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Krivdin LB. Computational NMR of heavy nuclei involving 109Ag, 113Cd, 119Sn, 125Te, 195Pt, 199Hg, 205Tl, and 207Pb. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4976] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Batista PR, Ducati LC, Autschbach J. Solvent effect on the 195Pt NMR properties in pyridonate-bridged Pt III dinuclear complex derivatives investigated by ab initio molecular dynamics and localized orbital analysis. Phys Chem Chem Phys 2021; 23:12864-12880. [PMID: 34075921 DOI: 10.1039/d0cp05849a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An ab initio molecular dynamics investigation of the solvent effect (water) on the structural parameters, 195Pt NMR spin-spin coupling constants (SSCCs) and chemical shifts of a series of pyridonate-bridged PtIII dinuclear complexes is performed using Kohn-Sham (KS) Car-Parrinello molecular dynamics (CPMD) and relativistic hybrid KS NMR calculations. The indirect solvent effect (via structural changes) has a dramatic effect on the 1JPtPt SSCCs. The complexes exhibit a strong trans influence in solution, where the Pt-Pt bond lengthens with increasing axial ligand σ-donor strength. In the diaqua complex, where the solvent effect is more pronounced, the SSCCs averaged for CPMD configurations with explicit plus implicit solvation agree much better with the experimental data, while the calculations for static geometry and CPMD unsolvated configurations show large deviations with respect to experiment. The combination of CPMD with hybrid KS NMR calculations provides a much more realistic computational model that reproduces the large magnitudes of 1JPtPt and 195Pt chemical shifts. An analysis of 1JPtPt in terms of localized and canonical orbitals shows that the SSCCs are driven by changes in the s-character of the natural atomic orbitals of Pt atoms, which affect the 'Fermi contact' mechanism.
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Affiliation(s)
- Patrick R Batista
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil.
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Castro AC, Fliegl H, Cascella M, Helgaker T, Repisky M, Komorovsky S, Medrano MÁ, Quiroga AG, Swart M. Four-component relativistic 31P NMR calculations for trans-platinum(ii) complexes: importance of the solvent and dynamics in spectral simulations. Dalton Trans 2019; 48:8076-8083. [PMID: 30916692 DOI: 10.1039/c9dt00570f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report a combined experimental-theoretical study on the 31P NMR chemical shift for a number of trans-platinum(ii) complexes. Validity and reliability of the 31P NMR chemical shift calculations are examined by comparing with the experimental data. A successful computational protocol for the accurate prediction of the 31P NMR chemical shifts was established for trans-[PtCl2(dma)PPh3] (dma = dimethylamine) complexes. The reliability of the computed values is shown to be critically dependent on the level of relativistic effects (two-component vs. four component), choice of density functionals, dynamical averaging, and solvation effects. Snapshots obtained from ab initio molecular dynamics simulations were used to identify those solvent molecules which show the largest interactions with the platinum complex, through inspection by using the non-covalent interaction program. We observe satisfactory accuracy from the full four-component matrix Dirac-Kohn-Sham method (mDKS) based on the Dirac-Coulomb Hamiltonian, in conjunction with the KT2 density functional, and dynamical averaging with explicit solvent molecules.
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Affiliation(s)
- Abril C Castro
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17003, Girona, Spain.
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Hayashi S, Nishide T, Nakanishi W, Saito M. Relativistic Effect on 1 J(M,C) in Me 4 M, Me 3 M - , Ph 4 M, and Ph 3 M - (M=Pb, Sn, Ge, Si, and/or C): Role of s-Type Lone Pair Orbitals in the Distinct Effect for the Anionic Species. Chemphyschem 2017; 18:2466-2474. [PMID: 28691742 DOI: 10.1002/cphc.201700755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Indexed: 11/12/2022]
Abstract
Indirect one-bond nuclear spin-spin couplings between M and C [1 J(M,C)] in Me4 M, Me3 M- , Ph4 M, and Ph3 M- (M=Pb, Sn, Ge, Si, C) are analyzed with consideration of the relativistic effect and by employing Slater-type basis sets. The evaluated total values 1 JTL (M,C) reproduced the observed values with some systematic calculation errors. Fermi contact terms 1 JFC (M,C) contribute predominantly to 1 JTL (M,C) (≈99 %). A distinct relativistic effect on 1 J(Pb,C) is predicted for Me3 Pb- and Ph3 Pb- . The mechanisms for the distinct effect are elucidated by using the comparison between Me3 Pb- and Me4 Pb as an example. The contributions to 1 JFC (M,C) [or 1 JSD+FC (M,C), where SD denotes the spin-dipolar term] are decomposed into those of occupied orbitals and occupied-to-unoccupied transitions. The s-type lone-pair orbitals are demonstrated to contribute to the distinct relativistic effect on 1 J(Pb,C) of Me3 Pb- (and Ph3 Pb- ). The results are in sharp contrast to the cases of 1 J(M,C) for M atoms lighter than Pb, such as Si, and are explained by the s character of the M-C bonds. This treatment enables visualization and clear recognition the origin of the nuclear couplings for the species exhibiting a relativistic effect.
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Affiliation(s)
- Satoko Hayashi
- Department of Material Science and Chemistry, Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama, 640-8510, Japan
| | - Taro Nishide
- Department of Material Science and Chemistry, Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama, 640-8510, Japan
| | - Waro Nakanishi
- Department of Material Science and Chemistry, Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama, 640-8510, Japan
| | - Masaichi Saito
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama, 338-8570, Japan
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Ducati LC, Marchenko A, Autschbach J. NMR J-Coupling Constants of Tl–Pt Bonded Metal Complexes in Aqueous Solution: Ab Initio Molecular Dynamics and Localized Orbital Analysis. Inorg Chem 2016; 55:12011-12023. [DOI: 10.1021/acs.inorgchem.6b02180] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lucas C. Ducati
- Department
of Fundamental Chemistry Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, São Paulo, SP 05508-000, Brazil
| | - Alex Marchenko
- Department of Chemistry University at Buffalo State, University of New York, Buffalo, New York 14260-3000, United States
| | - Jochen Autschbach
- Department of Chemistry University at Buffalo State, University of New York, Buffalo, New York 14260-3000, United States
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6
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Garbacz P. Nuclear relaxation in an electric field enables the determination of isotropic magnetic shielding. J Chem Phys 2016. [DOI: 10.1063/1.4960178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Benedetti M, De Castro F, Fanizzi FP. Square-Planar PtIIversus Octahedral PtIVHalido Complexes:195Pt NMR Explained by a Simple Empirical Approach. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600573] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Michele Benedetti
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali; Università del Salento; Via Monteroni 73100 Lecce Italy
| | - Federica De Castro
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali; Università del Salento; Via Monteroni 73100 Lecce Italy
| | - Francesco P. Fanizzi
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali; Università del Salento; Via Monteroni 73100 Lecce Italy
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Wodyński A, Malkina OL, Pecul M. The Relativistic Effects on the Carbon-Carbon Coupling Constants Mediated by a Heavy Atom. J Phys Chem A 2016; 120:5624-34. [PMID: 27177252 DOI: 10.1021/acs.jpca.5b10258] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The (2)JCC, (3)JCC, and (4)JCC spin-spin coupling constants in the systems with a heavy atom (Cd, In, Sn, Sb, Te, Hg, Tl, Pb, Bi, and Po) in the coupling path have been calculated by means of density functional theory. The main goal was to estimate the relativistic effects on spin-spin coupling constants and to explore the factors which may influence them, including the nature of the heavy atom and carbon hybridization. The methods applied range, in order of reduced complexity, from the Dirac-Kohn-Sham (DKS) method (density functional theory with four-component Dirac-Coulomb Hamiltonian), through DFT with two- and one-component zeroth-order regular approximation (ZORA) Hamiltonians, to scalar effective core potentials (ECPs) with the nonrelativistic Hamiltonian. The use of DKS and ZORA methods leads to very similar results, and small-core ECPs of the MDF and MWB variety reproduce correctly the scalar relativistic effects. Scalar relativistic effects usually are larger than the spin-orbit coupling effects. The latter tend to influence the most the coupling constants of the sp(3)-hybridized carbon atoms and in compounds of the p-block heavy atoms. Large spin-orbit coupling contributions for the Po compounds are probably connected with the inverse of the lowest triplet excitation energy.
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Affiliation(s)
- Artur Wodyński
- Faculty of Chemistry, University of Warsaw , ul. Pasteura 1, 02-093 Warszawa, Poland
| | - Olga L Malkina
- Institute of Inorganic Chemistry, Slovak Academy of Sciences , Dubravska cesta 9, SK-84536 Bratislava, Slovak Republic.,Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University , SK-84215 Bratislava, Slovakia
| | - Magdalena Pecul
- Faculty of Chemistry, University of Warsaw , ul. Pasteura 1, 02-093 Warszawa, Poland
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Di Remigio R, Bast R, Frediani L, Saue T. Four-Component Relativistic Calculations in Solution with the Polarizable Continuum Model of Solvation: Theory, Implementation, and Application to the Group 16 Dihydrides H2X (X = O, S, Se, Te, Po). J Phys Chem A 2014; 119:5061-77. [DOI: 10.1021/jp507279y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roberto Di Remigio
- Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Tromsø
, N-9037 Tromsø, Norway
| | - Radovan Bast
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, AlbaNova University Center
, S-10691 Stockholm, Sweden
- PDC Center for High Performance Computing, Royal Institute of Technology
, S-10044 Stockholm, Sweden
| | - Luca Frediani
- Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Tromsø
, N-9037 Tromsø, Norway
| | - Trond Saue
- Laboratoire de Chimie et Physique Quantiques (UMR 5626), CNRS/Université de Toulouse III (Paul Sabatier)
, 118 route de Narbonne, 31062 Toulouse, France
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10
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Kauch M, Pecul M. What factors influence the metal-proton spin-spin coupling constants in mercury- and cadmium-substutited rubredoxin? J Phys Chem A 2014; 118:4471-9. [PMID: 24884758 DOI: 10.1021/jp501888c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The indirect metal-proton spin-spin coupling constants between protons in cysteine groups and the mercury or cadmium nucleus have been calculated for a small model of Me-rubredoxin complex (Me = Cd, Hg) by means of density functional theory with zeroth-order regular approximation Hamiltonian (DFT-ZORA). The calculated spin-spin coupling constants, in spite of the moderate size of the model system, are in good agreement with the values measured in NMR experiment, which are in the 0.29-0.56 Hz range for the Cd complex and in the 0.57-2.20 Hz range for the Hg complex. The robustness of the chosen method has been verified by calculations with a number of different exchange-correlation functionals and basis sets. Additionally, it has been shown that the short- and long-distance metal-proton coupling constants are affected mainly by the values of the metal-proton distance and the H-N-C-C dihedral angle.
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Affiliation(s)
- Małgorzata Kauch
- Faculty of Chemistry, University of Warsaw , Pasteura 1, 02-093 Warszawa, Poland
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Kornecki KP, Briones JF, Boyarskikh V, Fullilove F, Autschbach J, Schrote KE, Lancaster KM, Davies HML, Berry JF. Direct Spectroscopic Characterization of a Transitory Dirhodium Donor-Acceptor Carbene Complex. Science 2013; 342:351-4. [DOI: 10.1126/science.1243200] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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12
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Wodyński A, Repiský M, Pecul M. A comparison of two-component and four-component approaches for calculations of spin-spin coupling constants and NMR shielding constants of transition metal cyanides. J Chem Phys 2012; 137:014311. [DOI: 10.1063/1.4730944] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Kauch M, Pecul M. Spin-Spin Artificial DNA Intercalated with Silver Cations: Theoretical Prediction. Chemphyschem 2012; 13:1332-8. [DOI: 10.1002/cphc.201100846] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 01/20/2012] [Indexed: 11/07/2022]
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14
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Purgel M, Maliarik M, Glaser J, Platas-Iglesias C, Persson I, Tóth I. Binuclear Pt–Tl Bonded Complex with Square Pyramidal Coordination around Pt: A Combined Multinuclear NMR, EXAFS, UV–Vis, and DFT/TDDFT Study in Dimethylsulfoxide Solution. Inorg Chem 2011; 50:6163-73. [DOI: 10.1021/ic200417q] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mihály Purgel
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, Egyetem tér 1, Debrecen H-4010, Hungary
- Research group of Homogeneous Catalysis, MTA-DE, University of Debrecen, Egyetem tér 1, Debrecen H-4032, Hungary
| | - Mikhail Maliarik
- Outotec (Sweden) AB, Gymnasievägen 14, P.O. Box 745, SE-031 27 Skellefteå, Sweden
| | - Julius Glaser
- Department of Chemistry, The Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden
| | - Carlos Platas-Iglesias
- Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira, Alejandro de la Sota 1, 15008 A Coruña, Spain
| | - Ingmar Persson
- Department of Chemistry, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden
| | - Imre Tóth
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, Egyetem tér 1, Debrecen H-4010, Hungary
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15
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Sutter K, Truflandier LA, Autschbach J. NMR J-coupling constants in cisplatin derivatives studied by molecular dynamics and relativistic DFT. Chemphyschem 2011; 12:1448-55. [PMID: 21381179 DOI: 10.1002/cphc.201000997] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Indexed: 11/06/2022]
Abstract
Solvent effects on J((195)Pt-(15)N) one-bond nuclear spin-spin coupling constants (J(PtN)) of cisplatin [cis-diamminedichloroplatinum(II)] and three cisplatin derivatives are investigated using a combination of density functional theory (DFT) based ab initio molecular dynamics (aiMD) and all-electron relativistic DFT NMR calculations employing the two-component relativistic zeroth-order regular approximation (ZORA). Good agreement with experiment is obtained when explicit solvent molecules are considered and when the computations are performed with a hybrid functional. Spin-orbit coupling causes only small effects on J(PtN) . Key factors contributing to the magnitude of coupling constants are elucidated, with the most significant being the presence of solvent as well as the quality of the density functional and basis set combination. The solvent effects are of the same magnitude as J(PtN) calculated for gas-phase geometries. However, the trends of J(PtN) among the complexes are already present in the gas phase. Results obtained with a continuum solvent model agree quite well with the aiMD results, provided that the Pt solvent-accessible radius is carefully chosen. The aiMD results support the existence of a partial hydrogen-bond-like inverse-hydration-type interaction affording a weak (1)J(Pt⋅⋅⋅H(w)) coupling between the complexes and the coordinating water molecule.
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Affiliation(s)
- Kiplangat Sutter
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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TSIPIS CONSTANTINOSA. ADVENTURES OF QUANTUM CHEMISTRY IN THE REALM OF INORGANIC CHEMISTRY. COMMENT INORG CHEM 2010. [DOI: 10.1080/02603590490486680] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Relativistic Effects on Magnetic Resonance Parameters and Other Properties of Inorganic Molecules and Metal Complexes. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/978-1-4020-9975-5_12] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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18
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Moncho S, Autschbach J. Relativistic Zeroth-Order Regular Approximation Combined with Nonhybrid and Hybrid Density Functional Theory: Performance for NMR Indirect Nuclear Spin−Spin Coupling in Heavy Metal Compounds. J Chem Theory Comput 2009; 6:223-34. [DOI: 10.1021/ct900535d] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Salvador Moncho
- Departament de Química, Universitat Autonoma de Barcelona, 08193 Cerdanyola del Vallés, Spain
| | - Jochen Autschbach
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000
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Boshaala AMA, Simpson SJ, Autschbach J, Zheng S. Synthesis and Characterization of the Trihalophosphine Compounds of Ruthenium [RuX2(η6-cymene)(PY3)] (X = Cl, Br, Y = F, Cl, Br) and the Related PF2(NMe2) and P(NMe2)3 Compounds; Multinuclear NMR Spectroscopy and the X-ray Single Crystal Structures of [RuBr2(η6-cymene)(PF3)], [RuBr2(η6-cymene)(PF2{NMe2})], and [RuI2(η6-cymene)(P{NMe2}3)]. Inorg Chem 2008; 47:9279-92. [DOI: 10.1021/ic800611h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ahmed M. A. Boshaala
- Institute of Materials Research, University of Salford, Salford M5 4WT, U.K., School of Biosciences, University of Exeter, 216B Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, U.K., and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000
| | - Stephen J. Simpson
- Institute of Materials Research, University of Salford, Salford M5 4WT, U.K., School of Biosciences, University of Exeter, 216B Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, U.K., and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000
| | - Jochen Autschbach
- Institute of Materials Research, University of Salford, Salford M5 4WT, U.K., School of Biosciences, University of Exeter, 216B Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, U.K., and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000
| | - Shaohui Zheng
- Institute of Materials Research, University of Salford, Salford M5 4WT, U.K., School of Biosciences, University of Exeter, 216B Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, U.K., and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000
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20
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Maliarik M, Plyusnin VF, Grivin VP, Tóth I, Glaser J. Photoinduced Electron Transfer via Nonbuttressed Metal−Metal Bonds. The Photochemical Study of Binuclear Complexes with Platinum−Thallium Bonds. J Phys Chem A 2008; 112:5786-93. [DOI: 10.1021/jp7121278] [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]
Affiliation(s)
- Mikhail Maliarik
- IFM-Department of Chemistry, Linköping University, S-581 83 Linköping, Sweden, Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia, Department of Inorganic and Analytical Chemistry, University of Debrecen, Hungary, and Department of Chemistry, Royal Institute of Technology (KTH), Stockholm, Sweden
| | - Victor F. Plyusnin
- IFM-Department of Chemistry, Linköping University, S-581 83 Linköping, Sweden, Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia, Department of Inorganic and Analytical Chemistry, University of Debrecen, Hungary, and Department of Chemistry, Royal Institute of Technology (KTH), Stockholm, Sweden
| | - Vjacheslav P. Grivin
- IFM-Department of Chemistry, Linköping University, S-581 83 Linköping, Sweden, Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia, Department of Inorganic and Analytical Chemistry, University of Debrecen, Hungary, and Department of Chemistry, Royal Institute of Technology (KTH), Stockholm, Sweden
| | - Imre Tóth
- IFM-Department of Chemistry, Linköping University, S-581 83 Linköping, Sweden, Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia, Department of Inorganic and Analytical Chemistry, University of Debrecen, Hungary, and Department of Chemistry, Royal Institute of Technology (KTH), Stockholm, Sweden
| | - Julius Glaser
- IFM-Department of Chemistry, Linköping University, S-581 83 Linköping, Sweden, Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia, Department of Inorganic and Analytical Chemistry, University of Debrecen, Hungary, and Department of Chemistry, Royal Institute of Technology (KTH), Stockholm, Sweden
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21
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Autschbach J. Density functional theory applied to calculating optical and spectroscopic properties of metal complexes: NMR and optical activity. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2007.02.012] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
This critical review highlights the progress in (195)Pt NMR over the last 25 years. In particular, some of the recent applications of (195)Pt NMR in catalytic and mechanistic studies, intermetallics and drug binding studies are discussed. (195)Pt NMR chemical shifts obtained from both theoretical studies and experiments are presented for Pt(0), Pt(II), Pt(III) and Pt(IV) complexes. (195)Pt coupling with various nuclei (viz. coupling constants) have also been collected in addition to data on (195)Pt relaxation. The latest developments in the theoretical knowledge and experimental advances have made (195)Pt NMR into a rich source of information in many fields. (164 references.).
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Affiliation(s)
- Brett M Still
- Nanoscale Organisation and Dynamics Group, College of Health and Science, University of Western Sydney, Penrith South DC, NSW 1797, Australia
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23
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de Silva N, Fry CG, Dahl LF. Phosphine-ligated induced formation of thallium(i) “full” Pt3TlPt3sandwich versus “open-face” TlPt3sandwich with triangular Pt3(µ2-CO)3(PR3)3units: synthesis and structural/spectroscopic analysis of triphenylphosphine [(µ3-Tl)Pt3(µ2-CO)3(PPh3)3]+and its (µ3-AuPPh3)Pt3analogue. Dalton Trans 2006:1051-9. [PMID: 16474891 DOI: 10.1039/b510373h] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This research constitutes an operational test to assess the influence of platinum-attached phosphine ligands in the formation process of "open-face" TlPt3 or "full" Pt3TlPt3 sandwich clusters. Accordingly, the reaction of TlPF6 with triphenylphosphine Pt4(mu2-CO)5(PPh3)4, under essentially identical boundary conditions originally used to prepare (90% yield) the triethylphosphine "full" Pt3TlPt3 sandwich, [(mu6-Tl)Pt6(mu2-CO)6(PEt3)6]+ (3) ([PF6]- salt), from Pt4(mu2-CO)5(PEt3)4 was carried out to see whether it would likewise afford the unknown triphenylphosphine Pt3TlPt3 sandwich analogue of or whether the change of phosphine ligands from sterically smaller, more basic PEt3 to PPh3 would cause the product to be the corresponding unknown triphenylphosphine "open-face" TlPt3 sandwich that would geometrically resemble the known bulky tricyclohexylphosphine [(mu3-Tl)Pt3(mu2-CO)3(PCy3)3]+ sandwich (2a). Both the structure and composition of the resulting "open-face" sandwich product, [(mu3-Tl)Pt3(mu2-CO)3(PPh3)3]+ (1a) ([PF6]- salt), were unequivocally established from a low-temperature CCD X-ray crystallographic determination. The calculated Pt/Tl atom ratio (3/1) of 75%/25% is in excellent agreement with that of 72(3)%/28(5)% obtained from energy-resolved measurements on a single crystal with a scanning electron microscope. Crystals (80% yield) of the orange-red were characterized by solid-state/solution IR and variable temperature 205Tl and 31P{1H} NMR spectra; the 31P{1H} spectra provide convincing evidence that is exhibiting dynamic behavior at room temperature in CDCl3 solution. The corresponding new "open-face" (mu3-AuPPh3)Pt3 sandwich, [(mu3-AuPPh3)Pt3(mu2-CO)3(PPh3)3]+ (1b) ([PF6]- salt), was quantitatively obtained from by reaction with AuPPh3Cl and spectroscopically characterized by IR and 31P{1H} NMR spectra. A comparative geometrical evaluation of the observed steric dispositions of the platinum-attached PR3 ligands in the "open-face" (mu3-Tl)Pt3 sandwiches of (with PPh3) and the known (with PCy3) and in the known "full" Pt3TlPt3 sandwich of (with PEt3) along with the considerably different observed steric dispositions of the PR(3) ligands in the known "open-face" (mu3-AuPCy3)Pt3 sandwich of (with PCy3) and in the known "full" Pt3AuPt3 sandwich of (with PPh(3)) has been performed. The results clearly indicate that, in contradistinction to the known triphenylphosphine Pt3AuPt3 sandwich of , PPh3 and bulkier PCy3 ligands of Pt3(mu2-CO)3(PR3)3 units are sterically too large to form "full" Pt3TlPt3 sandwiches. In other words, the nature of the thallium(I) sandwich-product in these reactions is sterically controlled by size effects of the phosphine ligands. Comparative examination of bridging carbonyl IR frequencies of and with those of closely related "open-face" and "full" sandwiches provides better insight concerning the relative electrophilic capacities of Tl+, Au+, and [AuPR3]+ components in forming sandwich adducts with Pt3(mu2-CO)3(PR3)3 nucleophiles.
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Affiliation(s)
- Namal de Silva
- University of Wisconsin-Madison, Department of Chemistry, 1101 University Avenue, Madison, WI 53706, USA
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Solans-Monfort X, Eisenstein O. DFT calculations of NMR JC–H coupling constants: An additional tool to characterize the α-agostic interaction in high oxidation state M-alkylidene complexes (M=Re, Mo and Ta). Polyhedron 2006. [DOI: 10.1016/j.poly.2005.08.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Le Guennic B, Neugebauer J, Reiher M, Autschbach J. The ?Invisible?13C NMR Chemical Shift of the Central Carbon Atom in [(Ph3PAu)6C]2+: A Theoretical Investigation. Chemistry 2005; 11:1677-86. [PMID: 15669075 DOI: 10.1002/chem.200400317] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The experimental 13C NMR chemical shift of the central carbon atom in the octahedral [(Ph3PAu)6C]2+ cluster was investigated on the basis of relativistic density functional calculations. In order to arrive at independent model conclusions regarding the value of the chemical shift, a systematic study of the dependence of the cluster structure on the phosphine ligands, the chosen density functionals, and the basis set size was conducted. The best structures obtained were then used in the NMR calculations. Because of the cage-like cluster structure a pronounced deshielding of the central carbon nucleus could have been expected. However, upon comparison with the 13C NMR properties of the related complex [C{Au[P(C6H5)2(p-C6H4NMe2)]}6]2+, Schmidbaur et al. have assigned a signal at delta=135.2 ppm to the interstitial carbon atom. Our calculations confirm this value in the region of the aromatic carbon atoms of the triphenylphosphine ligands. The close-lying signals of the 108 phenyl carbon atoms can explain the difficulties of assigning them experimentally.
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Affiliation(s)
- Boris Le Guennic
- Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, NY 14260-3000, USA
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26
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Ma G, Kritikos M, Maliarik M, Glaser J. Modification of Binuclear Pt−Tl Bonded Complexes by Attaching Bipyridine Ligands to the Thallium Site. Inorg Chem 2004; 43:4328-40. [PMID: 15236546 DOI: 10.1021/ic034571e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Complex formation of monomeric thallium(III) species with 2,2'-bipyridine (bipy) in dimethyl sulfoxide (dmso) and acetonitrile solutions was studied by means of multinuclear ((1)H, (13)C, and (205)Tl) NMR spectroscopy. For the first time, NMR signals of the individual species [Tl(bipy)(m)(solv)](3+) (m = 1-3) were observed despite intensive ligand and solvent exchange processes. The tris(bipy) complex was crystallized as [Tl(bipy)(3)(dmso)](ClO(4))(3)(dmso)(2) (1), and its crystal structure determined. In this compound, thallium is seven-coordinated; it is bonded to six nitrogen atoms of the three bipy molecules and to an oxygen atom of dmso. Metal-metal bonded binuclear complexes [(NC)(5)Pt-Tl(CN)(n)(solv)](n)(-) (n = 0-3) have been modified by attaching bipy molecules to the thallium atom. A reaction between [(NC)(5)Pt-Tl(dmso)(4)](s) and 2,2'-bipyridine in dimethyl sulfoxide solution results in the formation of a new complex, [(NC)(5)Pt-Tl(bipy)(solv)]. The presence of a direct Pt-Tl bond in the complex is convincingly confirmed by a very strong one-bond (195)Pt-(205)Tl spin-spin coupling ((1)J((195)Pt-(205)Tl) = 64.9 kHz) detected in both (195)Pt and (205)Tl NMR spectra. In solutions containing free cyanide, coordination of CN(-) to the thallium atom occurs, and the complex [(NC)(5)Pt-Tl(bipy)(CN)(solv)](-) ((1)J((195)Pt-(205)Tl) = 50.1 kHz) is formed as well. Two metal-metal bonded compounds containing bipy as a ligand were crystallized and their structures determined by X-ray diffractometry: [(NC)(5)Pt-Tl(bipy)(dmso)(3)] (2) and [(NC)(5)Pt-Tl(bipy)(2)] (3). The Pt-Tl bonding distances in the compounds, 2.6187(7) and 2.6117(5) A, respectively, are among the shortest reported separations between these two metals. The corresponding force constants in the molecules, 1.38 and 1.68 N/cm, respectively, were calculated using Raman stretching frequencies of the Pt-Tl vibrations and are characteristic for a single metal-metal bond. Electronic absorption spectra were recorded for the [(NC)(5)Pt-Tl(bipy)(m)(solv)] compounds, and the optical transition was attributed to the metal-metal bond assigned.
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Affiliation(s)
- Guibin Ma
- Department of Chemistry, Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden
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27
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Malkina OL, Malkin VG. Visualization of Nuclear Spin-Spin Coupling Pathways by Real-Space Functions. Angew Chem Int Ed Engl 2003; 42:4335-8. [PMID: 14502704 DOI: 10.1002/anie.200351713] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Olga L Malkina
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 84536 Bratislava, Slovakia.
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28
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Janzen MC, Jennings MC, Puddephatt RJ. Oxidative addition of Ph2TeCl2 to a dimethylplatinum(II) complex: effects of secondary bonding in the platinum-tellurium products. Inorg Chem 2003; 42:4553-8. [PMID: 12870944 DOI: 10.1021/ic030057x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the first example of oxidative addition of tellurium-halide bonds to a transition-metal complex, Ph(2)TeCl(2) reacts with [PtMe(2)(bu(2)bpy)], 1, bu(2)bpy = 4,4'-di-tert-butyl-2,2'-bipyridine, to give an organoplatinum(IV) complex that can be formulated as an ionic diphenyl telluride complex [PtClMe(2)(TePh(2))(bu(2)bpy)]Cl or as a neutral chlorodiphenyltelluryl complex [PtClMe(2)(TePh(2)Cl)(bu(2)bpy)]; the complex contains an unusually long Te...Cl bond length of 3.43 A. The weakly bound chloride ligand is easily removed by reaction with AgO(3)SCF(3) to give the cationic complex [PtClMe(2)(TePh(2))(bu(2)bpy)](CF(3)SO(3)) in which the triflate anion is not coordinated to tellurium. This complex reacts with a second 1 equiv of AgO(3)SCF(3) to give the aqua complex [PtMe(2)(OH(2))(TePh(2)..O(3)SCF(3))(bu(2)bpy)](CF(3)SO(3)), in which a triflate anion forms secondary bonds with both the aqua and TePh(2) ligands. In these platinum(IV) complexes, the magnitude of the coupling constant (1)J(PtTe) is strongly influenced by the presence of the weakly bonded Te...X groups.
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Affiliation(s)
- Michael C Janzen
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
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Lichtenberger DL. Electron Distribution, Bonding, and J(Si−H) NMR Coupling Constant in (η5-C5H5)(CO)2MnHSiCl3: The Molecular Orbital View. Organometallics 2003. [DOI: 10.1021/om030121i] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dennis L. Lichtenberger
- Center for Gas-Phase Electron Spectroscopy, Department of Chemistry, The University of Arizona, Tucson, Arizona 85721
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30
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Jokisaari J, Autschbach J. 13C–77Se and77Se–77Se spin–spin coupling tensors in carbon diselenide: NMR experiments and ZORA DFT calculations. Phys Chem Chem Phys 2003. [DOI: 10.1039/b305442j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Sychrovský V, Schneider B, Hobza P, Žídek L, Sklenář V. The effect of water on NMR spin–spin couplings in DNA: Improvement of calculated values by application of two solvent models. Phys Chem Chem Phys 2003. [DOI: 10.1039/b210553e] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Mednikov EG, Dahl LF. Formation of thallium(i) sandwich M3TlM3clusters, [(μ6-Tl)M6(μ2-CO)6(PEt3)6]+(M = Pt, Pd), with two unconnected triangular M3(μ2-CO)3(PEt3)3units: implications of comparative analysis of isostructural 5d106s2Tl(i)–(M3)2sandwiches (M = Pt, Pd) with known 5d10Au(i)–(Pt3)2sandwich. Dalton Trans 2003. [DOI: 10.1039/b304409m] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pyykkö P, Patzschke M. On the nature of the short Pt–Tl bonds in model compounds [H5Pt–TlHn]n−. Faraday Discuss 2003; 124:41-51; discussion 53-6, 453-5. [PMID: 14527208 DOI: 10.1039/b211364c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
RHF, DFT and MP2 calculations are reported for the compounds [H5Pt-TlHn]n-, n = 0-2. These serve as analogues for the experimentally known [(NC)5Pt-Tl(CN)n](n-)-species. The very short bond between platinum and thallium is discussed.
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Affiliation(s)
- Pekka Pyykkö
- Department of Chemistry, University of Helsinki, POB 55 (A. I. Virtasen aukio 1), FIN-00014 Helsinki, Finland.
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34
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Ma G, Fischer A, Glaser J. Synthesis and Structure of Monomeric and Platinum-Bonded (1,10-Phenanthroline)thallium Complexes. Eur J Inorg Chem 2002. [DOI: 10.1002/1099-0682(200206)2002:6<1307::aid-ejic1307>3.0.co;2-r] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Jalilehvand F, Maliarik M, Mink J, Sandström M, Ilyukhin A, Glaser J. Structure Studies of Dimeric [Pt2(CN)10]4- Pentacyanoplatinum(III) and Monomeric Pentacyanoplatinum(IV) Complexes by EXAFS, Vibrational Spectroscopy, and X-ray Crystallography. J Phys Chem A 2002. [DOI: 10.1021/jp012712x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Farideh Jalilehvand
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, Department of Chemistry, Inorganic Chemistry, The Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prospect 31, Moscow 117907, Russia, Department of Analytical Chemistry, University of Veszprém, P.O. Box 158, H-8201, Veszprém, Hungary, Institute of Isotope and Surface Chemistry of the Hungarian Academy of Sciences, P.O
| | - Mikhail Maliarik
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, Department of Chemistry, Inorganic Chemistry, The Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prospect 31, Moscow 117907, Russia, Department of Analytical Chemistry, University of Veszprém, P.O. Box 158, H-8201, Veszprém, Hungary, Institute of Isotope and Surface Chemistry of the Hungarian Academy of Sciences, P.O
| | - János Mink
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, Department of Chemistry, Inorganic Chemistry, The Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prospect 31, Moscow 117907, Russia, Department of Analytical Chemistry, University of Veszprém, P.O. Box 158, H-8201, Veszprém, Hungary, Institute of Isotope and Surface Chemistry of the Hungarian Academy of Sciences, P.O
| | - Magnus Sandström
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, Department of Chemistry, Inorganic Chemistry, The Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prospect 31, Moscow 117907, Russia, Department of Analytical Chemistry, University of Veszprém, P.O. Box 158, H-8201, Veszprém, Hungary, Institute of Isotope and Surface Chemistry of the Hungarian Academy of Sciences, P.O
| | - Andrey Ilyukhin
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, Department of Chemistry, Inorganic Chemistry, The Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prospect 31, Moscow 117907, Russia, Department of Analytical Chemistry, University of Veszprém, P.O. Box 158, H-8201, Veszprém, Hungary, Institute of Isotope and Surface Chemistry of the Hungarian Academy of Sciences, P.O
| | - Julius Glaser
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, Department of Chemistry, Inorganic Chemistry, The Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prospect 31, Moscow 117907, Russia, Department of Analytical Chemistry, University of Veszprém, P.O. Box 158, H-8201, Veszprém, Hungary, Institute of Isotope and Surface Chemistry of the Hungarian Academy of Sciences, P.O
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Jalilehvand F, Maliarik M, Sandström M, Mink J, Persson I, Persson P, Tóth I, Glaser J. New class of oligonuclear platinum-thallium compounds with a direct metal-metal bond. 5. Structure determination of heterodimetallic cyano complexes in aqueous solution by EXAFS and vibrational spectroscopy. Inorg Chem 2001; 40:3889-99. [PMID: 11466046 DOI: 10.1021/ic010055h] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structures of three closely related heterodimetallic cyano complexes, [(NC)(5)Pt-Tl(CN)(n)()](n)()(-) (n = 1-3), formed in reactions between [Pt(II)(CN)(4)](2)(-) and Tl(III) cyano complexes, have been studied in aqueous solution. Multinuclear NMR data ((205)Tl, (195)Pt, and (13)C) were used for identification and quantitative analysis. X-ray absorption spectra were recorded at the Pt and Tl L(III) edges. The EXAFS data show, after developing a model describing the extensive multiple scattering within the linearly coordinated cyano ligands, short Pt-Tl bond distances in the [(NC)(5)Pt-Tl(CN)(n)()](n)()(-) complexes: 2.60(1), 2.62(1), and 2.64(1) A for n = 1-3, respectively. Thus, the Pt-Tl bond distance increases with increasing number of cyano ligands on the thallium atom. In all three complexes the thallium atom and five cyano ligands, with a mean Pt-C distance of 2.00-2.01 A, octahedrally coordinate the platinum atom. In the hydrated [(NC)(5)Pt-Tl(CN)(H(2)O)(4)](-) species the thallium atom coordinates one cyano ligand, probably as a linear Pt-Tl-CN entity with a Tl-C bond distance of 2.13(1) A, and possibly four loosely bound water molecules with a mean Tl-O bond distance of about 2.51 A. In the [(NC)(5)Pt-Tl(CN)(2)](2)(-) species, the thallium atom probably coordinates the cyano ligands trigonally with two Tl-C bond distances at 2.20(2) A, and in [(NC)(5)Pt-Tl(CN)(3)](3)(-) Tl coordinates tetrahedrally with three Tl-C distances at 2.22(2) A. EXAFS data were reevaluated for previously studied mononuclear thallium(III)-cyano complexes in aqueous solution, [Tl(CN)(2)(H(2)O)(4)](+), [Tl(CN)(3)(H(2)O)], and [Tl(CN)(4)](-), and also for the solid K[Tl(CN)(4)] compound. A comparison shows that the Tl-C bond distances are longer in the dinuclear complexes [(NC)(5)Pt-Tl(CN)(n)()](n)()(-) (n = 1-3) for the same coordination number. Relative oxidation states of the metal atoms were estimated from their (195)Pt and (205)Tl chemical shifts, confirming that the [(NC)(5)Pt-Tl(CN)(n)()](n)()(-) complexes can be considered as metastable intermediates in a two-electron-transfer redox reaction from platinum(II) to thallium(III). Vibrational spectra were recorded and force constants from normal-coordinate analyses are used for discussing the delocalized bonding in these species.
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Affiliation(s)
- F Jalilehvand
- Department of Chemistry, Inorganic Chemistry, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden
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