1
|
Barman S, Das D, Pal K. Non-covalent interactions in molecular architectures and solvent-free catalytic activity towards CO 2 fixation of mononuclear Co(III) complexes installed on modified Schiff base ligands. Dalton Trans 2024; 53:5632-5647. [PMID: 38441234 DOI: 10.1039/d3dt04293f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
A set of mononuclear cobalt(III) octahedral complexes {[Co(LH)(acac)] (Co-1H), [Co(LBr)(acac)] (Co-1Br), and [Co(LNO2)(acac)] (Co-1NO2)} were synthesized using new-generation N/O donors, maleonitrile-tethered, tetradentate heteroscorpionate half-reduced Schiff base ligands, 2-((E)-2-hydroxybenzylideneamino)-3-(pyridin-2-ylmethylamino)maleonitrile (H2LH), 2-((E)-(5-bromo-2-hydroxybenzylidene)amino)-3-((pyridin-2-ylmethyl)amino)maleonitrile (H2LBr), and 2-((E)-2-hydroxy-5-nitrobenzylideneamino)-3-(pyridin-2-ylmethylamino)maleonitrile (H2LNO2). All the compounds were well characterized spectroscopically and structurally. The non-covalent interactions present in the lattice of Co-complexes were studied in detail to explain the molecular architecture using the Hirshfeld surface (HS) analysis. The catalytic activity of CO2 fixation towards epoxides under mild and solvent-free conditions was demonstrated. The synthesized complexes are catalysts that are well-active towards the CO2 activation under ambient conditions, whereas most of the reported catalysts require harsh conditions.
Collapse
Affiliation(s)
- Souvik Barman
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
| | - Dhiraj Das
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
| | - Kuntal Pal
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
| |
Collapse
|
2
|
Keskin E, Arslan H. Palladium complexes containing NNN pincer type ligands and their activities in Suzuki-Miyaura cross coupling reaction. Heliyon 2023; 9:e17608. [PMID: 37519671 PMCID: PMC10372205 DOI: 10.1016/j.heliyon.2023.e17608] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/22/2023] [Accepted: 06/22/2023] [Indexed: 08/01/2023] Open
Abstract
Five new NNN pincer-type ligands and their palladium complexes were successfully synthesised and characterised by FT-IR, 1H NMR, 13C NMR, and UV-vis analyses. TEM analysis was used to observe the morphological character of the black residues obtained from the fourth cycle of the reusability test. Furthermore, suitable crystals of the N2,N6-bis(2-tert-butylphenyl)pyridine-2,6-dicarboxamide and its palladium complex were elucidated with the X-ray single crystal diffraction method. Both the ligand and its palladium complex crystallise in a monoclinic system with space group P21/c for the H2L4 and C2/c for the palladium complex. The structure of the pincer ligand and its palladium complex were stabilised by intramolecular and intermolecular C-H⋅⋅⋅O, C-H⋅⋅⋅N, and N-H⋅⋅⋅N contacts. A Suzuki-Miyaura cross-coupling reaction between aryl halides and phenylboronic acid was used to assess the catalytic abilities of the palladium pincer complexes. All of the prepared complexes exhibited considerable catalytic activity. However, complexes 4 (Acetonitrile-N2,N6-bis(2-tert-butylphenyl)pyridine-2,6-dicarboxamidopalladium(II)) and 5 (Acetonitrile-N2,N6-bis(2-nitrophenyl)pyridine-2,6-dicarboxamidopalladium(II)) provided almost 100% conversion with nearly 100% yield in the reaction between 4-bromotoluene and phenylboronic acid. Furthermore, these active complexes catalysed the reaction of the sterically hindered and deactivated substrates (1-Bromo-4-izobutylbenzene and 2-bromo-6-methoxynaphthalene) with phenylboronic acid, and complete conversion and yields up to 100% were achieved in a short time with the 2-bromo-6-methoxynaphthalene.
Collapse
|
3
|
Basak T, Roy S, Banerjee S, Gomila RM, Frontera A, Chattopadhyay S. Synthesis, characterization and self assembly of dinuclear zinc Schiff base complexes: A combined experimental and theoretical study. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
4
|
Kowsalya P, Neelakantan M, Bhuvanesh NS. Tetranuclear Cu(II) complex with [2+4] Cu4O4 cubane based core framework derived from 2-[{2-(1-hydroxy-ethyl)-phenylimino}-methyl]-6-methoxy-phenol: Quantifying conventional and unconventional interactions and QTAIM analysis. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132396] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
5
|
Synthesis, characterization, electrochemical behavior, and catalytic activity of cobalt(II) metal complexes with pincer-type methylbenzamide derivative ligands. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
6
|
Di- and tetra-nuclear oxorhenium(V) complexes of benzoylthiourea derivative ligands: Synthesis, structural characterization, and catalytic applications. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
7
|
Solmaz U, Keskin E, Gumus I, Cevik PK, Binzet G, Arslan H. PLATINUM(II) COMPLEX CONTAINING N-(BIS (-2,4-DIMETHOXY-BENZYL)CARBAMOTHIOYL)- 4-METHYLBENZAMIDE LIGAND: SYNTHESIS, CRYSTAL STRUCTURE, HIRSHFELD SURFACE ANALYSIS, AND ANTIMICROBIAL ACTIVITY. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622010073] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
8
|
Chaurasia R, Pandey SK, Singh DK, Bharty MK, Ganesan V, Hira SK, Manna PP, Bharti A, Butcher RJ. Antiproliferative activity and electrochemical oxygen evolution by Ni(II) complexes of N'-(aroyl)-hydrazine carbodithioates. Dalton Trans 2021; 50:14362-14373. [PMID: 34568879 DOI: 10.1039/d1dt02285g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The electrochemical water splitting by transition metal complexes is emerging very rapidly. The nickel complexes also play a very vital role in various biological activities. Here, three new ligands {H2mbhce = N'-(4-methyl-benzoyl), H2pchce = N'-(pyridine-carbonyl) and H2hbhce = N'-(2-hydroxy-benzoyl) hydrazine carbodithioic acid ethyl ester} and their corresponding Ni(II) complexes [Ni(Hmbhce)2(py)2] (1), [Ni(pchce)(o-phen)2]·CH3OH·H2O (2) and [Ni(hbhce)(o-phen)2]·1.75CHCl3·H2O (3) have been synthesized and fully characterized by various physicochemical and X-ray crystallography techniques. The photoluminescence study and thermal degradations were also examined. The treatment of K562 cells with the increasing concentrations of the nickel salts, ligands, and complexes 1, 2, and 3 showed dose-dependent cytotoxicity. The cytotoxic activity of ligands reveals that ligand H2mbhce is more potent in inhibiting the growth of tumor cells in comparison to other ligands H2pbhce and H2hbhce. Cytotoxicity assay results indicate that all complexes have remarkable cytotoxic potential in comparison to either nickel salts or the free ligands. Among these complexes, complex 1 has significantly better anti-tumor activity as compared to complexes 2 and 3. The electrochemical study of complexes 1, 2, and 3 for water oxidation reveals that all the complexes possess admirable electrocatalytic activity towards oxygen evolution reaction (OER) and have lower overpotential (328, 338, and 370 mV, respectively) than many previously reported complexes and RuO2 (390 mV). Among complexes 1, 2, and 3, complex-2 shows a better water oxidation response. Consequently, these complexes have great potential to be utilized in fuel cells. The more reliable electrochemical parameter TOF is also calculated for all three complexes.
Collapse
Affiliation(s)
- R Chaurasia
- Department of Chemistry, Banaras Hindu University, Varanasi-221005, India.
| | | | - Devesh Kumar Singh
- Department of Chemistry, Banaras Hindu University, Varanasi-221005, India.
| | - M K Bharty
- Department of Chemistry, Banaras Hindu University, Varanasi-221005, India.
| | | | - S K Hira
- Department of Zoology, Banaras Hindu University, Varanasi-221005, India
| | - P P Manna
- Department of Zoology, Banaras Hindu University, Varanasi-221005, India
| | - A Bharti
- Department of chemistry, Kirori Mal College, University of Delhi, Delhi-110007, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA
| |
Collapse
|
9
|
Basak T, Frontera A, Chattopadhyay S. Existence of stronger C H···π(chelate ring) interaction compared to C H···π(arene) interactions in the supramolecular assembly of dinuclear iron(III) Schiff base complexes: A theoretical insight. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
10
|
Tidwell JR, Africa AK, Dunnam T, Martin CD. Reactions of BCl
3
with Diiminopyridine Ligands. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- John R. Tidwell
- Department of Chemistry and Biochemistry Baylor University One Bear Place #97348 76798‐7343 Waco TX USA
| | - Abigail K. Africa
- Department of Chemistry and Biochemistry Baylor University One Bear Place #97348 76798‐7343 Waco TX USA
| | - Thomas Dunnam
- Department of Chemistry and Biochemistry Baylor University One Bear Place #97348 76798‐7343 Waco TX USA
| | - Caleb D. Martin
- Department of Chemistry and Biochemistry Baylor University One Bear Place #97348 76798‐7343 Waco TX USA
| |
Collapse
|
11
|
Crystal structure, Hirshfeld surface analysis and physicochemical studies of two new Cu(II) complexes with the ligand 2-amino-6-methylpyrimidin-4-(1H)-one. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
12
|
Shi N, Xie W, Gao W, Wang J, Zhang S, Fan Y, Wang M. Effect of PDI ligand binding pattern on the electrocatalytic activity of two Ru(II) complexes for CO
2
reduction. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5551] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ning‐ning Shi
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China
| | - Wang‐jing Xie
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China
| | - Wei‐song Gao
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China
| | - Jin‐miao Wang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China
| | - Shi‐fu Zhang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China
| | - Yu‐hua Fan
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China
| | - Mei Wang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China
| |
Collapse
|
13
|
Jebastin Andrews S, Benita Jeba Silviya S, Bhuvanesh NS, Janet Sylvia Jaba Rose J, Winfred Jebaraj J, Balakrishnan C. Crystal structure and evaluating C H⋯π (aryl/chelate) interactions in bis(2-{[(2-hydroxyethyl)imino]-methyl}-4,6-diiodophenolato)-palladium(II) Schiff base complex derived from (E)-2-(((2-hydroxyethyl)imino)methyl)-4,6-diiodophenol. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
14
|
Römelt C, Weyhermüller T, Wieghardt K. Structural characteristics of redox-active pyridine-1,6-diimine complexes: Electronic structures and ligand oxidation levels. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
15
|
Mahapatra P, Bauzá A, Frontera A, Drew MG, Ghosh A. Syntheses of four new asymmetric Schiff bases and their Cu(II) complexes: Theoretical calculations to rationalize the packing of molecules in the crystals. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.01.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
16
|
Roy S, Drew MGB, Bauzá A, Frontera A, Chattopadhyay S. Estimation of conventional C-Hπ (arene), unconventional C-Hπ (chelate) and C-Hπ (thiocyanate) interactions in hetero-nuclear nickel(ii)-cadmium(ii) complexes with a compartmental Schiff base. Dalton Trans 2018; 46:5384-5397. [PMID: 28386619 DOI: 10.1039/c6dt04906k] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Three new heteronuclear nickel(ii)/cadmium(ii) complexes, [(SCN)(Cl)Cd(L)Ni(DMF)2] (1), [(SCN)(CH3CO2)Cd(L)Ni(CH3OH)2] (2) and [(SCN)(Cl)Cd(L)Ni(NH2CH2CH2CH2NH2)]n (3) {where H2L = N,N'-bis(3-ethoxy-salicylidene)propane-1,3-diamine is a N2O4 compartmental Schiff base}, have been synthesized and characterized. The structures of the complexes have been confirmed by single crystal X-ray diffraction studies. In each complex, nickel(ii) is placed in the inner N2O2 environment and cadmium(ii) is placed in the outer O4 compartment of the compartmental Schiff base. Furthermore, the importance of unconventional C-Hπ (chelate) interactions in the solid state of both complexes and C-Hπ (thiocyanate) interaction in complex 2 has been described by means of DFT and MEP calculations and characterized using NCI plots. All complexes show photoluminescence at room temperature upon irradiation by ultraviolet light. The lifetimes of excited states are in the range of 2-6 ns.
Collapse
Affiliation(s)
- Sourav Roy
- Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata - 700032, India.
| | | | | | | | | |
Collapse
|
17
|
Maity T, Mandal H, Bauzá A, Samanta BC, Frontera A, Seth SK. Quantifying conventional C–H⋯π(aryl) and unconventional C–H⋯π(chelate) interactions in dinuclear Cu(ii) complexes: experimental observations, Hirshfeld surface and theoretical DFT study. NEW J CHEM 2018. [DOI: 10.1039/c8nj00747k] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Conventional C–H⋯π(aryl) and unconventional C–H⋯π(chelate) interactions are explored in detail.
Collapse
Affiliation(s)
- Tithi Maity
- Department of Chemistry
- P. K. College
- Purba Medinipur
- India
| | - Haridas Mandal
- Chemical División
- Geological Survey of India
- Hyderabad-500068
- India
| | - Antonio Bauzá
- Department of Chemistry
- Universitat de les Illes Balears
- 07122 Palma de Mallorca (Baleares)
- Spain
| | | | - Antonio Frontera
- Department of Chemistry
- Universitat de les Illes Balears
- 07122 Palma de Mallorca (Baleares)
- Spain
| | - Saikat Kumar Seth
- Department of Chemistry
- Universitat de les Illes Balears
- 07122 Palma de Mallorca (Baleares)
- Spain
- Department of Physics
| |
Collapse
|
18
|
Tiekink ER. Supramolecular assembly based on “emerging” intermolecular interactions of particular interest to coordination chemists. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.01.009] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
19
|
A Hirshfeld surface analysis, crystal structure and physicochemical studies of a new Cd(II) complex with the 2-amino-4-methylpyrimidine ligand. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
20
|
The influence of substituents on cooperativity between CH···π and N···H hydrogen bonds in a T-shaped configuration: X-benzene⊥(FH···pyrazine···HF) complexes as a working model. Struct Chem 2016. [DOI: 10.1007/s11224-016-0777-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Chow PK, Cheng G, Tong GSM, Ma C, Kwok WM, Ang WH, Chung CYS, Yang C, Wang F, Che CM. Highly luminescent palladium(ii) complexes with sub-millisecond blue to green phosphorescent excited states. Photocatalysis and highly efficient PSF-OLEDs. Chem Sci 2016; 7:6083-6098. [PMID: 30034749 PMCID: PMC6024183 DOI: 10.1039/c6sc00462h] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 05/23/2016] [Indexed: 01/01/2023] Open
Abstract
Palladium(ii) complexes supported by tetradentate [N^C^C^N] and [O^N^C^N] ligand systems display sky blue to red phosphorescence with emission quantum yields and emission lifetimes up to 0.64 and 272 μs, respectively. Femtosecond time-resolved fluorescence (fs-TRF) measurements on these Pd(ii) complexes reveal a fast intersystem crossing from singlet to triplet manifolds with time constants of 0.6-21 ps. DFT/TDDFT calculations revealed that, as a result of the spiro-fluorene and bridging tertiary amine units of the ligands, the T1 excited state is more ligand-localized and has smaller structural distortion, leading to slower non-radiative decay as well as radiative decay of T1 → S0 transition and thereby highly emissive, long-lived triplet excited states. The Pd(ii) complexes have been found to be efficient catalysts for visible light-driven, reductive C-C bond formation from unactivated alkyl bromides with conversions and yields of up to 90% and 83%, respectively. These complexes have also been employed as photosensitizers for [2 + 2] cycloaddition of styrenes, with conversions and yields comparable to those of the reported Ir(iii) complexes. Both green and sky blue organic-light emitting devices (OLEDs) have been generated with these Pd(ii) complexes as guest emitters. Maximum external quantum efficiencies (EQE) of up to 16.5% have been achieved in the sky blue OLEDs. The long emission lifetimes render the Pd(ii) complexes good sensitizers for phosphor-sensitized fluorescent OLEDs (PSF-OLEDs). By utilizing these phosphorescent Pd(ii) complexes as sensitizers, highly efficient green and yellow PSF-OLEDs having high EQE (up to 14.3%), high colour purity and long operation lifetimes, with 90% of initial luminance (LT90) for more than 80 000 h, have been realized.
Collapse
Affiliation(s)
- Pui-Keong Chow
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Gang Cheng
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
| | - Glenna So Ming Tong
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Chensheng Ma
- School of Chemistry and Chemical Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Wai-Ming Kwok
- Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , China
| | - Wai-Hung Ang
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Clive Yik-Sham Chung
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Chen Yang
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Feng Wang
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
| |
Collapse
|
22
|
Tan YS, Halim SNA, Molloy KC, Sudlow AL, Otero-de-la-Roza A, Tiekink ERT. Persistence of C–H⋯π(chelate ring) interactions in the crystal structures of Pd(S2COR)2. The utility of Pd(S2COR)2as precursors for palladium sulphide materials. CrystEngComm 2016. [DOI: 10.1039/c5ce02126j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of C–H⋯π(PdS2C) interactions in the molecular packing of Pd(S2COR)2increases as the steric bulk ofRincreases.
Collapse
Affiliation(s)
- Yee Seng Tan
- Department of Chemistry
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | | | | | - Anna L. Sudlow
- Department of Chemistry
- University of Bath
- Bath BA2 7AY, UK
| | - A. Otero-de-la-Roza
- National Institute for Nanotechnology
- National Research Council of Canada
- Edmonton, T6G 2M9 Canada
| | - Edward R. T. Tiekink
- Department of Chemistry
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
- Centre for Crystalline Materials
- Faculty of Science and Technology
| |
Collapse
|
23
|
Flisak Z, Sun WH. Progression of Diiminopyridines: From Single Application to Catalytic Versatility. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00820] [Citation(s) in RCA: 162] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zygmunt Flisak
- Key
Laboratory of Engineering Plastics and Beijing
National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Faculty
of Chemistry, Opole University, Oleska 48, 45-052 Opole, Poland
| | - Wen-Hua Sun
- Key
Laboratory of Engineering Plastics and Beijing
National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| |
Collapse
|
24
|
Hernández-Juárez M, Toscano RA, Cortés-Guzmán F, Zúñiga-Villarreal N. Hydrogen and oxygen activation by an iridium precursor containing the 4,5-bis(diphenylthiophosphinoyl)-1,2,3-triazolate ligand. RSC Adv 2015. [DOI: 10.1039/c5ra07698f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Complex [Ir(κ2-S,N-(4,5-(P(S)Ph2)2Tz))(coe)2] (coe = cyclooctene) was prepared upon reaction of potassium 4,5-bis(diphenylthiophosphinoyl)-1,2,3-triazolate with [Ir(coe)2(μ-Cl)]2. Its phosphorus derivatives were susceptible of oxidative addition processes.
Collapse
Affiliation(s)
- M. Hernández-Juárez
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- D. F
- 04510 Mexico
| | - R. A. Toscano
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- D. F
- 04510 Mexico
| | - F. Cortés-Guzmán
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- D. F
- 04510 Mexico
| | - N. Zúñiga-Villarreal
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- D. F
- 04510 Mexico
| |
Collapse
|
25
|
Kalidasan M, Forbes S, Mozharivskyj Y, Kollipara MR. Half-sandwich η 6 -arene ruthenium and Cp ∗ rhodium/iridium compounds comprising with thioether ligands: Synthesis, spectral and molecular studies. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.05.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
26
|
Sharma AK, Joshi H, Sharma KN, Gupta PL, Singh AK. 2-Propanol vs Glycerol as Hydrogen Source in Catalytic Activation of Transfer Hydrogenation with (η6-Benzene)ruthenium(II) Complexes of Unsymmetrical Bidentate Chalcogen Ligands. Organometallics 2014. [DOI: 10.1021/om500579r] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Alpesh K. Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Hemant Joshi
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Kamal Nayan Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Pancham L. Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Ajai K. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| |
Collapse
|
27
|
Žilić D, Rakvin B, Milić D, Pajić D, Đilović I, Cametti M, Džolić Z. Crystal structures and magnetic properties of a set of dihalo-bridged oxalamidato copper(ii) dimers. Dalton Trans 2014; 43:11877-87. [DOI: 10.1039/c4dt00925h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
28
|
Variation in molecular and crystalline architectures of di- and poly-nuclear cadmium(II) complexes on changing the denticity of the blocking ligands. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.02.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
29
|
Upadhyay A, Rajpurohit J, Kumar Singh M, Dubey R, Srivastava AK, Kumar A, Rajaraman G, Shanmugam M. Hydroxo-bridged dimers of oxo-centered ruthenium(III) triangle: synthesis and spectroscopic and theoretical investigations. Chemistry 2014; 20:6061-70. [PMID: 24700566 DOI: 10.1002/chem.201304826] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Indexed: 11/10/2022]
Abstract
The homometallic hexameric ruthenium cluster of the formula [Ru(III)6(μ3-O)2(μ-OH)2((CH3)3CCO2)12(py)2] (1) (py = pyridine) is solved by single-crystal X-ray diffraction. Magnetic susceptibility measurements performed on 1 suggest that the antiferromagnetic interaction between the Ru(III) centers is dominant, and this is supported by theoretical studies. Theoretical calculations based on density functional methods yield eight different exchange interaction values for 1: J1 = -737.6, J2 = +63.4, J3 = -187.6, J4 = +124.4, J5 = -376.4, J6 = -601.2, J7 = -657.0, and J8 = -800.6 cm(-1). Among all the computed J values, six are found to be antiferromagnetic. Four exchange values (J1, J6, J7 and J8) are computed to be extremely strong, with J8, mediated through one μ-hydroxo and a carboxylate bridge, being by far the largest exchange obtained for any transition-metal cluster. The origin of these strong interactions is the orientation of the magnetic orbitals in the Ru(III) centers, and the computed J values are rationalized by using molecular orbital and natural bond order analysis. Detailed NMR studies ((1)H, (13)C, HSQC, NOESY, and TOCSY) of 1 (in CDCl3) confirm the existence of the solid-state structure in solution. The observation of sharp NMR peaks and spin-lattice time relaxation (T1 relaxation) experiments support the existence of strong intramolecular antiferromagnetic exchange interactions between the metal centers. A broad absorption peak around 600-1000 nm in the visible to near-IR region is a characteristic signature of an intracluster charge-transfer transition. Cyclic voltammetry experiments show that there are three reversible one-electron redox couples at -0.865, +0.186, and +1.159 V with respect to the Ag/AgCl reference electrode, which corresponds to two metal-based one-electron oxidations and one reduction process.
Collapse
Affiliation(s)
- Apoorva Upadhyay
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400 076 (India), Fax: (+91) 22-2576-7152
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Das M, Harms K, Chattopadhyay S. Novel tandem synthesis of bis(μ-NN′-tetrazolate) bridged dinuclear nickel(ii) Schiff base complex via [3 + 2] cyclo-addition at ambient condition. Dalton Trans 2014; 43:5643-7. [DOI: 10.1039/c3dt52398e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bis(μ-NN′-tetrazolate) bridged dinuclear nickel(ii) Schiff base complex was synthesized via [3 + 2] cycloaddition reaction of 2-cyanopyrazine and sodium azide.
Collapse
Affiliation(s)
- Mithun Das
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata - 700 032, India
| | - Klaus Harms
- Fachbereich Chemie
- Philipps-Universität Marburg
- D-35032 Marburg, Germany
| | | |
Collapse
|
31
|
Câmpian M, Haiduc I, Tiekink ERT. Steric control over C=O...C=O interactions in M(S2COR)2(dafone) compounds: M = Zn and Cd; R = Me, Et and iPr; dafone = 4,5-diazafluoren-9-one-N,N′. Z KRIST-CRYST MATER 2013. [DOI: 10.1524/zkri.2013.1579] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Crystallography shows that with the smaller xanthate-bound methyl groups in Zn(S2COMe)2(dafone) (1) and Cd(S2COMe)2(dafone) (3) anti-parallel C=O…C=O interactions link molecules into dimers. These are further associated via π—π interactions into a supramolecular chain, and in the case of 3 into a supramolecular two-dimensional array via C—H…S contacts. Increasing the size of the organic residue, i.e. to ethyl and isopropyl in Zn(S2COEt)2(dafone) (2), Cd(S2COEt)2(dafone) (4) and Cd(S2CO-iPr)2(dafone) (5), does not allow for the formation of this supramolecular architecture. Instead, supramolecular chains are sustained by C—H…S and C—H…π(chelate) interactions (the latter exclusively in the case of 5). The presence of recognisable/significant π—π and C—H…S and C—H…π(chelate) interactions is not consistent amongst the series yet only two crystal packing patterns are noted depending on the presence of the C=O…C=O interactions. This observation points to the importance of overall crystal packing considerations of binuclear species in 1 and 3, and mononuclear species in 2, 4 and 5.
Collapse
|
32
|
Prakash O, Sharma KN, Joshi H, Gupta PL, Singh AK. Half sandwich complexes of chalcogenated pyridine based bi-(N, S/Se) and terdentate (N, S/Se, N) ligands with (η6-benzene)ruthenium(ii): synthesis, structure and catalysis of transfer hydrogenation of ketones and oxidation of alcohols. Dalton Trans 2013; 42:8736-47. [DOI: 10.1039/c3dt00126a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
33
|
Singh M, Bharty MK, Singh A, Kashyap S, Singh UP, Singh NK. Mn(II) complexes of N′-(2-methoxybenzoyl)hydrazine carbodithioic acid ethyl ester: synthesis, spectral and structural characterization. TRANSIT METAL CHEM 2012. [DOI: 10.1007/s11243-012-9640-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
34
|
|
35
|
Čobeljić B, Warżajtis B, Rychlewska U, Radanović§ D, Spasojević V, Sladić D, Eshkourfu R, Anđelković K. Synthesis and structure of a Ni(II) complex with N′,N′ 2-bis[(1E)-1-(2-quinolyl)methylene]propanedihydrazide: multiple intramolecular CH ··· π interactions between quinoline and quinolineimine chelate. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.658778] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Božidar Čobeljić
- a Faculty of Chemistry, University of Belgrade , Studentski trg 12-16, 11000 Belgrade , Serbia
| | - Beata Warżajtis
- b Faculty of Chemistry, A. Mickiewicz University , Grunwaldzka 6, 60-780 Poznań , Poland
| | - Urszula Rychlewska
- b Faculty of Chemistry, A. Mickiewicz University , Grunwaldzka 6, 60-780 Poznań , Poland
| | - Dušanka Radanović§
- c Institute of Chemistry, Technology and Metallurgy, University of Belgrade , Njegoševa 12, P.O. Box 815, 11000 Belgrade , Serbia
| | - Vojislav Spasojević
- d Institute of Nuclear Sciences ‘Vinča’, Condensed Matter Physics Laboratory , P.O. Box 522, 11001 Belgrade , Serbia
| | - Dušan Sladić
- a Faculty of Chemistry, University of Belgrade , Studentski trg 12-16, 11000 Belgrade , Serbia
| | - Rabia Eshkourfu
- a Faculty of Chemistry, University of Belgrade , Studentski trg 12-16, 11000 Belgrade , Serbia
| | - Katarina Anđelković
- a Faculty of Chemistry, University of Belgrade , Studentski trg 12-16, 11000 Belgrade , Serbia
| |
Collapse
|
36
|
Castiñeiras A, Fernández-Hermida N, García-Santos I, Pérez-Lustres JL, Rodríguez-González I. Luminescent complexes of silver(i) with pyridylbis(3-hexamethyleneiminyl thiosemicarbazone): effect of the counterion on the nuclearity. Dalton Trans 2012; 41:3787-96. [DOI: 10.1039/c2dt12204a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
37
|
Zukerman-Schpector J, Haiduc I, Tiekink ER. Supramolecular Self-assembly of Transition Metal Carbonyl Molecules Through M–CO(Lone Pair)…π(Arene) Interactions. ADVANCES IN ORGANOMETALLIC CHEMISTRY VOLUME 60 2012. [DOI: 10.1016/b978-0-12-396970-5.00002-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
38
|
Smelser AM, Li YF, Carmichael CN, Zhao HY, Pan WP, Parkin S, Yan B. Self-assembly of 1D metalloporphyrin array within pseudo-hexagonal channels of polyoxometalates. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.04.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
39
|
Günnaz S, Özdemir N, Dayan S, Dayan O, Çetinkaya B. Synthesis of Ruthenium(II) Complexes Containing Tridentate Triamine (′N ͡N ͡N′) and Bidentate Diamine Ligands (N ͡N′): as Catalysts for Transfer Hydrogenation of Ketones. Organometallics 2011. [DOI: 10.1021/om200470p] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Salih Günnaz
- Department of Chemistry, Ege University, 35100 İzmir, Turkey
| | - Namık Özdemir
- Department of Physics, Faculty of Art and Sciences, Ondokuz Mayıs University, 55139 Samsun, Turkey
| | - Serkan Dayan
- Department of Chemistry, Faculty of Science, Erciyes University, 38039 Kayseri, Turkey
| | - Osman Dayan
- Laboratory of Inorganic Synthesis and Molecular Catalysis, Çanakkale Onsekiz Mart University, 17020 Çanakkale, Turkey
| | - Bekir Çetinkaya
- Department of Chemistry, Ege University, 35100 İzmir, Turkey
| |
Collapse
|
40
|
Brandi-Blanco MDP, Choquesillo-Lazarte D, Domínguez-Martín A, González-Pérez JM, Castiñeiras A, Niclós-Gutiérrez J. Metal ion binding patterns of acyclovir: Molecular recognition between this antiviral agent and copper(II) chelates with iminodiacetate or glycylglycinate. J Inorg Biochem 2011; 105:616-23. [DOI: 10.1016/j.jinorgbio.2011.02.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 02/02/2011] [Accepted: 02/03/2011] [Indexed: 11/29/2022]
|
41
|
Takahashi O, Kohno Y, Nishio M. Relevance of weak hydrogen bonds in the conformation of organic compounds and bioconjugates: evidence from recent experimental data and high-level ab initio MO calculations. Chem Rev 2011; 110:6049-76. [PMID: 20550180 DOI: 10.1021/cr100072x] [Citation(s) in RCA: 495] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Osamu Takahashi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima, 739-8526, Japan.
| | | | | |
Collapse
|
42
|
Tiekink ERT, Zukerman-Schpector J. Emerging supramolecular synthons: C–H⋯π(chelate) interactions in metal bis(1,1-dithiolates). Chem Commun (Camb) 2011; 47:6623-5. [DOI: 10.1039/c1cc11173f] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Janjić GV, Petrović PV, Ninković DB, Zarić SD. Geometries of stacking interactions between phenanthroline ligands in crystal structures of square-planar metal complexes. J Mol Model 2010; 17:2083-92. [PMID: 21161558 DOI: 10.1007/s00894-010-0905-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 11/15/2010] [Indexed: 11/26/2022]
Abstract
Stacking interactions of phenanthroline square-planar complexes in crystal structures were studied by analyzing data from the Cambridge Structural Database. In most of the crystal structures, two phenanthroline complexes were oriented "head to tail." Phenanthroline complexes show a wide range of overlap geometries in stacking interactions, while short metal-metal distances were not observed. Stacking chains with alternating overlaps were the predominant type of packing in the crystal structures.
Collapse
Affiliation(s)
- Goran V Janjić
- ICTM, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
| | | | | | | |
Collapse
|
44
|
Janjić G, Andrić J, Kapor A, Bugarčić ŽD, Zarić SD. Classification of stacking interaction geometries of terpyridyl square-planar complexes in crystal structures. CrystEngComm 2010. [DOI: 10.1039/b917268h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
45
|
Carballo R, Covelo B, Fernández-Hermida N, Lago AB, Vázquez-López EM. Structural evidence for metalloaromaticity in a new molecular complex with the divergent ligand 4,4′-dipyridyldisulfide. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.07.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
46
|
Lu XY, Xu HJ, Chen XT. Synthesis, structure and catalytic activities for the hydrogen transfer reactions of the ruthenium(II) carbonyl chloride complexes with pyridine-2,6-diimine. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2009.07.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
47
|
Nishio M, Umezawa Y, Honda K, Tsuboyama S, Suezawa H. CH/π hydrogen bonds in organic and organometallic chemistry. CrystEngComm 2009. [DOI: 10.1039/b902318f] [Citation(s) in RCA: 481] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
48
|
Barbasiewicz M, Szadkowska A, Makal A, Jarzembska K, Woźniak K, Grela K. Is the Hoveyda-Grubbs Complex a Vinylogous Fischer-Type Carbene? Aromaticity-Controlled Activity of Ruthenium Metathesis Catalysts. Chemistry 2008; 14:9330-7. [DOI: 10.1002/chem.200800704] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
49
|
Synthetic, spectral and structural studies of ruthenium(II) compounds based on 2,6-diacetylpyridinemonoxime. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.11.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
50
|
Stojanović SD, Medaković VB, Predović G, Beljanski M, Zarić SD. XH/pi interactions with the pi system of porphyrin ring in porphyrin-containing proteins. J Biol Inorg Chem 2007; 12:1063-71. [PMID: 17659366 DOI: 10.1007/s00775-007-0276-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Accepted: 06/28/2007] [Indexed: 11/29/2022]
Abstract
Searching structures of porphyrin-containing proteins from the Protein Data Bank revealed that the pi system of every porphyrin ring is involved in XH/pi interactions, with most of the porphyrins having several interactions. Both five-membered pyrrole rings and six-membered chelate rings are involved in XH/pi interactions; the number of interactions with five-membered rings is larger than the number of interactions with six-membered rings. We found interactions with C-H and N-H groups as hydrogen-atom donors; however, the number of CH/pi interactions is much larger than the number of NH/pi interactions. The amino acids involved in the interactions show a high conservation score. Our results that every porphyrin is involved in XH/pi interactions and that amino acids involved in these interactions are highly conserved demonstrate that XH/pi interactions play an important role in porphyrin-protein stability.
Collapse
Affiliation(s)
- Srdan D Stojanović
- Department of Chemistry, University of Belgrade, Studentski trg 16, 11001 Belgrade, Serbia
| | | | | | | | | |
Collapse
|