1
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Hum G, Phang SJI, Ong HC, León F, Quek S, Khoo YXJ, Li C, Li Y, Clegg JK, Díaz J, Stuparu MC, García F. Main Group Molecular Switches with Swivel Bifurcated to Trifurcated Hydrogen Bond Mode of Action. J Am Chem Soc 2023. [PMID: 37267593 DOI: 10.1021/jacs.2c12713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Artificial molecular machines have captured the full attention of the scientific community since Jean-Pierre Sauvage, Fraser Stoddart, and Ben Feringa were awarded the 2016 Nobel Prize in Chemistry. The past and current developments in molecular machinery (rotaxanes, rotors, and switches) primarily rely on organic-based compounds as molecular building blocks for their assembly and future development. In contrast, the main group chemical space has not been traditionally part of the molecular machine domain. The oxidation states and valency ranges within the p-block provide a tremendous wealth of structures with various chemical properties. Such chemical diversity─when implemented in molecular machines─could become a transformative force in the field. Within this context, we have rationally designed a series of NH-bridged acyclic dimeric cyclodiphosphazane species, [(μ-NH){PE(μ-NtBu)2PE(NHtBu)}2] (E = O and S), bis-PV2N2, displaying bimodal bifurcated R21(8) and trifurcated R31(8,8) hydrogen bonding motifs. The reported species reversibly switch their topological arrangement in the presence and absence of anions. Our results underscore these species as versatile building blocks for molecular machines and switches, as well as supramolecular chemistry and crystal engineering based on cyclophosphazane frameworks.
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Affiliation(s)
- Gavin Hum
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Si Jia Isabel Phang
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - How Chee Ong
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felix León
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Shina Quek
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yi Xin Joycelyn Khoo
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Chenfei Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yongxin Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Jack K Clegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, Cooper Road, St Lucia 4072, Queensland, Australia
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria Extremadura, Avda de la Universidad s/n, Cáceres 10003, Spain
| | - Mihaiela C Stuparu
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felipe García
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Claveria 8, Oviedo 33006, Asturias, Spain
- School of Chemistry, Monash University, Clayton 3800, Victoria, Australia
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2
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Subtraction by addition: chalcogen-oxidation induced N–C bond scissions in bis(amido)cyclodiphosphazane chelates of the Group 15 elements. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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3
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Ng ZX, Tan D, Teo WL, León F, Shi X, Sim Y, Li Y, Ganguly R, Zhao Y, Mohamed S, García F. Mechanosynthesis of Higher‐Order Cocrystals: Tuning Order, Functionality and Size in Cocrystal Design**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zi Xuan Ng
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Davin Tan
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Wei Liang Teo
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Felix León
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Xiaoyan Shi
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 Guangdong P. R. China
| | - Ying Sim
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Yongxin Li
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Rakesh Ganguly
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
- Department of Chemistry Shiv Nadar University NH91, Tehsil Dadri, Gautam Buddha Nagard 201314 Uttar Pradesh India
| | - Yanli Zhao
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Sharmarke Mohamed
- Department of Chemistry Green Chemistry & Materials Modelling Laboratory Khalifa University of Science and Technology P.O. Box 127788 Abu Dhabi United Arab Emirates
| | - Felipe García
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
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4
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Ng ZX, Tan D, Teo WL, León F, Shi X, Sim Y, Li Y, Ganguly R, Zhao Y, Mohamed S, García F. Mechanosynthesis of Higher-Order Cocrystals: Tuning Order, Functionality and Size in Cocrystal Design*. Angew Chem Int Ed Engl 2021; 60:17481-17490. [PMID: 33982390 PMCID: PMC8362154 DOI: 10.1002/anie.202101248] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Indexed: 01/18/2023]
Abstract
The ability to rationally design and predictably construct crystalline solids has been the hallmark of crystal engineering research. To date, numerous examples of multicomponent crystals comprising organic molecules have been reported. However, the crystal engineering of cocrystals comprising both organic and inorganic chemical units is still poorly understood and mostly unexplored. Here, we report a new diverse set of higher-order cocrystals (HOCs) based on the structurally versatile-yet largely unexplored-phosph(V/V)azane heterosynthon building block. The novel ternary and quaternary cocrystals reported are held together by synergistic and orthogonal intermolecular interactions. Notably, the HOCs can be readily obtained either via sequential or one-pot mechanochemical methods. Computational modelling methods reveal that the HOCs are thermodynamically driven to form and that their mechanical properties strongly depend on the composition and intermolecular forces in the crystal, offering untapped potential for optimizing material properties.
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Affiliation(s)
- Zi Xuan Ng
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
| | - Davin Tan
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
| | - Wei Liang Teo
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
| | - Felix León
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
| | - Xiaoyan Shi
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
- School of Materials and EnergyGuangdong University of TechnologyGuangzhou510006GuangdongP. R. China
| | - Ying Sim
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
| | - Yongxin Li
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
| | - Rakesh Ganguly
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
- Department of ChemistryShiv Nadar UniversityNH91, Tehsil Dadri, Gautam Buddha Nagard201314Uttar PradeshIndia
| | - Yanli Zhao
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
| | - Sharmarke Mohamed
- Department of ChemistryGreen Chemistry & Materials Modelling LaboratoryKhalifa University of Science and TechnologyP.O. Box 127788Abu DhabiUnited Arab Emirates
| | - Felipe García
- School of Physical and Mathematical SciencesDivision of Chemistry and Biological ChemistryNanyang Technological University21 Nanyang Link637371SingaporeSingapore
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5
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Musongong JT, Otang ME, Mash BL, Zeller M, Stahl L. Covalent and ionic bonding in bi- and tricyclic Group 15 amides: equidistant P-I and As-I bonds and fluxional cations. Dalton Trans 2020; 49:6341-6354. [PMID: 32347265 DOI: 10.1039/d0dt01163k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of trivalent Group 15 bis(tert-butylamido)cyclodiphosph(iii)azane element bi- and tricycles of the formulae {[(tBuNP)2(tBuN)2]ElX}, El = P, As, Sb, Bi, where X = Ph, OPh, OtBu, N3, hexamethyldisilylamide (HMDS), OTf, was synthesized from the corresponding chlorides via salt elimination. The ensuing compounds were studied spectroscopically and X-ray crystallographically with a particular focus on the length of the El-X bond. While the Group 15 element to phenyl and HMDS were of normal lengths and completely covalent, those to azide appeared to be partly ionic. The {[(tBuNP)2(tBuN)2]ElI} showed El-I bonds that were substantially longer than the typical element iodide bonds, suggesting a very high degree of polarity and bordering on ionic bonding. Finally, the triflate [(tBuNP)2(tBuN)2]P] + [SO3CF3]- proved to be an ion pair in the solid state. The antimony analog, however, showed a long covalent Sb-O bond in the solid state, although it appears to dissociate into ions in solution. The phosphonium triflate salt is fluxional and exhibits a previously unseen highly symmetrical structure in solution. The bonding trends from completely covalent to completely ionic are discussed in terms steric restrictions and the delocalization of charge in either the cation or the anion.
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Affiliation(s)
- Joseph T Musongong
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202 USA.
| | - Mathew E Otang
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202 USA.
| | - Brandon L Mash
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907 USA
| | - Matthias Zeller
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907 USA
| | - Lothar Stahl
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202 USA.
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6
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Plajer AJ, Lee S, Bond AD, Goodman JM, Wright DS. Charge-assisted phosph(v)azane anion receptors. Dalton Trans 2020; 49:3403-3407. [PMID: 32129399 DOI: 10.1039/d0dt00489h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Coordination of Cu(i) or Pd(ii) to seleno-cyclodiphosph(v)azanes of the type [RNH(Se)P(μ-NtBu)]2 results in positively charged anion receptor units which have increased anion affinity over the neutral seleno-phosph(v)azanes, due to the increase in electrostatic interactions between the receptor and the guest anions. The same effect is produced by replacement of one of the P[double bond, length as m-dash]Se units by a P-Me+ unit.
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Affiliation(s)
- Alex J Plajer
- Chemistry Department, Cambridge University, Lensfield Road, Cambridge CB2 1EW, UK.
| | - Sanha Lee
- Chemistry Department, Cambridge University, Lensfield Road, Cambridge CB2 1EW, UK.
| | - Andrew D Bond
- Chemistry Department, Cambridge University, Lensfield Road, Cambridge CB2 1EW, UK.
| | - Jonathan M Goodman
- Chemistry Department, Cambridge University, Lensfield Road, Cambridge CB2 1EW, UK.
| | - Dominic S Wright
- Chemistry Department, Cambridge University, Lensfield Road, Cambridge CB2 1EW, UK.
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7
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Hua G, Woollins JD. Organophosphorus-selenium/tellurium reagents: from synthesis to applications. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2017-0132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Organic selenium- and tellurium-phosphorus compounds have found wide application as reagents in synthetic inorganic and organic chemistry, such as oxygen/chalcogen exchange, oxidation/reduction, nucleophilic/electrophilic substitution, nucleophilic addition, free radical addition, Diels–Alder reaction, cycloadditions, coordination, and so on. This chapter covers the main classes of phosphorus-selenium/tellurium reagents, including binary phosphorus-selenium/tellurium species, organophosphorus(III)-selenium/tellurium compounds, phosphorus(V)-selenides/tellurides, diselenophosphinates/ditellurophopshinates, diselenaphosphetane diselenides, Woollins’ reagent, phosphorus-selenium/tellurium amides, and imides. Given the huge amount of literature up to mid-2017, this overview is inevitably selective and will focus particularly on their synthesis, reactivity, and applications in synthetic and coordination chemistry.
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8
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Haiduc I. Review: Inverse coordination. Inorganic open and cyclic nitrogen heteroatom molecules as coordination centers. A survey of molecular topologies. J COORD CHEM 2019. [DOI: 10.1080/00958972.2018.1556393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ionel Haiduc
- Facultatea de Chimie, Universitatea Babeş-Bolyai, Cluj-Napoca, Romania
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9
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Vrána J, Jambor R, RůŽička A, Dostál L. New synthetic strategies leading to [RNPNR] - anions and the isolation of the [P(Nt-Bu) 3] 3- trianion. Dalton Trans 2018; 47:8434-8441. [PMID: 29897357 DOI: 10.1039/c8dt02141d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
New and straightforward synthetic paths for the syntheses of [RNPNR]- anions (R = t-Bu (1) or CPh3 (6)) in the form of their tmeda- or thf-coordinated lithium salts are described. The attempts to isolate the sodium analogue [(Ph3CNPNCPh3)Na·(thf)x] (8) remained unsuccessful probably due to its high reactivity although its formation in the reaction of the parent cis-[(Ph3CNP)2(Ph3CNH)2] (5) with 2 eq. of sodium naphthalenide was corroborated by NMR spectroscopy. Importantly, when an excess of sodium naphthalenide was used in the reaction with 5, [(Ph3C)Na(thf)3] (9) was obtained along with a complex mixture of other by-products indicating the cleavage of the C-N bond in the starting material. Furthermore, the synthesis and the structural characterization of the [P(Nt-Bu)3]3- trianion as its trilithium salt [P(Nt-Bu)3Li3]2 (10) has been successfully achieved.
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Affiliation(s)
- Jan Vrána
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
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10
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Plajer AJ, Garcia-Rodriguez R, Rizzuto FJ, Wright DS. Flexible Bonding of the Phosph(V)azane Dianions [S(E)P(μ-Nt
Bu)]2
2−. Chemistry 2018; 24:2013-2019. [DOI: 10.1002/chem.201705413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Alex J. Plajer
- Chemistry Department; Cambridge University; Lensfield Road Cambridge CB2 1EW United Kingdom
| | - Raul Garcia-Rodriguez
- GIR MIOMeT-IU Cinquima-Química Inorgánica; Facultad de Ciencias; Universidad de Valladolid; Campus Miguel, Delibes 47011 Valladolid Spain
| | - Felix J. Rizzuto
- Chemistry Department; Cambridge University; Lensfield Road Cambridge CB2 1EW United Kingdom
| | - Dominic S. Wright
- Chemistry Department; Cambridge University; Lensfield Road Cambridge CB2 1EW United Kingdom
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11
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Otang ME, Josephson D, Duppong T, Stahl L. The chameleonic reactivity of dilithio bis(alkylamido)cyclodiphosph(iii)azanes with chlorophosphines. Dalton Trans 2018; 47:11625-11635. [DOI: 10.1039/c8dt02087f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Analogous reactions do not necessarily give analogous products.
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Affiliation(s)
- Mathew E. Otang
- Department of Chemistry
- University of North Dakota
- Grand Forks
- USA
| | - David Josephson
- Department of Chemistry
- University of North Dakota
- Grand Forks
- USA
| | - Todd Duppong
- Department of Chemistry
- University of North Dakota
- Grand Forks
- USA
| | - Lothar Stahl
- Department of Chemistry
- University of North Dakota
- Grand Forks
- USA
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12
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Plajer AJ, Niu HC, Rizzuto FJ, Wright DS. Formation and selection of the macrocycle [{(tBuN)P(μ-NtBu)}2(μ-Se)2{P(μ-NtBu)}2]3. Dalton Trans 2018; 47:6675-6678. [DOI: 10.1039/c8dt01143e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Se-bridged PIII/PV phosphazane macrocycle [{(tBuN)PV(μ-NtBu)}2(μ-Se)2{PIII(μ-NtBu)}2]3 is obtained selectively using [Se(tBuN)P(μ-NtBu)]22− as a nucleophilic component.
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Affiliation(s)
- Alex J. Plajer
- Chemistry Department
- Cambridge University
- Cambridge CB2 1EW
- UK
| | - Hao-Che Niu
- Chemistry Department
- Cambridge University
- Cambridge CB2 1EW
- UK
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13
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Bawari D, Prashanth B, Jaiswal K, Choudhury AR, Singh S. Product Isomer Distribution in the Sequential Functionalization of Cyclic P
III
2
N
2
Frameworks. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Deependra Bawari
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali Knowledge City, Sector 81 140306 SAS Nagar, Mohali Punjab India
| | - Billa Prashanth
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali Knowledge City, Sector 81 140306 SAS Nagar, Mohali Punjab India
| | - Kuldeep Jaiswal
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali Knowledge City, Sector 81 140306 SAS Nagar, Mohali Punjab India
| | - Angshuman Roy Choudhury
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali Knowledge City, Sector 81 140306 SAS Nagar, Mohali Punjab India
| | - Sanjay Singh
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali Knowledge City, Sector 81 140306 SAS Nagar, Mohali Punjab India
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14
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Plajer AJ, Bold K, Rizzuto FJ, García-Rodríguez R, Ronson TK, Wright DS. Isomerisation, reactivity and coordination chemistry of a new hybrid, multi-functional phosphazane. Dalton Trans 2017; 46:12775-12779. [DOI: 10.1039/c7dt03074f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The unsymmetrical PIII/PV cyclodiphosphazane [(S)(H)P(μ-NtBu)2PNHtBu] provides entry into the mixed chalgogenide dianion [(S)P(μ-NtBu)2P(Se)NtBu]2−, and unique insight into the mechanisms of cis/trans isomerism in phosph(iii)- and phosph(v)-azanes.
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Affiliation(s)
- Alex J. Plajer
- Chemistry Department
- Cambridge University
- Cambridge CB2 1EW
- UK
| | - Kevin Bold
- Chemistry Department
- Cambridge University
- Cambridge CB2 1EW
- UK
| | | | - Raúl García-Rodríguez
- GIR MIOMeT-IU Cinquima-Química Inorgánica
- Facultad de Ciencias
- Campus Miguel
- Delibes
- Universidad de Valladolid
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15
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Otang ME, Lief GR, Stahl L. Alkoxido-, amido-, and chlorido derivatives of zirconium- and hafnium bis(amido)cyclodiphosph(V)azanes: Ligand ambidenticity and catalytic productivity. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Bawari D, Prashanth B, Ravi S, Shamasundar KR, Singh S, Wright DS. Two Different Pathways in the Reduction of [(S=)PCl(μ-Nt
Bu)]2
with Na. Chemistry 2016; 22:12027-33. [DOI: 10.1002/chem.201600839] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Deependra Bawari
- Department of Chemical Sciences; Indian Institute of Science Education and Research Mohali; Knowledge City, Sector 81, SAS Nagar, Mohali 140306 Punjab India
| | - Billa Prashanth
- Department of Chemical Sciences; Indian Institute of Science Education and Research Mohali; Knowledge City, Sector 81, SAS Nagar, Mohali 140306 Punjab India
| | - Satyam Ravi
- Department of Chemical Sciences; Indian Institute of Science Education and Research Mohali; Knowledge City, Sector 81, SAS Nagar, Mohali 140306 Punjab India
| | - K. R. Shamasundar
- Department of Chemical Sciences; Indian Institute of Science Education and Research Mohali; Knowledge City, Sector 81, SAS Nagar, Mohali 140306 Punjab India
| | - Sanjay Singh
- Department of Chemical Sciences; Indian Institute of Science Education and Research Mohali; Knowledge City, Sector 81, SAS Nagar, Mohali 140306 Punjab India
| | - Dominic S. Wright
- Chemistry Department; Cambridge University; Lensfield Road Cambridge CB2 1EW UK
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17
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Benson CGM, Plajer AJ, García-Rodríguez R, Bond AD, Singh S, Gade LH, Wright DS. A versatile hard–soft N/S-ligand for metal coordination and cluster formation. Chem Commun (Camb) 2016; 52:9683-6. [DOI: 10.1039/c6cc04805f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The new ligand [S-P(μ-NtBu)]22− has adaptable hard–soft character with respect to the coordinated metal centre and can be used to construct large cage architectures.
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Affiliation(s)
| | - Alex J. Plajer
- Department of Chemistry
- University of Cambridge
- CB2 1EW Cambridge
- UK
| | | | - Andrew D. Bond
- Department of Chemistry
- University of Cambridge
- CB2 1EW Cambridge
- UK
| | - Sanjay Singh
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Mohali 140306
- India
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut der Universität Heidelberg
- 69120 Heidelberg
- Germany
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18
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Nordheider A, Woollins JD, Chivers T. Organophosphorus–Tellurium Chemistry: From Fundamentals to Applications. Chem Rev 2015; 115:10378-406. [DOI: 10.1021/acs.chemrev.5b00279] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Nordheider
- EaStCHEM
School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, United Kingdom
| | - J. Derek Woollins
- EaStCHEM
School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, United Kingdom
| | - Tristram Chivers
- Department
of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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19
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Shi YX, Liang RZ, Martin KA, Weston N, Gonzalez-Calera S, Ganguly R, Li Y, Lu Y, Ribeiro AJM, Ramos MJ, Fernandes PA, García F. Synthesis and Hydrolytic Studies on the Air-Stable [(4-CN-PhO)(E)P(μ-NtBu)]2 (E = O, S, and Se) Cyclodiphosphazanes. Inorg Chem 2015; 54:6423-32. [DOI: 10.1021/acs.inorgchem.5b00735] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan X. Shi
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Rong Z. Liang
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Katherine A. Martin
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Nicholas Weston
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | | | - Rakesh Ganguly
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Yongxin Li
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Yunpeng Lu
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - António J. M. Ribeiro
- Department of Chemistry and Biochemistry.
Faculty of Sciences, University of Porto, Rua do Campo Alegre, S/N, 4169-007 Porto, Portugal
| | - Maria J. Ramos
- Department of Chemistry and Biochemistry.
Faculty of Sciences, University of Porto, Rua do Campo Alegre, S/N, 4169-007 Porto, Portugal
| | - Pedro A. Fernandes
- Department of Chemistry and Biochemistry.
Faculty of Sciences, University of Porto, Rua do Campo Alegre, S/N, 4169-007 Porto, Portugal
| | - Felipe García
- School of Physical
and
Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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Nordheider A, Hüll K, Prentis JKD, Athukorala Arachchige KS, Slawin AMZ, Woollins JD, Chivers T. Main Group Tellurium Heterocycles Anchored by a P2VN2 Scaffold and Their Sulfur/Selenium Analogues. Inorg Chem 2015; 54:3043-54. [DOI: 10.1021/acs.inorgchem.5b00161] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Nordheider
- EaStCHEM School
of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
- Department
of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Katharina Hüll
- EaStCHEM School
of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | - Joanna K. D. Prentis
- EaStCHEM School
of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | | | - Alexandra M. Z. Slawin
- EaStCHEM School
of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | - J. Derek Woollins
- EaStCHEM School
of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | - Tristram Chivers
- Department
of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
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Nordheider A, Hüll K, Athukorala Arachchige KS, Slawin AMZ, Woollins JD, Thirumoorthi R, Chivers T. Spirocyclic, macrocyclic and ladder complexes of coinage metals and mercury with dichalcogeno P2N2-supported anions. Dalton Trans 2015; 44:5338-46. [DOI: 10.1039/c5dt00159e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reactions of the dianions [tBuN(E)P(μ-NtBu)]22− (E = Se,S) with M(i) reagents (M = Ag, Au) or HgCl2 produce complexes of [tBu(H)N(E)P(μ-NtBu)2P(E)NtBu]− with spirocyclic, macrocyclic or ladder structures.
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Affiliation(s)
- Andreas Nordheider
- School of Chemistry
- University of St Andrews
- St Andrews KY16 9ST
- UK
- Department of Chemistry
| | - Katharina Hüll
- School of Chemistry
- University of St Andrews
- St Andrews KY16 9ST
- UK
| | | | | | | | | | - Tristram Chivers
- Department of Chemistry
- University of Calgary
- Calgary
- T2N 1N4 Canada
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22
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Shi YX, Liang RZ, Martin KA, Star DG, Díaz J, Li XY, Ganguly R, García F. Steric C–N bond activation on the dimeric macrocycle [{P(μ-NR)}2(μ-NR)]2. Chem Commun (Camb) 2015; 51:16468-71. [DOI: 10.1039/c5cc06034f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dimeric macrocyclophosphazane [{P(μ-NtBu)}2(μ-NtBu)]2 ( 1) was reacted with elemental selenium. An unexpected C–N cleavage reaction occurred producing P4(μ-NtBu)3(μ-NH)3Se4 ( 2). The C–N bond cleavage is driven by the high steric ring strain present within the ring.
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Affiliation(s)
- Yan X. Shi
- School of Physical and Mathematical Sciences
- Division of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
| | - Rong Z. Liang
- School of Physical and Mathematical Sciences
- Division of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
| | - Katherine A. Martin
- School of Physical and Mathematical Sciences
- Division of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
| | - Daniel G. Star
- Chemistry Department
- University of Cambridge
- Cambridge CB2 1EW
- UK
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica
- Facultad de Veterinaria
- Universidad de Extremadura
- Cáceres 10071
- Spain
| | - Xin Y. Li
- School of Physical and Mathematical Sciences
- Division of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
| | - Rakesh Ganguly
- School of Physical and Mathematical Sciences
- Division of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
| | - Felipe García
- School of Physical and Mathematical Sciences
- Division of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
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23
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Balakrishna MS, Suresh D, Ananthnag GS, Mague JT. Quaternization and oxidation reactions of cyclodiphosphazane derivatives and their copper(I) and gold(I) complexes. Dalton Trans 2014; 43:8835-48. [PMID: 24780926 DOI: 10.1039/c4dt00801d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The reactions of cyclodiphosphazane derivatives cis-{(t)BuN(H)P(μ-N(t)Bu)2PN(H)(t)Bu} (1), cis-{MeN(C4H8N)P(μ-N(t)Bu)2P(NC4H8Me)} (2) and {(Me2NCH2CH2O)P(μ-N(t)Bu)2P(OCH2CH2NMe2)} (3) with methyl iodide and methyl triflate and their subsequent reactions with elemental sulfur and selenium are reported. Interestingly, the reactions of 1-3 with an excess of methyl iodide resulted in quaternising only one phosphorus atom in cis-[{(t)BuNHP(μ-N(t)Bu)2P(CH3)NH(t)Bu}](I) (4), two exocyclic nitrogen atoms and one of the phosphorus atoms in cis-{(Me2NC4H8N)P(μ-N(t)Bu)2P(CH3)(NC4H8NMe2)}](I)3 (7) and only two exocyclic nitrogen atoms in cis-[{(Me3NCH2CH2O)P(μ-N(t)Bu)2P(OCH2CH2NMe3)}](I)2 (8). The reaction of 1 with one equiv. of methyl triflate produced cis-[{(t)BuN(H)P(μ-N(t)Bu)2P(CH3)N(H)(t)Bu}]OTf (5), whereas the same reaction in a 1 : 2 molar ratio afforded cis-{(t)BuN(H)P(CH3)(μ-N(t)Bu)2P(CH3)N(H)(t)Bu}(OTf)2 (6). Compounds 4 and 5 showed poor solubility in water, whereas 7 and 8 were high melting crystalline solids with moderate to good water solubility. Treatment of 4 with either elemental sulfur or selenium gave both cis- and trans-chalcogenide derivatives. Similar reactions of 7 and 8 produced both mono- and bischalcogenides. Reactions between 4 or 7 and CuI yielded dinuclear complexes, cis-[{Cu2(μ-I)3((t)BuN(H)P)(μ-N(t)Bu)2(P(CH3)N(H)(t)Bu)]2}(I)] (15) and cis-[{Cu2(μ-I)3[(Me2NC4H8N)P(μ-N(t)Bu)2P(CH3)(NC4H8NMe2)]2}(I)5] (16), while the reaction of 8 with CuI produced a coordination polymer [{Cu2(μ-I)3(μ-N(t)BuP)2(OCH2CH2NMe3)2}I]∞ (17), containing triiodo-bridged [Cu2(μ-I)3] linkers. The molecular structures of several of these compounds were confirmed by single crystal X-ray diffraction studies. The Cu(I)···Cu(I) distance of 2.55 Å in 15 is quite short and is the same as that found in copper metal and also in complexes containing [Cu2(μ-I)3] linkers. All the metal complexes exhibit strong intra-, inter- or both intra- and inter-molecular hydrogen bonding interactions.
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Affiliation(s)
- Maravanji S Balakrishna
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India.
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Nordheider A, Chivers T, Thirumoorthi R, Athukorala Arachchige KS, Slawin AMZ, Woollins JD, Vargas-Baca I. A planar dianionic ditelluride and a cyclic tritelluride supported by P2N2rings. Dalton Trans 2013; 42:3291-4. [DOI: 10.1039/c2dt32716c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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25
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Nordheider A, Chivers T, Thirumoorthi R, Vargas-Baca I, Woollins JD. Planar P(6)E(6) (E = Se, S) macrocycles incorporating P(2)N(2) scaffolds. Chem Commun (Camb) 2012; 48:6346. [PMID: 22618573 DOI: 10.1039/c2cc32809g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Oxidation of alkali metal derivatives of the dianions [E((t)BuN)P(μ-N(t)Bu)(2)P(N(t)Bu)E](2-) (E = S, Se) with I(2) produces 15-membered macrocycles in which a planar P(6)E(6) motif is stabilised by perpendicular P(2)N(2) scaffolds.
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Affiliation(s)
- Andreas Nordheider
- Department of Chemistry, University of Calgary, Calgary, AB, Canada T2N 1N4.
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Schranz I, Stahl L. Syntheses of Group 14 bis(tert-butylamido)cyclodiphosph(III)azane dichlorides, and the solid-state structures of the silicon and tin derivatives. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2009.12.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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González-Calera S, Eisler D, Morey J, McPartlin M, Singh S, Wright D. The Selenium-Based Hexameric Macrocycle [(Se)P(μ-NtBu)2P(μ-Se)]6. Angew Chem Int Ed Engl 2008; 47:1111-4. [DOI: 10.1002/anie.200703981] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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González-Calera S, Eisler D, Morey J, McPartlin M, Singh S, Wright D. The Selenium-Based Hexameric Macrocycle [(Se)P(μ-NtBu)2P(μ-Se)]6. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200703981] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Chandrasekaran P, Mague JT, Balakrishna MS. Cyclodiphosphazanes with Hemilabile Ponytails: Synthesis, Transition Metal Chemistry (Ru(II), Rh(I), Pd(II), Pt(II)), and Crystal and Molecular Structures of Mononuclear (Pd(II), Rh(I)) and Bi- and Tetranuclear Rhodium(I) Complexes. Inorg Chem 2005; 44:7925-32. [PMID: 16241142 DOI: 10.1021/ic0509478] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclodiphosphazanes having hemilabile ponytails such as cis-[(t)()BuNP(OC(6)H(4)OMe-o)](2) (2), cis-[(t)()BuNP(OCH(2)CH(2)OMe)](2) (3), cis-[(t)BuNP(OCH(2)CH(2)SMe)](2) (4), and cis-[(t)BuNP(OCH(2)CH(2)NMe(2))](2) (5) were synthesized by reacting cis-[(t)()BuNPCl](2) (1) with corresponding nucleophiles. The reaction of 2 with [M(COD)Cl(2)] afforded cis-[MCl(2)(2)(2)] derivatives (M = Pd (6), Pt (7)), whereas, with [Pd(NCPh)(2)Cl(2)], trans-[MCl(2)(2)(2)] (8) was obtained. The reaction of 2 with [Pd(PEt(3))Cl(2)](2), [{Ru(eta(6)-p-cymene)Cl(2)](2), and [M(COD)Cl](2) (M = Rh, Ir) afforded mononuclear complexes of Pd(II) (9), Ru(II) (11), Rh(I) (12), and Ir(I) (13) irrespective of the stoichiometry of the reactants and the reaction condition. In the above complexes the cyclodiphosphazane acts as a monodentate ligand. The reaction of 2 with [PdCl(eta(3)-C(3)H(5))](2) afforded binuclear complex [(PdCl(eta(3)-C(3)H(5)))(2){((t)BuNP(OC(6)H(4)OMe-o))(2)-kappaP}] (10). The reaction of ligand 3 with [Rh(CO)(2)Cl](2) in 1:1 ratio in CH(3)CN under reflux condition afforded tetranuclear rhodium(I) metallamacrocycle (14), whereas the ligands 4 and 5 afforded bischelated binuclear complexes 15 and 16, respectively. The crystal structures of 8, 9, 12, 14, and 16 are reported.
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Affiliation(s)
- P Chandrasekaran
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai
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31
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Chandrasekaran P, Mague JT, Balakrishna MS. Tetranuclear Rhodium(I) Macrocycle Containing Cyclodiphosphazane [Rh2(μ-Cl)2(CO)2{(tBuNP(OC6H4OMe-o))2-κP]2 and Its Reversible Conversion into trans-[Rh(CO)Cl{(tBuNP(OC6H4OMe-o))2-κP}2]. Organometallics 2005. [DOI: 10.1021/om0502537] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- P. Chandrasekaran
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India, and Department of Chemistry, Tulane University, New Orleans, Louisiana 70118
| | - Joel T. Mague
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India, and Department of Chemistry, Tulane University, New Orleans, Louisiana 70118
| | - Maravanji S. Balakrishna
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India, and Department of Chemistry, Tulane University, New Orleans, Louisiana 70118
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32
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Chivers T. Recent Studies of Multiply Bonded Selenium and Tellurium Compounds. PHOSPHORUS SULFUR 2005. [DOI: 10.1080/10426500590907408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tristram Chivers
- a Department of Chemistry, The University of Calgary , Calgary , Alberta , Canada
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Lief GR, Moser DF, Stahl L, Staples RJ. Syntheses and crystal structures of mono- and bi-metallic zinc compounds of symmetrically- and asymmetrically-substituted bis(amino)cyclodiphosph(V)azanes. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.01.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Abstract
The first transition-metal (Rh(I), Mo(VI), Ni(II)) complexes of S[double bond, length as m-dash]P(NHBu(t))(3) have been synthesized via metathetical reactions of mono-lithiated and [Rh(CO)(2)Cl](2), (Bu(t)N)(2)MoCl(2)(dme) and NiBr(2)(dme). Surprisingly in the molecular structure of the Ni(II)-complex both hard-soft (N,S) and hard-hard (N,N[prime or minute]) chelation modes of are realized.
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Affiliation(s)
- Konstantin A Rufanov
- Institut fur Chemie, Humboldt Universitat zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany.
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Chivers T, Krahn M, Schatte G, Parvez M. Lithiation of tris(alkyl- and arylamido)orthophosphates EP[N(H)R]3 (E = O, S, Se): imido substituent effects and P=E bond cleavage. Inorg Chem 2003; 42:3994-4005. [PMID: 12817955 DOI: 10.1021/ic034151p] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the solid state, OP[N(H)Me](3) (1a) and OP[N(H)(t)Bu](3) (1b) have hydrogen-bonded structures that exhibit three-dimensional and one-dimensional arrays, respectively. The lithiation of 1b with 1 equiv of (n)BuLi generates the trimeric monolithiated complex (THF)[LiOP(N(t)Bu)[N(H)(t)Bu](2)](3) (4), whereas reaction with an excess of (n)BuLi produces the dimeric dilithium complex [(THF)(2)Li(2)OP(N(t)Bu)(2)[N(H)(t)Bu]](2) (5). Complex 4 contains a Li(2)O(2) ring in an open-ladder structure, whereas 5 embraces a central Li(2)O(2) ring in a closed-ladder arrangement. Investigations of the lithiation of tris(alkyl or arylamido)thiophosphates, SP[N(H)R](3) (2a, R = (i)Pr; 2b, R = (t)Bu; 2c, R = p-tol) with (n)BuLi reveal interesting imido substituent effects. For the alkyl derivatives, only mono- or dilithiation is observed. In the case of R = (t)Bu, lithiation is accompanied by P-S bond cleavage to give the dilithiated cyclodiphosph(V/V)azane [(THF)(2)Li(2)[((t)BuN)(2)P(micro-N(t)Bu)(2)P(N(t)Bu)(2)]] (9). Trilithiation occurs for the triaryl derivatives EP[N(H)Ar](3) (E = S, Ar = p-tolyl; E = Se, Ar = Ph), as demonstrated by the preparation of [(THF)(4)Li(3)[SP(Np-tol)(3)]](2) (10) and [(THF)(4)Li(3)[SeP(NPh)(3)]](2) (11), which are accompanied by the formation of small amounts of 10.[LiOH(THF)](2) and 11.Li(2)Se(2)(THF)(2), respectively.
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Affiliation(s)
- Tristram Chivers
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4.
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Briand GG, Chivers T, Krahn M, Parvez M. Synthesis and X-ray structures of dilithium complexes of the phosphonate anions [PhP(E)(N(t)Bu)(2)](2-) (E = O, S, Se, Te) and dimethylaluminum derivatives of [PhP(E)(N(t)Bu)(NH(t)Bu)](-) (E = S, Se). Inorg Chem 2002; 41:6808-15. [PMID: 12470078 DOI: 10.1021/ic020471h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dilithium salts of the phosphonate dianions [PhP(E)(N(t)Bu)(2)](2-) (E = O, S, Se) are generated by the lithiation of [PhP(E)(NH(t)Bu)(2)] with n-butyllithium. The formation of the corresponding telluride (E = Te) is achieved by oxidation of [Li(2)[PhP(N(t)Bu)(2)]] with tellurium. X-ray structural determinations revealed dimeric structures [Li(THF)(2)[PhP(E)(N(t)Bu)(2)]](2) in which the monomeric units are linked by Li-E bonds. In the case of E = Se or Te, but not for E = S, transannular Li-E interactions are also observed, resulting in a six-rung ladder. By contrast, for E = O, this synthetic approach yields the Li(2)O-templated tetramer [(THF)Li(2)[PhP(O)(N(t)Bu)(2)]](4).Li(2)O in THF or the tetramer [(Et(2)O)(0.5)Li(2)[PhP(O)(N(t)Bu)(2)]](4) in diethyl ether. The reaction of trimethylaluminum with PhP(E)(NH(t)Bu)(2) produces the complexes Me(2)Al[PhP(E)(N(t)Bu)(NH(t)Bu)] (E = S, Se), which were shown by X-ray crystallography to be N,E-chelated monomers.
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Affiliation(s)
- Glen G Briand
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
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Chivers T, Krahn M, Schatte G. Syntheses and X-ray structures of potassium derivatives and a paramagnetic nickel(II) complex of a cyclodiphosph(III/V)azane monoselenide. Inorg Chem 2002; 41:4348-54. [PMID: 12184750 DOI: 10.1021/ic020167o] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cyclodiphosph(III/V)azane monoselenide [(t)Bu(H)N(Se)P(micro-N(t)Bu)(2)PN(H)(t)Bu] (6, H(2)cdppSe where cdpp = cyclodiphosphazane) is obtained in quantitative yield from the comproportionation reaction of equimolar amounts of H(2)cdpp (7) and H(2)cdppSe(2) (3) in toluene at 85 degrees C. The X-ray structures of 3 and 6 reveal that both the monoselenide and the diselenide adopt a cis,endo,exo arrangement of the (t)BuNH groups. Metalation of 6 with 1 equiv of KO(t)Bu or 2 equiv of KCH(2)Ph in THF produces [(THF)K[HcdppSe]](2) (8) or [[(THF)(2)K](2)[cdppSe]](2) (9), respectively. The initial deprotonation involves the (t)BuNH group attached to the P(V) center in 6. In the dimeric structure of 8, both of the monoanionic ligands are bis-N,Se-chelated to the two K(+) cations to give a distorted K(2)N(2)Se(2) octahedron. In the centrosymmetric dimer 9, the dianionic ligands adopt two different coordination modes to the bis-solvated K(+) ions, viz., tridentate N,N',N" coordination and N,Se-chelation involving both exo- and endocyclic nitrogen atoms. The dimer is linked through K-Se interactions. The reaction of 2 equiv of 8 with NiCl(2)(PMe(3))(2) in THF produces [Ni(HcdppSe)(2)], which has a distorted tetrahedral structure and exhibits anomalous (1)H, (13)C, and (31)P NMR chemical shifts owing to the proximity of the paramagnetic Ni(II) center.
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Affiliation(s)
- Tristram Chivers
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4.
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