(s)
- Dina H. El-Kashef
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany; (D.H.E.-K.); (F.S.Y.)
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt
| | - Fadia S. Youssef
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany; (D.H.E.-K.); (F.S.Y.)
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Abbassia, 11566 Cairo, Egypt
| | - Rudolf Hartmann
- Institute of Complex Systems: Strukturbiochemie, Forschungszentrum Jülich GmbH, ICS-6, 52425 Jülich, Germany;
| | - Tim-Oliver Knedel
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany; (T.-O.K.); (C.J.)
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany; (T.-O.K.); (C.J.)
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China;
| | - Irene Reimche
- Department of Biomedical Sciences, Institute of Health Research and Education, University of Osnabrück, 49074 Osnabrück, Germany; (I.R.); (N.T.)
| | - Nicole Teusch
- Department of Biomedical Sciences, Institute of Health Research and Education, University of Osnabrück, 49074 Osnabrück, Germany; (I.R.); (N.T.)
| | - Zhen Liu
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany; (D.H.E.-K.); (F.S.Y.)
- Correspondence: (Z.L.); (P.P.); Tel.: +49-211-81-14163 (Z.L. & P.P.)
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany; (D.H.E.-K.); (F.S.Y.)
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
- Correspondence: (Z.L.); (P.P.); Tel.: +49-211-81-14163 (Z.L. & P.P.)
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Kordestani N, Amiri Rudbari H, Bruno G, Rosario S, Braun JD, Herbert DE, Blacque O, Correia I, Zaman MAM, Bindu MM, Janiak C, Enamullah M. Solid-state to solution helicity inversion of pseudotetrahedral chiral copper(ii) complexes with 2,4-dihalo-salicylaldiminate ligands. Dalton Trans 2020; 49:8247-8264. [DOI: 10.1039/d0dt01649g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Steric constraints by the halogen substituents show an efficient control of stereochemical behaviours of the complexes.
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Affiliation(s)
| | | | - Giuseppe Bruno
- Department of Chemical
- Biological
- Pharmaceutical and Environmental Sciences
- University of Messina
- I-98166 Messina
| | - Scopelliti Rosario
- Institut des Sciences et Ingénierie Chimiques
- École Polytechnique Fédérale de Lausanne (EPFL)
- CH-1015 Lausanne
- Switzerland
| | - Jason D. Braun
- Department of Chemistry
- University of Manitoba
- Winnipeg
- Canada
| | | | - Olivier Blacque
- Department of Chemistry
- University of Zurich
- Zurich
- Switzerland
| | - Isabel Correia
- Centro de Química Estrutural
- Departamento de Engenharia Química
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
| | | | | | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie
- Universität Düsseldorf
- D-40204 Düsseldorf
- Germany
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Yang YL, Li W, Wang H, Yang L, Yuan JZ, Cai CH, Chen HQ, Dong WH, Ding XP, Jiang B, Mándi A, Kurtán T, Mei WL, Dai HF. New tricyclic prezizaane sesquiterpenoids from agarwood. Fitoterapia 2019; 138:104301. [DOI: 10.1016/j.fitote.2019.104301] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 08/10/2019] [Accepted: 08/12/2019] [Indexed: 02/07/2023]
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14
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Dumitru F, van der Lee A, Barboiu M. Chiral superstructures from homochiral Zn 2+ , Co 2+ , Fe 2+ -2,6-bis (aryl ethylimine)pyridine complexes. Chirality 2019; 31:763-775. [PMID: 31392782 DOI: 10.1002/chir.23115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/15/2019] [Accepted: 07/06/2019] [Indexed: 11/07/2022]
Abstract
We report the hierarchical supramolecular organization of metallosupramolecular homochiral complexes 1-Λ-(S,S,S,S)-M2+ /1-∆-(R,R,R,R)-M2+ and 2- Λ-(S,S,S,S)-M2+ /2-∆- (R,R,R,R)-M2+ of M2+ = Co2+ , Fe2+ , Zn2+ metal ions with chiral pseudo-terpyridine-type ligands: 1-(S,S) or 1-(R,R) = 2,6-bis (naphthyl ethylimine)pyridine and 2-(S,S) or 2-(R,R) = 2,6-bis (phenyl-ethylimine)pyridine. Circular dichroism measurements in solution were used to confirm the enantiomeric nature of all twelve complexes. For crystal structures of 1- Λ- (S,S,S,S)-M2+ or 1-∆- (R,R,R,R)-M2+ complexes, absolute configurations {∆ (or P), Λ (or M)} were confirmed by refinement of the Flack parameter x: -0.007 ≤ x ≤ 0.11 for the single crystals of 1-Λ-(S,S,S,S)-M2+ /1-∆- (R,R,R,R)-M2+ , 2- Λ- (S,S,S,S)-Fe2+ , and 2-∆- (R,R,R,R)-Co2+ .
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Affiliation(s)
- Florina Dumitru
- Institut Européen des Membranes, UMR-CNRS 5635, Université Montpellier, ENSCM Place eugene Bataillon CC047, Montpellier, France.,Faculty of Applied Chemistry and Materials Science, Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University Politehnica of Bucharest, Bucharest, Romania
| | - Arie van der Lee
- Institut Européen des Membranes, UMR-CNRS 5635, Université Montpellier, ENSCM Place eugene Bataillon CC047, Montpellier, France
| | - Mihail Barboiu
- Institut Européen des Membranes, UMR-CNRS 5635, Université Montpellier, ENSCM Place eugene Bataillon CC047, Montpellier, France
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15
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Zhao F, Lu W, Su F, Xu L, Jiang D, Sun X, Shi J, Zhou M, Lin F, Cao F. Synthesis and potential antineoplastic activity of dehydroabietylamine imidazole derivatives. MEDCHEMCOMM 2018; 9:2091-2099. [PMID: 30746067 PMCID: PMC6336084 DOI: 10.1039/c8md00487k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 10/24/2018] [Indexed: 11/21/2022]
Abstract
To seek more efficient and lower toxicity anticancer compounds, several imidazole combining dehydroabietylamine derivatives including organic salts (L 1 -L 2 ) and amides (L 3 -L 5 ) were synthesized. Their antineoplastic activity against HeLa (cervix), MCF-7 (breast), A549 (lung) and HepG2 (liver) cells and HUVECs (umbilical vein, normal cells) in vitro were evaluated by MTT assay. The results unequivocally showed that nearly all compounds had better antineoplastic activity and lower toxicity than dehydroabietylamine (L 0 ). For MCF-7 cells, L 2 (0.75 μM) and L 5 (2.17 μM) had higher anti-MCF-7 activity than L 0 and DOX. For A549 cells, L 1 (1.85 μM) and L 2 (4.37 μM) had higher anti-A549 activity than L 0 ; in particular, the IC50 value of L 1 was much lower than that of DOX. Among these investigated compounds, L 2 and L 5 had lower IC50 values (0.75 μM and 2.17 μM) against MCF-7 cells and lower toxicity, which suggested that they may be potential future anticancer drugs. In addition, L 1 and L 2 could suppress cancer cell proliferation by inducing apoptosis. L 1 -L 5 could bind with DNA through intercalation.
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Affiliation(s)
- Fengyi Zhao
- College of Forestry , Nanjing Forestry University , Nanjing 210037 , PR China .
- College of Science , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Wen Lu
- College of Science , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Fan Su
- Advanced Analysis and Testing Centre , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Li Xu
- College of Science , Nanjing Forestry University , Nanjing 210037 , PR China
- Co-Innovation Centre for Sustainable Forestry in Southern China , Nanjing Forestry University , China
- Sate Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin 541001 , PR China
| | - Dong Jiang
- College of Science , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Xu Sun
- Advanced Analysis and Testing Centre , Nanjing Forestry University , Nanjing 210037 , PR China
- College of Information Science and Technology , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Jiuzhou Shi
- College of Science , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Mengyi Zhou
- Advanced Analysis and Testing Centre , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Feng Lin
- Advanced Analysis and Testing Centre , Nanjing Forestry University , Nanjing 210037 , PR China
| | - Fuliang Cao
- College of Forestry , Nanjing Forestry University , Nanjing 210037 , PR China .
- Co-Innovation Centre for Sustainable Forestry in Southern China , Nanjing Forestry University , China
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16
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Bejan D, Bahrin LG, Shova S, Sardaru M, Clima L, Nicolescu A, Marangoci N, Lozan V, Janiak C. Spontaneous resolution of non-centrosymmetric coordination polymers of zinc(II) with achiral imidazole-biphenyl-carboxylate ligands. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.05.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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17
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Voda I, Makhloufi G, Druta V, Lozan V, Shova S, Bourosh P, Kravtsov V, Janiak C. Mixed-ligand coordination compounds based on the rigid 4,4′-bis(1-imidazolyl)biphenyl and pyridinedicarboxylate ligands. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.06.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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18
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Naim A, Bouhadja Y, Cortijo M, Duverger-Nédellec E, Flack HD, Freysz E, Guionneau P, Iazzolino A, Ould Hamouda A, Rosa P, Stefańczyk O, Valentín-Pérez Á, Zeggar M. Design and Study of Structural Linear and Nonlinear Optical Properties of Chiral [Fe(phen)3]2+ Complexes. Inorg Chem 2018; 57:14501-14512. [DOI: 10.1021/acs.inorgchem.8b01089] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ahmad Naim
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
| | - Yacine Bouhadja
- Department of Chemistry, University of Annaba, BP 12-23200 Sidi-Ammar, Algérie
| | - Miguel Cortijo
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
- CRPP, CNRS, Université de Bordeaux, UMR 5031, F-33600 Pessac, France
| | | | - Howard D. Flack
- Chimie Minérale, Analytique et Appliquée, Sciences II, Université de Genève, 30, Quai Ernest-Ansermet CH-1211 Geneva Switzerland
| | - Eric Freysz
- LOMA, UMR CNRS 5798, 351 Cours de la Libération, FR-33405 Talence Cedex, France
| | | | - Antonio Iazzolino
- LOMA, UMR CNRS 5798, 351 Cours de la Libération, FR-33405 Talence Cedex, France
| | - Amine Ould Hamouda
- LOMA, UMR CNRS 5798, 351 Cours de la Libération, FR-33405 Talence Cedex, France
| | - Patrick Rosa
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
| | - Olaf Stefańczyk
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
| | - Ángela Valentín-Pérez
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
- CRPP, CNRS, Université de Bordeaux, UMR 5031, F-33600 Pessac, France
| | - Mehdi Zeggar
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
- Department of Chemistry, University of Annaba, BP 12-23200 Sidi-Ammar, Algérie
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19
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Glomb S, Makhloufi G, Gruber I, Janiak C. Urea-based flexible dicarboxylate linkers for three-dimensional metal-organic frameworks. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Yu X, Zhang Q, Tian L, Guo Z, Liu C, Chen J, Ebrahim W, Liu Z, Proksch P, Zou K. Germacrane-Type Sesquiterpenoids with Antiproliferative Activities from Eupatorium chinense. JOURNAL OF NATURAL PRODUCTS 2018; 81:85-91. [PMID: 29280632 DOI: 10.1021/acs.jnatprod.7b00693] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ten new germacrane-type sesquiterpenoids (1-10) were isolated from a whole plant extract of Eupatorium chinense. The structures were elucidated by analysis of their NMR and MS data as well as by comparison with literature values. The absolute configuration of eupachinsin A (1) was determined by single-crystal X-ray diffraction analysis. Compounds 3 and 4 exhibited cytotoxicity against a human breast cancer cell line (MDA-MB-231), with IC50 values of 0.8 and 3.4 μM, respectively. In addition, compounds 3-5 showed cytotoxicity against the human hepatocellular carcinoma cell line (HepG2), with IC50 values ranging from 3.6 to 7.6 μM.
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Affiliation(s)
- Xiaoqin Yu
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University , Yichang 443002, People's Republic of China
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf , 40225 Duesseldorf, Germany
| | - Qingqing Zhang
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University , Yichang 443002, People's Republic of China
| | - Li Tian
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University , Yichang 443002, People's Republic of China
| | - Zhiyong Guo
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University , Yichang 443002, People's Republic of China
| | - Chengxiong Liu
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University , Yichang 443002, People's Republic of China
| | - Jianfeng Chen
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University , Yichang 443002, People's Republic of China
| | - Weaam Ebrahim
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf , 40225 Duesseldorf, Germany
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University , Mansoura 35516, Egypt
| | - Zhen Liu
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf , 40225 Duesseldorf, Germany
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Duesseldorf , 40225 Duesseldorf, Germany
| | - Kun Zou
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University , Yichang 443002, People's Republic of China
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21
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Enamullah M, Vasylyeva V, Quddus MA, Islam MK, Höfert SP, Janiak C. Spontaneous resolution of a Δ/Λ-chiral-at-metal pseudo-tetrahedral Schiff-base zinc complex to a racemic conglomerate with C–H⋯O organized 41- and 43-helices. CrystEngComm 2018. [DOI: 10.1039/c8ce00839f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Weak supramolecular interactions can be decisive!
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Affiliation(s)
| | - Vera Vasylyeva
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | | | | | - Simon-Patrick Höfert
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
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22
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23
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Özkaya FC, Ebrahim W, Klopotowski M, Liu Z, Janiak C, Proksch P. Isolation and X-ray structure analysis of citreohybridonol from marine-derived Penicillium atrovenetum. Nat Prod Res 2017; 32:840-843. [DOI: 10.1080/14786419.2017.1311893] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ferhat Can Özkaya
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine University, Düsseldorf, Germany
- Faculty of Fisheries, İzmir Katip Çelebi University, İzmir, Turkey
| | - Weaam Ebrahim
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine University, Düsseldorf, Germany
- Faculty of Pharmacy, Department of Pharmacognosy, Mansoura University, Mansoura, Egypt
| | - Maximilian Klopotowski
- Institute of Inorganic and Structural Chemistry, Heinrich-Heine University, Düsseldorf, Germany
| | - Zhen Liu
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine University, Düsseldorf, Germany
| | - Christoph Janiak
- Institute of Inorganic and Structural Chemistry, Heinrich-Heine University, Düsseldorf, Germany
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine University, Düsseldorf, Germany
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24
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25
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Cabrera KD, Rowland AT, Szarko JM, Diaconescu PL, Bezpalko MW, Kassel WS, Nataro C. Monodentate phosphine substitution in [Pd(κ3-dppf)(PR3)][BF4]2 (dppf = 1,1′-bis(diphenylphosphino)ferrocene) compounds. Dalton Trans 2017; 46:5702-5710. [DOI: 10.1039/c6dt04921d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The synthesis and dissociative monodentate phosphine substitution of [Pd(κ3-dppf)(P(p-C6H4R)3)][BF4]2 compounds is presented. DFT calculations further examines the nature of the Fe–Pd interaction of the κ3-dppf ligand.
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Affiliation(s)
| | | | - J. M. Szarko
- Department of Chemistry
- Lafayette College
- Easton
- USA
| | - P. L. Diaconescu
- Department of Chemistry & Biochemistry
- University of California
- Los Angeles
- USA
| | - M. W. Bezpalko
- Department of Chemistry & Biochemistry
- Villanova University
- Villanova
- USA
| | - W. S. Kassel
- Department of Chemistry & Biochemistry
- Villanova University
- Villanova
- USA
| | - C. Nataro
- Department of Chemistry
- Lafayette College
- Easton
- USA
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26
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Cheng M, Wang Q, Bao J, Wu Y, Sun L, Yang B, Liu Q. Synthesis and structural diversity of d10 metal coordination polymers constructed from new semi-rigid bis(3-methyl-1H-pyrazole-4-carboxylic acid)alkane ligands. NEW J CHEM 2017. [DOI: 10.1039/c7nj00835j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three isomeric ligands, and four d10 metal CPs were synthesized, varying from 1D to 2D, together with achirality to chirality variation.
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Affiliation(s)
- Meiling Cheng
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Qinghua Wang
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jinting Bao
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Yujuan Wu
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Lin Sun
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Bingxin Yang
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Qi Liu
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
- State Key Laboratory of Coordination Chemistry
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27
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Voda I, Makhloufi G, Lozan V, Shova S, Heering C, Janiak C. Mixed-ligand cobalt, nickel and zinc coordination polymers based on flexible 1,4-bis((1H-imidazol-1-yl)methyl)benzene and rigid carboxylate linkers. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Watkin DJ, Cooper RI. Why direct and post-refinement determinations of absolute structure may give different results. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2016; 72:661-683. [PMID: 27698307 DOI: 10.1107/s2052520616012890] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 08/09/2016] [Indexed: 06/06/2023]
Abstract
Direct determination of the Flack parameter as part of the structure refinement procedure usually gives different, though similar, values to post-refinement methods. The source of this discrepancy has been probed by analysing a range of data sets taken from the recent literature. Most significantly, it was observed that the directly refined Flack (x) parameter and its standard uncertainty are usually not much influenced by changes in the refinement weighting schemes, but if they are then there are probably problems with the data or model. Post-refinement analyses give Flack parameters strongly influenced by the choice of weights. Weights derived from those used in the main least squares lead to post-refinement estimates of the Flack parameters and their standard uncertainties very similar to those obtained by direct refinement. Weights derived from the variances of the observed structure amplitudes are more appropriate and often yield post-refinement Flack parameters similar to those from direct refinement, but always with lower standard uncertainties. Substantial disagreement between direct and post-refinement determinations are strongly indicative of problems with the data, which may be difficult to identify. Examples drawn from 28 structure determinations are provided showing a range of different underlying problems. It seems likely that post-refinement methods taking into account the slope of the normal probability plot are currently the most robust estimators of absolute structure and should be reported along with the directly refined values.
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Affiliation(s)
- David John Watkin
- Chemical Crystallography Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, Oxfordshire OX1 3TA, England
| | - Richard Ian Cooper
- Chemical Crystallography Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, Oxfordshire OX1 3TA, England
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29
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Trapp O, Zawatzky K. Synthesis of Cryptochiral (R,R)-2,3-Dideuterooxirane as Stereochemical Reference Compound and Chemical Correlation with D-(+)-Glyceraldehyde. Isr J Chem 2016. [DOI: 10.1002/ijch.201600111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Oliver Trapp
- Ludwig-Maximilians-Universität München; Department Chemie; Butenandtstr. 5-13 81377 München Germany
- Max-Planck-Institut für Astronomie; Königstuhl 17 69117 Heidelberg Germany
| | - Kerstin Zawatzky
- Merck Research Laboratories; Department of Process & Analytical Chemistry; Rahway, New Jersey USA
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30
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Liu S, Dai H, Makhloufi G, Heering C, Janiak C, Hartmann R, Mándi A, Kurtán T, Müller WEG, Kassack MU, Lin W, Liu Z, Proksch P. Cytotoxic 14-Membered Macrolides from a Mangrove-Derived Endophytic Fungus, Pestalotiopsis microspora. JOURNAL OF NATURAL PRODUCTS 2016; 79:2332-2340. [PMID: 27556865 DOI: 10.1021/acs.jnatprod.6b00473] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Seven new 14-membered macrolides, pestalotioprolides C (2), D-H (4-8), and 7-O-methylnigrosporolide (3), together with four known analogues, pestalotioprolide B (1), seiricuprolide (9), nigrosporolide (10), and 4,7-dihydroxy-13-tetradeca-2,5,8-trienolide (11), were isolated from the mangrove-derived endophytic fungus Pestalotiopsis microspora. Their structures were elucidated by analysis of NMR and MS data and by comparison with literature data. Single-crystal X-ray diffraction analysis was used to confirm the absolute configurations of 1, 2, and 10, while Mosher's method and the TDDFT-ECD approach were applied to determine the absolute configurations of 5 and 6. Compounds 3-6 showed significant cytotoxicity against the murine lymphoma cell line L5178Y with IC50 values of 0.7, 5.6, 3.4, and 3.9 μM, respectively, while compound 5 showed potent activity against the human ovarian cancer cell line A2780 with an IC50 value of 1.2 μM. Structure-activity relationships are discussed. Coculture of P. microspora with Streptomyces lividans caused a roughly 10-fold enhanced accumulation of compounds 5 and 6 compared to axenic fungal control.
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Affiliation(s)
| | - Haofu Dai
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences , Haikou 571101, China
| | | | | | | | - Rudolf Hartmann
- Institute of Complex Systems: Strukturbiochemie, Forschungszentrum Juelich , Wilhelm-Johnen-Straße, 52428 Juelich, Germany
| | - Attila Mándi
- Department of Organic Chemistry, University of Debrecen , P.O. Box 400, H-4002 Debrecen, Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen , P.O. Box 400, H-4002 Debrecen, Hungary
| | - Werner E G Müller
- Institute of Physiological Chemistry, Universitätsmedizin der Johannes Gutenberg-Universität Mainz , Duesbergweg 6, 55128 Mainz, Germany
| | | | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University , Beijing 100191, China
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31
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Tahli A, Chamayou AC, Köc Ü, Brückner R, Elshaarawy RF, Heering C, Janiak C. Homochiral zinc benzene-1,3,5-tricarboxylate coordination networks with a chiral nitrogen ligand or template: Spontaneous resolution of a twofold interpenetrated 2D sql (4,4) network and formation of enantiopure 3D sra (SrAl2) networks. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.05.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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A new cyclohexapeptide, penitropeptide and a new polyketide, penitropone from the endophytic fungus Penicillium tropicum. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Enamullah M, Makhloufi G, Ahmed R, Joy BA, Islam MA, Padula D, Hunter H, Pescitelli G, Janiak C. Synthesis, X-ray, and Spectroscopic Study of Dissymmetric Tetrahedral Zinc(II) Complexes from Chiral Schiff Base Naphthaldiminate Ligands with Apparent Exception to the ECD Exciton Chirality. Inorg Chem 2016; 55:6449-64. [DOI: 10.1021/acs.inorgchem.6b00403] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mohammed Enamullah
- Department of Chemistry, Jahangirnagar University, Dhaka-1342, Bangladesh
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Canada
| | - Gamall Makhloufi
- Institut
für Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Rifat Ahmed
- Department of Chemistry, Jahangirnagar University, Dhaka-1342, Bangladesh
| | - Baitul Alif Joy
- Department of Chemistry, Jahangirnagar University, Dhaka-1342, Bangladesh
| | | | - Daniele Padula
- Department of Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Howard Hunter
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Canada
| | - Gennaro Pescitelli
- Department of Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Christoph Janiak
- Institut
für Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
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34
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Dyadkin V, Wright J, Pattison P, Chernyshov D. Probing structural chirality with high-energy synchrotron radiation. J Appl Crystallogr 2016. [DOI: 10.1107/s1600576716006282] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The absolute structure has been determined for MnSi with data collected using synchrotron radiation withE= 78.3 keV (0.158 Å). At this energy, the resonant scattering contribution from MnSi is very small (f′Mn= −0.0397,f′′Mn= 0.0385,f′Si = −0.0197,f′′Si= 0.0027), but the large number of observed Bijvoet differences together with a wideQrange make absolute structure determination possible. A comparison with the data collected atE= 18 keV (0.68 Å) (f′Mn= 0.2858,f′′Mn= 0.6739,f′Si= 0.0653,f′′Si= 0.0646) for the same crystal shows the correctness of the absolute structure measured at the higher energy. A similar data collection has also been done atE= 65.3 keV (0.19 Å) for a single crystal of Fe0.7Co0.3Si with known absolute structure. In all cases, the absolute structure was correctly determined by analysing the statistical distribution of the chirality measure. Statistical descriptors of the refinements, the Flack parameter and the distribution of Parsons quotients are discussed for all presented experiments.
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35
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Cooper RI, Watkin DJ, Flack HD. Absolute structure determination using CRYSTALS. Acta Crystallogr C Struct Chem 2016; 72:261-7. [PMID: 27045174 DOI: 10.1107/s2053229616003570] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 02/19/2016] [Indexed: 11/10/2022] Open
Abstract
A study of post-refinement absolute structure determination using previously published data was carried out using the CRYSTALS software package. We show that absolute structure determination may be carried out optimally using the analyses available in CRYSTALS, and that it is not necessary to have the separate procedures absolute structure determination and no interest in absolute structure as proposed by Flack [Chimia (2014), 68, 26-30].
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Affiliation(s)
- Richard Ian Cooper
- Chemical Crystallography Laboratory, University of Oxford, 12 Mansfield Road, Oxford, Oxfordshire OX1 3TA, England
| | - David John Watkin
- Chemical Crystallography Laboratory, University of Oxford, 12 Mansfield Road, Oxford, Oxfordshire OX1 3TA, England
| | - Howard D Flack
- Chimie minérale, analytique et appliquée, University of Geneva, Geneva, Switzerland
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36
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Almássy A, Rakovský E, Malastová A, Sorádová Z, Šebesta R. Synthesis of epimer of Taniaphos ligand. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Enamullah M, Quddus MA, Hasan MR, Pescitelli G, Berardozzi R, Makhloufi G, Vasylyeva V, Janiak C. Chirality at metal and helical ligand folding in optical isomers of chiral bis(naphthaldiminato)nickel(ii) complexes. Dalton Trans 2016; 45:667-80. [DOI: 10.1039/c5dt03940a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni-Schiff base complexes combine ligand chirality, chirality at metal, and helical ligand folding in a concerted way.
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Affiliation(s)
| | | | | | | | | | - Gamall Makhloufi
- Institut für Anorganische Chemie und Strukturchemie
- Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Vera Vasylyeva
- Institut für Anorganische Chemie und Strukturchemie
- Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie
- Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
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38
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Heering C, Francis B, Nateghi B, Makhloufi G, Lüdeke S, Janiak C. Syntheses, structures and properties of group 12 element (Zn, Cd, Hg) coordination polymers with a mixed-functional phosphonate-biphenyl-carboxylate linker. CrystEngComm 2016. [DOI: 10.1039/c6ce00587j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Wang H, Dai H, Heering C, Janiak C, Lin W, Orfali RS, Müller WEG, Liu Z, Proksch P. Targeted solid phase fermentation of the soil dwelling fungus Gymnascella dankaliensis yields new brominated tyrosine-derived alkaloids. RSC Adv 2016. [DOI: 10.1039/c6ra14554j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Seven new brominated alkaloids, gymnastatins T–Y (1–6) and dankastatin D (7), together with three known analogues were isolated from the soil fungus Gymnascella dankaliensis through fermentation on solid rice mediumcontaining NaBr.
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Affiliation(s)
- Hao Wang
- Institute of Pharmaceutical Biology and Biotechnology
- Heinrich-Heine-Universität Düsseldorf
- 40225 Düsseldorf
- Germany
| | - Haofu Dai
- Key Laboratory of Biology and Genetic Resources of Tropical Crops
- Ministry of Agriculture
- Institute of Tropical Bioscience and Biotechnology
- Chinese Academy of Tropical Agricultural Sciences
- Haikou 571101
| | - Christian Heering
- Institute of Inorganic and Structural Chemistry
- Heinrich-Heine-University Düsseldorf
- 40225 Düsseldorf
- Germany
| | - Christoph Janiak
- Institute of Inorganic and Structural Chemistry
- Heinrich-Heine-University Düsseldorf
- 40225 Düsseldorf
- Germany
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- Beijing 100191
- China
| | - Raha S. Orfali
- Department of Pharmacognosy
- Faculty of Pharmacy
- King Saud University
- Riyadh
- Saudi Arabia
| | - Werner E. G. Müller
- Institut für Physiologische Chemie
- Universitätsmedizin der Johannes Gutenberg-Universität Mainz
- 55128 Mainz
- Germany
| | - Zhen Liu
- Institute of Pharmaceutical Biology and Biotechnology
- Heinrich-Heine-Universität Düsseldorf
- 40225 Düsseldorf
- Germany
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology
- Heinrich-Heine-Universität Düsseldorf
- 40225 Düsseldorf
- Germany
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40
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Zhu WG, Zheng YQ, Zhou LX, Zhu HL. Structural diversity for three Zn(II) coordination polymers from 4-nitrobenzene-1,2-dicarboxylate and bispyridyl ligand. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1105365] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Wen-Gang Zhu
- Crystal Engineering Lab, Research Center for Solid State Chemistry & Application, Ningbo University, Ningbo, PR China
| | - Yue-Qing Zheng
- Crystal Engineering Lab, Research Center for Solid State Chemistry & Application, Ningbo University, Ningbo, PR China
| | - Lin-Xia Zhou
- Crystal Engineering Lab, Research Center for Solid State Chemistry & Application, Ningbo University, Ningbo, PR China
| | - Hong-Lin Zhu
- Crystal Engineering Lab, Research Center for Solid State Chemistry & Application, Ningbo University, Ningbo, PR China
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41
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Abstract
Abstract
The paper deals with |F|2, A and D Patterson functions. The information available in the various volumes of International Tables for Crystallography is detailed. A and D are defined and the reason for their use is explained. The symmetry of these functions is explained. Calculation by symmetry-adapted Patterson functions and the Fast-Fourier algorithm are described. There are two examples. There is a very useful table presenting the relevant information.
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42
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Enamullah M, Quddus MA, Hasan MR, Pescitelli G, Berardozzi R, Reiß GJ, Janiak C. Syntheses, Spectroscopy, and Structural Analyses of Dinuclear Chiral-at-Metal μ-Aqua-tetrakis[(RorS)-N-1-(Ar)ethylsalicylaldiminato]di-Λ- or -Δ-nickel(II) Complexes. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500128] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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43
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Zhang X, Yang P, Xu L, Zhou XH, Xu X, Xu HJ, Du LT, Yang SL, Chen Y, Xu YY. Synthesis, structure, and luminescence of a coordination polymer from fumaropimaric acid and a water cluster. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1016925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Xia Zhang
- College of Science, Nanjing Forestry University, Nanjing, PR China
| | - Ping Yang
- College of Science, Nanjing Forestry University, Nanjing, PR China
| | - Li Xu
- College of Science, Nanjing Forestry University, Nanjing, PR China
- Advanced Analysis and Testing Center, Nanjing Forestry University, Nanjing, PR China
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, PR China
| | - Xin-Hui Zhou
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing, PR China
| | - Xu Xu
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, PR China
- College of Chemical Engineering, Nanjing Forestry University, Nanjing, PR China
| | - Hai-Jun Xu
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, PR China
- College of Chemical Engineering, Nanjing Forestry University, Nanjing, PR China
| | - Li-Ting Du
- Advanced Analysis and Testing Center, Nanjing Forestry University, Nanjing, PR China
| | - Shi-Long Yang
- College of Science, Nanjing Forestry University, Nanjing, PR China
| | - Yong Chen
- College of Science, Nanjing Forestry University, Nanjing, PR China
| | - Yuan-Yuan Xu
- College of Science, Nanjing Forestry University, Nanjing, PR China
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44
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Chamayou AC, Makhloufi G, Nafie LA, Janiak C, Lüdeke S. Solvation-Induced Helicity Inversion of Pseudotetrahedral Chiral Copper(II) Complexes. Inorg Chem 2015; 54:2193-203. [DOI: 10.1021/ic502661u] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Anne-Christine Chamayou
- Institut für Pharmazeutische Wissenschaften, Universität Freiburg, Albertstr. 25, D-79104 Freiburg, Germany
| | - Gamall Makhloufi
- Institut für
Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Laurence A. Nafie
- Department of Chemistry, Syracuse University, Syracuse, New York 13244-4100, United States
| | - Christoph Janiak
- Institut für
Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Steffen Lüdeke
- Institut für Pharmazeutische Wissenschaften, Universität Freiburg, Albertstr. 25, D-79104 Freiburg, Germany
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45
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Gil-Hernández B, Gili P, Quirós M, Sanchiz J. Mesoxalate as Cu(ii)–Ln(iii) linker in the construction of MOFs in DMSO/water medium. CrystEngComm 2015. [DOI: 10.1039/c5ce00999e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of [Cu3(Hmesox)3]3− with La(iii), Ce(iii), Pr(iii), Nd(iii) and Eu(iii) in DMSO/H2O yields 3d–4f heterometallic metal–organic frameworks, with the dimensionality of the network being controlled by the coordination number of the Ln(iii) ion.
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Affiliation(s)
- B. Gil-Hernández
- Departamento de Química
- Facultad de Ciencias
- Universidad de La Laguna
- , Spain
| | - P. Gili
- Departamento de Química
- Facultad de Ciencias
- Universidad de La Laguna
- , Spain
| | - M. Quirós
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- Granada, Spain
| | - J. Sanchiz
- Departamento de Química
- Facultad de Ciencias
- Universidad de La Laguna
- , Spain
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46
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Matsumoto A. Absolute Configuration Analysis of Organic Compounds by Single Crystal X-ray Diffraction. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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47
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Fábry J, Dušek M, Vaněk P, Rafalovskyi I, Hlinka J, Urban J. High- and low-temperature phases in isostructural 4-chloro-3-nitroaniline and 4-iodo-3-nitroaniline. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2014; 70:1153-60. [DOI: 10.1107/s2053229614024632] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 11/10/2014] [Indexed: 11/11/2022]
Abstract
The structures of 4-chloro-3-nitroaniline, C6H5ClN2O2, (I), and 4-iodo-3-nitroaniline, C6H5IN2O2, (II), are isomorphs and both undergo continuous (second order) phase transitions at 237 and 200 K, respectively. The structures, as well as their phase transitions, have been studied by single-crystal X-ray diffraction, Raman spectroscopy and difference scanning calorimetry experiments. Both high-temperature phases (293 K) show disorder of the nitro substituents, which are inclined towards the benzene-ring planes at two different orientations. In the low-temperature phases (120 K), both inclination angles are well maintained, while the disorder is removed. Concomitantly, thebaxis doubles with respect to the room-temperature cell. Each of the low-temperature phases of (I) and (II) contains two pairs of independent molecules, where the molecules in each pair are related by noncrystallographic inversion centres. The molecules within each pair have the same absolute value of the inclination angle. The Flack parameter of the low-temperature phases is very close to 0.5, indicating inversion twinning. This can be envisaged as stacking faults in the low-temperature phases. It seems that competition between the primary amine–nitro N—H...O hydrogen bonds which form three-centred hydrogen bonds is the reason for the disorder of the nitro groups, as well as for the phase transition in both (I) and (II). The backbones of the structures are formed by N—H...N hydrogen bonding of moderate strength which results in the graph-set motifC(3). This graph-set motif forms a zigzag chain parallel to the monoclinicbaxis and is maintained in both the high- and the low-temperature structures. The primary amine groups are pyramidal, with similar geometric values in all four determinations. The high-temperature phase of (II) has been described previously [Gardenet al.(2004).Acta Cryst.C60, o328–o330].
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48
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Xie L, Feng W, Li X, Meng L, Zheng X. Syntheses of Zn or Cd complexes from dicarboxylate ligand exhibiting an axial chirality and auxiliary ligand. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Ji B, Deng D, He X, Fan X, Qu G. Three transition metal complexes constructed from a rigid 2,2′-bipyridine-3,3′,6,6′-tetracarboxylic acid ligand: Syntheses, structures and their fluorescence properties. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.03.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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50
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Schmetterer C, Flandorfer H, Effenberger HS. New refinement of Ni 5.20Sn 8.7Zn 4.16Cu 1.04and its non-isotypy with Ni 2Sn 2Zn. Acta Crystallogr C 2014; 70:348-50. [DOI: 10.1107/s2053229614003660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 02/18/2014] [Indexed: 11/11/2022] Open
Abstract
The noncentrosymmetric space groupP\overline{4}3mbut a pseudocentric cubic crystal structure were reported for the compound Ni5.20Sn8.7Zn4.16Cu1.04[Larssonet al.(1994).Acta Cryst.C50, 9–12]. The recently described Ni2Sn2Zn shows a closely related structure, although it is centrosymmetric and contains additional voids which are partially occupied. Therefore, a new refinement of Ni5.20Sn8.7Zn4.16Cu1.04based on the originally published structure factors was performed. The results indicate that the structure can indeed be described in the centrosymmetric space groupPm\overline{3}m; no justification for the absence of the inversion centre could be found within the accuracy of the available data. In comparison with Ni2Sn2Zn, slight but significant differences were confirmed; consequently, the two structures are topologically related but not isotypic.
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