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Denjean AEF, Rio J, Ciofini I, Perrin MEL, Payard PA. Computed versus experimental energy barriers in solution: Influence of the type of the density functional approximation. J Comput Chem 2024; 45:2284-2293. [PMID: 38847601 DOI: 10.1002/jcc.27436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/18/2024] [Accepted: 04/24/2024] [Indexed: 08/15/2024]
Abstract
Mechanistic investigations at the density functional theory level of organic and organometallic reactions in solution are now broadly accessible and routinely implemented to complement experimental investigations. The selection of an appropriate functional among the plethora of developed ones is the first challenge on the way to reliable energy barrier calculations. To provide guidelines for the choice of an initial and reliable computational level, the performances of commonly used non-empirical (PBE, PBE0, PBE0-DH) and empirical density functionals (BLYP, B3LYP, B2PLYP) were evaluated relative to experimental activation enthalpies. Most reactivity databases to assess density functional performances are primarily based on high level calculations, here a set of experimental activation enthalpies of organic and organometallic reactions performed in solution were selected from the literature. As a general trend, the non-empirical functionals outperform the empirical ones. The most accurate energy barriers are obtained with hybrid PBE0 and double-hybrid PBE0-DH density functionals, both providing similar performance. Regardless of the functional under consideration, the addition of the GD3-BJ empirical dispersion correction does not enhance the accuracy of computed energy barriers.
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Affiliation(s)
- Aurore E F Denjean
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, Oslo, Norway
- Universite Claude Bernard Lyon I, CNRS, CPE-Lyon, INSA-Lyon, UMR 5246, ICBMS Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
| | - Jordan Rio
- Universite Claude Bernard Lyon I, CNRS, CPE-Lyon, INSA-Lyon, UMR 5246, ICBMS Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
| | - Ilaria Ciofini
- i-CLeHS (UMR 8060), CNRS Chimie Paris-Tech-PSL, Université Paris Sciences et Lettres, Paris, France
| | - Marie-Eve L Perrin
- Universite Claude Bernard Lyon I, CNRS, CPE-Lyon, INSA-Lyon, UMR 5246, ICBMS Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
| | - Pierre-Adrien Payard
- Universite Claude Bernard Lyon I, CNRS, CPE-Lyon, INSA-Lyon, UMR 5246, ICBMS Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
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2
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Arnal L, Escudero D, Fuertes S, Martin A, Sicilia V. High-Valent Pyrazolate-Bridged Platinum Complexes: A Joint Experimental and Theoretical Study. Inorg Chem 2022; 61:12559-12569. [PMID: 35925811 PMCID: PMC9387385 DOI: 10.1021/acs.inorgchem.2c01441] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Complexes [{Pt(C^C*)(μ-pz)}2] (HC^C*A = 1-(4-(ethoxycarbonyl)phenyl)-3-methyl-1H-imidazol-2-ylidene 1a, HC^C*B = 1-phenyl-3-methyl-1H-imidazol-2-ylidene 1b) react with methyl
iodide (MeI)
at room temperature in the dark to give compounds [{PtIV(C^C*)Me(μ-pz)}2(μ-I)]I (C^C*A2a, C^C*B2b). The reaction of 1a with benzyl bromide (BnBr) in the same conditions afforded
[Br(C^C*A)PtIII(μ-pz)2PtIII(C^C*A)Bn] (5a), which by heating
in BnBr(l) became [{PtIV(C^C*A)Bn(μ-pz)}2(μ-Br)]Br (6a). Experimental investigations
and density functional theory (DFT) calculations on the mechanisms
of these reactions from 1a revealed that they follow
a SN2 pathway in the two steps of the double oxidative
addition (OA). Based on the DFT investigations, species such as [(C^C*A)PtIII(μ-pz)2PtIII(C^C*A)R]X (RX = MeI Int-Me, BnBr Int-Bn) and [(C^C*A)PtII(μ-pz)2PtIV(C^C*A)(R)X] (RX = MeI Int′-Me, BnBr Int′-Bn) were proposed as intermediates
for the first and the second OA reactions, respectively. In order
to put the mechanisms on firmer grounds, Int-Me was prepared
as [(C^C*A)PtIII(μ-pz)2PtIII(C^C*A)Me]BF4 (3a′) and used to get [I(C^C*A)PtIII(μ-pz)2PtIII(C^C*A)Me](4a), [(C^C*A)PtII(μ-pz)2PtIV(C^C*A)(Me)I](Int′-Me), and [{PtIV(C^C*)Me(μ-pz)}2(μ-I)]BF4 (2a′). The single-crystal X-ray structures of 2a, 2b, 3a′, and 5a along with the mono- and bi-dimensional 1H and 195Pt{1H} NMR spectra of all the named species allowed us
to compare structural and spectroscopic data for high-valent complexes
with the same core [{Pt(C^C*)(μ-pz)}2] but different
oxidation states. Experimental
and theoretical
investigations on the mechanisms
of OA reactions of MeI and BnBr to [{PtII(C^C*)(μ-pz)}2] allowed us to get high-valent pyrazolate-bridged platinum
compounds: Pt2(III,III), Pt2(II,IV), and Pt2(IV,IV). Their stability and structural and spectroscopic
features have been compared.
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Affiliation(s)
- Lorenzo Arnal
- Departamento de Química Inorgánica, Facultad de Ciencias, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Daniel Escudero
- Department of Chemistry, KU Leuven, Celestijnenlaan 200f - box 2404, 3001 Leuven, Belgium
| | - Sara Fuertes
- Departamento de Química Inorgánica, Facultad de Ciencias, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Antonio Martin
- Departamento de Química Inorgánica, Facultad de Ciencias, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Violeta Sicilia
- Departamento de Química Inorgánica, Escuela de Ingeniería y Arquitectura de Zaragoza, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Campus Rio Ebro, Edificio Torres Quevedo, 50018 Zaragoza, Spain
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3
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Nabavizadeh SM, Molaee H, Haddadi E, Niroomand Hosseini F, Hoseini SJ, Abu-Omar MM. Tetranuclear rollover cyclometalated organoplatinum-rhenium compounds; C-I oxidative addition and C-C reductive elimination using a rollover cycloplatinated dimer. Dalton Trans 2021; 50:15015-15026. [PMID: 34609403 DOI: 10.1039/d1dt02086b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel tetranuclear Pt(IV)-Re(VII) complex [Pt2Me4(OReO3)2(PMePh2)2(µ-bpy-2H)], 4, is synthesized through the reaction of silver perrhenate with a new rollover cycloplatinated(IV) complex [Pt2Me4I2(PMePh2)2(µ-bpy-2H)], 3. In complex 4, while 2,2'-bipyridine (bpy) acts as a linker between two Pt metal centers, oxygen acts as a mono-bridging atom between Pt and Re centers through an unsupported Pt(IV)-O-Re(VII) bridge. The precursor rollover cycloplatinated(IV) complex 3 is prepared by the MeI oxidative addition reaction of the rollover cycloplatinated(II) complex [Pt2Me2(PMePh2)2(µ-bpy-2H)], 2. Complex 2 shows a metal-to-ligand charge-transfer band in the visible region, which was used to investigate the kinetics and mechanism of its double MeI oxidative addition reaction. Based on the experimental findings, the classical SN2 mechanism was suggested for both steps and supported by computational studies. All complexes are fully characterized using multinuclear NMR spectroscopy and elemental analysis. Attempts to grow crystals of the rollover cycloplatinated(IV) dimer 3 yielded a new dimer rollover cyclometalated complex [Pt2I2(PMePh2)2(µ-bpy-2H)], 5, presumably from the C-C reductive elimination of ethane. The identity of complex 5 was confirmed by single crystal X-ray diffraction analysis.
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Affiliation(s)
- S Masoud Nabavizadeh
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.
| | - Hajar Molaee
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.
| | - Elahe Haddadi
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.
| | | | - S Jafar Hoseini
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.
| | - Mahdi M Abu-Omar
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
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4
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Kuijpers T, Blom B. Homo and heterobimetallic palladium and platinum complexes bearing μ-diphosphane bridges involved in biological studies. Eur J Med Chem 2021; 223:113651. [PMID: 34214843 DOI: 10.1016/j.ejmech.2021.113651] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/10/2021] [Accepted: 06/13/2021] [Indexed: 02/03/2023]
Abstract
Given the increasing reports of well-defined bimetallic molecular complexes as potential anticancer agents in the last decades, along with the prevalence of platinum in anticancer therapy, we report here a detailed survey of bimetallic platinum and palladium complexes investigated as potential anticancer agents. Specifically, we will concentrate on the synthesis, characterisation and biological (anticancer) studies of a sub-class of these agents, namely homo and heterobimetallic complexes bearing a bridging phosphane ligand of the type: [LnM1(μ-R2P(CH2)nPR2)M2Lm] (where M1 is platinum or palladium, M2 is any other transition metal, R = alkyl or aryl substituents, Ln or Lm are co-ligands, n = 1-6). We will review the in vitro and in vivo activities and any mechanistic anticancer studies of these complexes with a view of trying to delineate patterns in biological activity and structure-activity relationships (SAR). We do not include the review of bimetallic complexes in this class that have not undergone any anticancer testing, nor those that have been involved in other biological investigations unrelated to cancer studies.
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Affiliation(s)
- Talita Kuijpers
- Maastricht Science Programme, Faculty of Science and Engineering, Maastricht University, Paul-Henri Spaaklaan, 1, PO Box 616, 6200 MD, Maastricht, the Netherlands
| | - Burgert Blom
- Maastricht Science Programme, Faculty of Science and Engineering, Maastricht University, Paul-Henri Spaaklaan, 1, PO Box 616, 6200 MD, Maastricht, the Netherlands.
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5
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The history of organoplatinum chemistry in Iran: 40-year research. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-01892-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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6
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Haddadi E, Nabavizadeh SM, Hosseini FN. Computational study of the C I bimetallic oxidative addition at Pt M (M = Ni, Pd and Pt) reaction centers. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.02.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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7
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Shahsavari HR, Aghakhanpour RB, Hossein-Abadi M, Kia R, Raithby PR. Stable transisomer as the kinetic and theromodynamic product for the oxidative addition of MeI to cycloplatinated(II) complexes comprising isocyanide ligands. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); Yousef Sobouti Blvd Zanjan 45137-66731 Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); Yousef Sobouti Blvd Zanjan 45137-66731 Iran
| | - Mojdeh Hossein-Abadi
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); Yousef Sobouti Blvd Zanjan 45137-66731 Iran
| | - Reza Kia
- Chemistry Department; Sharif University of Technology; P.O. Box 11155-3516 Tehran Iran
| | - Paul R. Raithby
- Department of Chemistry; University of Bath; Claverton Down BA2 7AY Bath UK
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8
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Shahsavari HR, Babadi Aghakhanpour R, Babaghasabha M, Golbon Haghighi M, Nabavizadeh SM, Notash B. Combined Kinetico‐Mechanistic and Theoretical Elucidation of the Oxidative Addition of Iodomethane to Cycloplatinated(II) Complexes: Controlling the Rate of
trans/cis
Isomerization. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry Institute for Advanced Studies in Basic Sciences (IASBS) Yousef Sobouti Blvd. 45137‐6731 Zanjan Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry Institute for Advanced Studies in Basic Sciences (IASBS) Yousef Sobouti Blvd. 45137‐6731 Zanjan Iran
- Department of Chemistry College of Sciences Shiraz University 71454 Shiraz Iran
| | - Mojgan Babaghasabha
- Department of Chemistry Institute for Advanced Studies in Basic Sciences (IASBS) Yousef Sobouti Blvd. 45137‐6731 Zanjan Iran
| | | | | | - Behrouz Notash
- Department of Chemistry Shahid Beheshti University Evin 19839‐69411 Tehran Iran
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9
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Shahsavani MB, Ahmadi S, Aseman MD, Nabavizadeh SM, Alavianmehr MM, Yousefi R. Comparative study on the interaction of two binuclear Pt (II) complexes with human serum albumin: Spectroscopic and docking simulation assessments. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 164:323-334. [DOI: 10.1016/j.jphotobiol.2016.09.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 09/26/2016] [Accepted: 09/27/2016] [Indexed: 12/26/2022]
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10
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Shahsavani MB, Ahmadi S, Aseman MD, Nabavizadeh SM, Rashidi M, Asadi Z, Erfani N, Ghasemi A, Saboury AA, Niazi A, Bahaoddini A, Yousefi R. Anticancer activity assessment of two novel binuclear platinum (II) complexes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 161:345-54. [DOI: 10.1016/j.jphotobiol.2016.05.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 05/14/2016] [Accepted: 05/30/2016] [Indexed: 11/29/2022]
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11
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Niroomand Hosseini F. Theoretical studies of methyl iodide oxidative addition to adjacent metal centers in diplatinum(II) complexes. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Sicilia V, Baya M, Borja P, Martín A. Oxidation of Half-Lantern Pt2(II,II) Compounds by Halocarbons. Evidence of Dioxygen Insertion into a Pt(III)-CH3 Bond. Inorg Chem 2015. [PMID: 26197039 DOI: 10.1021/acs.inorgchem.5b00846] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The half-lantern compound [{Pt(bzq)(μ-N^S)}2] (1) [bzq = benzo[h]quinoline, HN^S = 2-mercaptopyrimidine (C4H3N2HS)] reacts with CH3I and haloforms CHX3 (X = Cl, Br, I) to give the corresponding oxidized diplatinum(III) derivatives [{Pt(bzq)(μ-N^S)X}2] (X = Cl 2a, Br 2b, I 2c). These compounds exhibit half-lantern structures with short intermetallic distances (∼2.6 Å) due to Pt-Pt bond formation. The halogen abstraction mechanisms from the halocarbon molecules by the Pt2(II,II) compound 1 were investigated. NMR spectroscopic evidence using labeled reagents support that in the case of (13)CH3I the reaction initiates with an oxidative addition through an SN2 mechanism giving rise to the intermediate species [I(bzq)Pt(μ-N^S)2Pt(bzq)((13)CH3)}]. However, with haloforms the reactions proceed through a radical-like mechanism, thermally (CHBr3, CHI3) or photochemically (CHCl3) activated, giving rise to mixtures of species [X(bzq)Pt(μ-N^S)2Pt(bzq)R] (3a-c) and [X(bzq)Pt(μ-N^S)2Pt(bzq)X] (2a-c). In these cases the presence of O2 favors the formation of species 2 over 3. Transformation of 3 into 2 was possible upon irradiation with UV light. In the case of [I(bzq)Pt(μ-N^S)2Pt(bzq)((13)CH3)}] (3d), in the presence of O2 the formation of the unusual methylperoxo derivative [I(bzq)Pt(μ-N^S)2Pt(bzq)(O-O(13)CH3)}] (4d) was detected, which in the presence of (13)CH3I rendered the final product [{Pt(bzq)(μ-N^S)I}2] (2c) and (13)CH3OH.
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Affiliation(s)
- V Sicilia
- †Departamento de Química Inorgánica, Escuela de Ingeniería y Arquitectura de Zaragoza, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Campus Río Ebro, Edificio Torres Quevedo, 50018 Zaragoza, Spain
| | - M Baya
- ‡Departamento de Química Inorgánica, Facultad de Ciencias, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - P Borja
- ‡Departamento de Química Inorgánica, Facultad de Ciencias, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - A Martín
- ‡Departamento de Química Inorgánica, Facultad de Ciencias, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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13
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Aghakhanpour RB, Rashidi M, Hosseini FN, Raoof F, Nabavizadeh SM. Oxidation of a rollover cycloplatinated(ii) dimer by MeI: a kinetic study. RSC Adv 2015. [DOI: 10.1039/c5ra12201e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The known rollover cycloplatinated(ii) complex [Pt2Me2(PPh3)2(μ-bpy-2H)], 1, in which bpy-2H acts as a bridging rollover ligand, reacts with MeI to give a new binuclear rollover cycloplatinated(iv) complex [Pt2Me4I2(PPh3)2(μ-bpy-2H)], 2.
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Affiliation(s)
| | - Mehdi Rashidi
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
| | | | - Fatemeh Raoof
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
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14
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Kinetico-mechanistic studies on CX (X=H, F, Cl, Br, I) bond activation reactions on organoplatinum(II) complexes. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.06.010] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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15
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Kornecki KP, Berry JF, Powers DC, Ritter T. MetalMetal Bond-Containing Complexes as Catalysts for CH Functionalization. PROGRESS IN INORGANIC CHEMISTRY 2014. [DOI: 10.1002/9781118792797.ch04] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Hoseini SJ, Nasrabadi H, Hashemi Fath R, Moradi Z, Rashidi M. Oxidative Addition of Propargyl Halides, Chloroacetonitrile, and Ethyl Chloroacetate to a Dimethylplatinum(II) Complex: Kinetic and DFT Studies. Organometallics 2014. [DOI: 10.1021/om500022r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- S. Jafar Hoseini
- Department of Chemistry, Faculty of Sciences, Yasouj University, Yasouj 7591874831, Iran
| | - Hasan Nasrabadi
- Department of Chemistry, Faculty of Sciences, Yasouj University, Yasouj 7591874831, Iran
| | - Roghayeh Hashemi Fath
- Department of Chemistry, Faculty of Sciences, Yasouj University, Yasouj 7591874831, Iran
| | - Zohreh Moradi
- Department of Chemistry, Faculty of Sciences, Yasouj University, Yasouj 7591874831, Iran
| | - Mehdi Rashidi
- Department of Chemistry, Faculty of Sciences, Shiraz University, Shiraz 71454, Iran
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17
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Bis(diphenylphosphino)acetylene as bifunctional ligand in cycloplatinated complexes: Synthesis, characterization, crystal structures and mechanism of MeI oxidative addition. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.07.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Nabavizadeh SM, Aseman MD, Ghaffari B, Rashidi M, Hosseini FN, Azimi G. Kinetics and mechanism of oxidative addition of MeI to binuclear cycloplatinated complexes containing biphosphine bridges: Effects of ligands. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.05.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Substitution reactions involving cyclometalated platinum(II) complexes: Kinetic investigations. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.08.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Density functional studies of influences of Ni triad metals and solvents on oxidative addition of MeI to [M(CH3)2(NH3)2] complexes and C–C reductive elimination from [M(CH3)3(NH3)2I] complexes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.07.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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21
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Powers DC, Benitez D, Tkatchouk E, Goddard WA, Ritter T. Bimetallic reductive elimination from dinuclear Pd(III) complexes. J Am Chem Soc 2011; 132:14092-103. [PMID: 20858006 DOI: 10.1021/ja1036644] [Citation(s) in RCA: 210] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In 2009, we reported C-halogen reductive elimination reactions from dinuclear Pd(III) complexes and implicated dinuclear intermediates in Pd(OAc)(2)-catalyzed C-H oxidation chemistry. Herein, we report results of a thorough experimental and theoretical investigation of the mechanism of reductive elimination from such dinuclear Pd(III) complexes, which establish the role of each metal during reductive elimination. Our results implicate reductive elimination from a complex in which the dinuclear core is intact and suggest that redox synergy between the two metals is responsible for the facile reductive elimination reactions observed.
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Affiliation(s)
- David C Powers
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA
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22
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Hoseini SJ, Rashidi M, Bahrami M. Platinum nanostructures at the liquid–liquid interface: catalytic reduction of p-nitrophenol to p-aminophenol. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11814e] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Nabavizadeh SM, Habibzadeh S, Rashidi M, Puddephatt RJ. Oxidative Addition of Ethyl Iodide to a Dimethylplatinum(II) Complex: Unusually Large Kinetic Isotope Effects and Their Transition-State Implications. Organometallics 2010. [DOI: 10.1021/om100810t] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Sepideh Habibzadeh
- Department of Chemistry, Faculty of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Mehdi Rashidi
- Department of Chemistry, Faculty of Sciences, Shiraz University, Shiraz 71454, Iran
- Department of Chemistry, University of Western Ontario, London, Canada N6A 5B7
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Rashidi M, Nabavizadeh SM, Zare A, Jamali S, Puddephatt RJ. Associative and Dissociative Mechanisms in the Formation of Phthalazine Bridged Organodiplatinum(II) Complexes. Inorg Chem 2010; 49:8435-43. [DOI: 10.1021/ic1010067] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mehdi Rashidi
- Department of Chemistry, Faculty of Sciences, Shiraz University, Shiraz 71454 Iran
| | | | - Ahad Zare
- Department of Chemistry, Faculty of Sciences, Shiraz University, Shiraz 71454 Iran
| | - Sirous Jamali
- Department of Chemistry, Persian Gulf University, Bushehr 75169, Iran
| | - Richard J. Puddephatt
- Department of Chemistry, the University of Western Ontario, London, Ontario, Canada N6A 5B7
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Nabavizadeh SM, Shahsavari HR, Sepehrpour H, Hosseini FN, Jamali S, Rashidi M. Oxidative addition reaction of diarylplatinum(II) complexes with MeI in ionic liquid media: a kinetic study. Dalton Trans 2010; 39:7800-5. [PMID: 20664857 DOI: 10.1039/c0dt00282h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A kinetic study of the oxidative addition reaction of diarylplatinum(II) complexes [Pt(p-MeC(6)H(4))(2)(NN)] (1a: NN = 1,10-phenanthroline (phen) and 1b: NN = 4,4'-di-tert-butyl-2,2'-bipyridine ((t)Bu(2)bpy)) with MeI in ionic liquids 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([bmim][bta]) or 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF(4)]) is described. The reactions were investigated as a function of MeI concentration and temperature under pseudo-first-order conditions using UV-vis spectroscopy techniques. In general, the oxidative addition reactions in ionic liquids followed an S(N)2 mechanism, similar to that reported for the related reactions in conventional solvents, e.g. benzene or acetone. The reaction rates in different solvents followed the order acetone > ionic liquids > benzene. The trend in the values of k(2) clearly indicated that ionic liquids behave like conventional solvents and that no particular 'ionic liquid effect' was detected in this kind of reaction. The effect of solvent on the reactions was examined using a linear solvation energy relationship (LSER) based on the Kamlet-Taft solvent scale. The activation parameters, DeltaH(++) and DeltaS(++), were obtained for the reactions in each solvent and the investigation of enthalpy-entropy compensation confirmed that the mechanism operated in all solvents is similar.
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Affiliation(s)
- S Masoud Nabavizadeh
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran.
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26
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Jamali S, Mazloomi Z, Nabavizadeh SM, Milić D, Kia R, Rashidi M. Cyclometalated Cluster Complex with a Butterfly-Shaped Pt2Ag2 Core. Inorg Chem 2010; 49:2721-6. [DOI: 10.1021/ic902044g] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sirous Jamali
- Department of Chemistry, Persian Gulf University, Bushehr 75169, Iran
| | - Zahra Mazloomi
- Department of Chemistry, Persian Gulf University, Bushehr 75169, Iran
| | | | - Dalibor Milić
- Laboratory of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Reza Kia
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Mehdi Rashidi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
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27
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Nabavizadeh SM, Tabei ES, Hosseini FN, Keshavarz N, Jamali S, Rashidi M. Diorganoplatinum(ii) complexes with chelating PN ligand 2-(diphenylphosphinoamino)pyridine; synthesis and kinetics of the reaction with MeI. NEW J CHEM 2010. [DOI: 10.1039/b9nj00523d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Habibzadeh S, Rashidi M, Nabavizadeh SM, Mahmoodi L, Hosseini FN, Puddephatt RJ. Steric and Solvent Effects on the Secondary Kinetic α-Deuterium Isotope Effects in the Reaction of Methyl Iodide with Organoplatinum(II) Complexes: Application of a Second-Order Technique in Measuring the Rates of Rapid Processes. Organometallics 2009. [DOI: 10.1021/om900778u] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Sepideh Habibzadeh
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Mehdi Rashidi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | | | - Leila Mahmoodi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | | | - Richard J. Puddephatt
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7
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Au RH, Findlay-Shirras LJ, Woody NM, Jennings MC, Puddephatt RJ. Organoplatinum(IV) complexes with functional alkyl groups and their use in supramolecular chemistry. CAN J CHEM 2009. [DOI: 10.1139/v09-031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The oxidative addition of alkyl bromides RCH2Br (R = C5H4N, C6H4CN, CH2C6H4CO2H, or CH2C6H4CH2CO2H) to dimethylplatinum(II) complexes [PtMe2(LL)] (LL = diimine ligand) gives the corresponding organoplatinum(IV) complexes [PtBrMe2(CH2R)(LL)] containing functionality in the alkyl group RCH2. The pyridyl derivatives can be protonated, while abstraction of the bromide ligand from [PtBrMe2(CH2R)(LL)] can form cationic complexes, which can react with water or form oligomers by self-assembly.
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Affiliation(s)
- Richard H.W. Au
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | | | - Neil M. Woody
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Michael C. Jennings
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
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Hoseini SJ, Nabavizadeh SM, Jamali S, Rashidi M. Uncommon Solvent Effect in Oxidative Addition of MeI to a New Dinuclear Platinum Complex Containing a Platina(II)cyclopentane Moiety. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800637] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bonnington KJ, Jennings MC, Puddephatt RJ. Oxidative Addition of S−S Bonds to Dimethylplatinum(II) Complexes: Evidence for a Binuclear Mechanism. Organometallics 2008. [DOI: 10.1021/om800776b] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Kevin J. Bonnington
- Department of Chemistry, University of Western Ontario, London, Canada N6A 5B
| | - Michael C. Jennings
- Department of Chemistry, University of Western Ontario, London, Canada N6A 5B
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Jamali S, Nabavizadeh SM, Rashidi M. Binuclear cyclometalated organoplatinum complexes containing 1,1'-bis(diphenylphosphino)ferrocene as spacer ligand: kinetics and mechanism of MeI oxidative addition. Inorg Chem 2008; 47:5441-52. [PMID: 18484719 DOI: 10.1021/ic701910d] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The binuclear complex [Pt2Me2(ppy)2(mu-dppf)], 1, in which ppy = deprotonated 2-phenylpyridyl and dppf = 1,1'-bis(diphenylphosphino)ferrocene, was synthesized by the reaction of [PtMe(SMe2)(ppy)] with 0.5 equiv of dppf at room temperature. In this reaction when 1 equiv of dppf was used, the dppf chelating complex 2, [PtMe(dppf)(ppy-kappa1C)], was obtained. The reaction of Pt(II)-Pt(II) complex 1 with excess MeI gave the Pt(IV)-Pt(IV) complex [Pt2I2Me4(ppy)2(mu-dppf)], 3. When the reaction was performed with 1 equiv of MeI, a mixture containing unreacted complex 1, a mixed-valence Pt(II)-Pt(IV) complex [PtMe(ppy)(mu-dppf)PtIMe2(ppy)], 4, and complex 3 was obtained. In a comparative study, the reaction of [PtMe(SMe2)(ppy)] with 1 equiv of monodentate phosphine PPh3 gave [PtMe(ppy)(PPh3)], A. MeI was reacted with A to give the platinum(IV) complex [PtMe2I(ppy)(PPh3)], C. All the complexes were fully characterized using multinuclear (1H, 31P, 13C, and 195Pt) NMR spectroscopy, and complex 2 was further identified by single crystal X-ray structure determination. The reaction of binuclear Pt(II)-Pt(II) complex 1 with excess MeI was monitored by low temperature 31P NMR spectroscopy and further by 1H NMR spectroscopy, and the kinetics of the reaction was studied by UV-vis spectroscopy. On the basis of the data, a mechanism has been suggested for the reaction which overall involved stepwise oxidative addition of MeI to the two Pt(II) centers. In this suggested mechanism, the reaction proceeded through a number of Pt(II)-Pt(IV) and Pt(IV)-Pt(IV) intermediates. Although MeI in each step was trans oxidatively added to one of the Pt(II) centers, further trans to cis isomerizations of Me and I groups were also identified. A comparative kinetic study of the reaction of monomeric platinum(II) complex A with MeI was also performed. The rate of reaction of MeI with complex 1 was some 3.5 times faster than that with complex A, indicating that dppf in the complex 1, as compared with PPh 3 in the complex A, has significantly enhanced the electron richness of the platinum centers.
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Affiliation(s)
- Sirous Jamali
- Chemistry Department, Persian Gulf University, Bushehr 75169, Iran.
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Nabavizadeh SM, Hoseini SJ, Momeni BZ, Shahabadi N, Rashidi M, Pakiari AH, Eskandari K. Oxidative addition of n-alkyl halides to diimine-dialkylplatinum(II) complexes: a closer look at the kinetic behaviors. Dalton Trans 2008:2414-21. [PMID: 18461196 DOI: 10.1039/b800771c] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The n-alkyl halides, RX, were oxidatively added to the platina(II)cyclopentane complexes [Pt[(CH2)4](NN)], in which NN = bpy (2,2'-bipyridyl) or phen (1,10-phenanthroline), to give the platinum(IV) complexes [PtRX[(CH2)4](NN)], R = Et and X = Br or I; R = nBu and X = I, 1-3. The same reactions with the analogous dimethyl complex [PtMe2(bpy)] gave the expected platinum(IV) complexes [PtRXMe2(bpy)], R = Et or nPr and X = Br or I; R = nBu and X = I, 4-8. Kinetics of the reactions in benzene and acetone was studied using UV-vis spectrophotometery and a common S(N)2 mechanism was suggested for each case. The platina(ii)cyclopentane complexes reacted faster than the corresponding dimethyl analogs by a factor of 2-3. This is described as being due to a lower positive charge, calculated by density functional theory (DFT), on the platinum atom of [Pt[(CH)2)4](bpy)] compared with that on the platinum atom of the dimethyl analog [PtMe2(bpy)]. The values of DeltaDeltaS(double dagger) = DeltaS(double dagger)(acetone) - DeltaS(double dagger)(benzene) were found to be either positive or negative in different reactions and this is related to the solvation of the corresponding alkyl halide. It is suggested that in these reactions of RX reagents, for a given X, the electronic effects of the R group are mainly responsible for the change in the rates of the reactions and the bulkiness of the group is far less important.
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Affiliation(s)
- S Masoud Nabavizadeh
- Inorganic Chemistry Division, Chemistry Department, College of Sciences, Shiraz University, Shiraz, 71454, Iran
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Jafar Hoseini S, Masoud Nabavizadeh S, Jamali S, Rashidi M. Ligand substitution reaction at a binuclear organoplatinum(II) complex. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.01.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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