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Structure-property relationships of photofunctional diiridium(II) complexes with tetracationic charge and an unsupported Ir-Ir bond. Commun Chem 2022; 5:159. [PMID: 36698025 PMCID: PMC9814866 DOI: 10.1038/s42004-022-00775-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 11/09/2022] [Indexed: 11/25/2022] Open
Abstract
In contrast to the extensively studied dirhodium(II) complexes and iridium(III) complexes, neutral or dicationic dinuclear iridium(II) complexes with an unsupported ligand are underdeveloped. Here, a series of tetracationic dinuclear iridium(II) complexes, featuring the unsupported Ir(II)-Ir(II) single bond with long bond distances (2.8942(4)-2.9731(4) Å), are synthesized and structurally characterized. Interestingly, compared to the previous unsupported neutral or dicationic diiridium(II) complexes, our DFT and high-level DLPNO-CCSD(T) results found the largest binding energy in these tetracationic complexes even with the long Ir(II)-Ir(II) bond. Our study further reveals that London dispersion interactions enhance the stability cooperatively and significantly to overcome the strong electrostatic repulsion between two half dicationic metal fragments. This class of complexes also exhibit photoluminescence in solution and solid states, which, to our knowledge, represents the first example of this unsupported dinuclear iridium(II) system. In addition, their photoreactivity involving the generation of iridium(II) radical monomer from homolytic cleavage was also explored. The experimental results of photophysical and photochemical behaviours were also correlated with computational studies.
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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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Arnal L, Fuertes S, Martín A, Baya M, Sicilia V. A Cyclometalated N‐Heterocyclic Carbene: The Wings of the First Pt
2
(II,II) Butterfly Oxidized by CHI
3. Chemistry 2018; 24:18743-18748. [DOI: 10.1002/chem.201804013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Lorenzo Arnal
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)Departamento de Química InorgánicaUniversidad de Zaragoza-CSIC C/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Sara Fuertes
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)Departamento de Química InorgánicaUniversidad de Zaragoza-CSIC C/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Antonio Martín
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)Departamento de Química InorgánicaUniversidad de Zaragoza-CSIC C/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Miguel Baya
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)Departamento de Química InorgánicaUniversidad de Zaragoza-CSIC C/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Violeta Sicilia
- Departamento de Química InorgánicaEscuela de Ingeniería y Arquitectura de ZaragozaUniversidad de ZaragozaInstituto de Síntesis Química y Catálisis Homogénea (ISQCH) Campus Río Ebro, Edificio Torres Quevedo 50018 Zaragoza Spain
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4
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Werner D, Anwander R. Unveiling the Takai Olefination Reagent via Tris( tert-butoxy)siloxy Variants. J Am Chem Soc 2018; 140:14334-14341. [PMID: 30213182 DOI: 10.1021/jacs.8b08739] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The elusive Takai olefination reagent, namely, the iodo-methylidene Cr(III) complex [Cr2Cl4(CHI)(thf)4], has been isolated by careful handling of the reaction between CrCl2 and CHI3 in THF at -35 °C. Alternatively, treatment of [Cr(OSi(O tBu)3)2] with CHI3 gave the mixed-valent dihalido-methanide complex [CrII/III2I2(OSi(O tBu)3)2(CHI2)], featuring a Cr(III)-CHI2 moiety. In the presence of TMEDA nucleophilic attack at CHI2 occurred generating the zwitterionic species [CrIII(OSi(O tBu)3)2(tmeda-CHI)][I]. Complexes [Cr2Cl4(CHI)(thf)4] and [CrII/III2I2(OSi(O tBu)3)2(CHI2)] were screened for their ability to induce monohalido olefination of benzaldehyde. Remarkably, both complexes promote olefination, with [Cr2Cl4(CHI)(thf)4] accomplishing the same E selectivity as Takai 's original mixture. Complex [CrII/III2I2(OSi(O tBu)3)2(CHI2)], however, appeared to give preferentially Z isomer, corroborating the monoiodo-methylidene species Cr(III)-CHI-Cr(III) as the active olefination component of the original in situ generated Takai reagent mixture.
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Affiliation(s)
- Daniel Werner
- Institut für Anorganische Chemie , Eberhard Karls Universität Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie , Eberhard Karls Universität Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany
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5
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Reactivity of [TiM2] (M = Rh, Ir) and [TiIr3] early-late heterobimetallic sulfido-bridged clusters. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2015.09.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Casado MA, Álvarez-Vergara MC, Pérez-Torrente JJ, Lahoz FJ, Dobrinovich IT, Oro LA. Synthesis of Titanium and Zirconium Complexes with 2-Pyridonate and 2, 6-Pyridinedithiolate Ligands. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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8
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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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9
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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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10
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Mak KHG, Chan PK, Fan WY, Ganguly R, Leong WK. Photochemical Reaction of Cp*Ir(CO)2 with C6F5X (X = CN, F): Formation of Diiridium(II) Complexes. Organometallics 2013. [DOI: 10.1021/om301055h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Kar Hang Garvin Mak
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Pek Ke Chan
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Wai Yip Fan
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Rakesh Ganguly
- Division of Chemistry
and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Weng Kee Leong
- Division of Chemistry
and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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11
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Castarlenas R, Cunchillos C, Gómez-Bautista D, Jiménez MV, Lahoz FJ, Miranda JR, Oro LA, Pérez-Torrente JJ. Bis(hydrosulfido)-bridged dinuclear rhodium( i) complexes as a platform for the synthesis of trinuclear sulfido aggregates with the core [MRh 2(μ 3-S 2)] (M = Rh, Ir, Pd, Pt, Ru). Dalton Trans 2013; 42:3471-81. [DOI: 10.1039/c2dt32680a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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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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13
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14
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Nguyen DH, Modrego FJ, Cetina-Casas JM, Gómez-Bautista D, Jiménez MV, Castarlenas R, Lahoz FJ, Oro LA, Pérez-Torrente JJ. Steric Effects in the Oxidative Addition of MeI to a Sulfido-Bridged ZrRh2 Early–Late Heterobimetallic Compound. Organometallics 2012. [DOI: 10.1021/om300629k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Duc Hanh Nguyen
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - F. Javier Modrego
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - J. Miguel Cetina-Casas
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - Daniel Gómez-Bautista
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - M. Victoria Jiménez
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - Ricardo Castarlenas
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - Fernando J. Lahoz
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - Luis A. Oro
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
| | - Jesús J. Pérez-Torrente
- Departamento de
Quı́mica Inorgánica, Instituto de
Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009-Zaragoza,
Spain
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15
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Jiménez MV, Lahoz FJ, Lukešová L, Miranda JR, Modrego FJ, Nguyen DH, Oro LA, Pérez-Torrente JJ. Hydride Mobility in Trinuclear Sulfido Clusters with the Core [Rh3(μ-H)(μ3-S)2]: Molecular Models for Hydrogen Migration on Metal Sulfide Hydrotreating Catalysts. Chemistry 2011; 17:8115-28. [DOI: 10.1002/chem.201100138] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Indexed: 11/10/2022]
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16
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Pinkas J, Císařová I, Horáček M, Kubišta J, Mach K. Reactions of Hydrogen Sulfide with Singly and Doubly Tucked-in Titanocenes. Organometallics 2011. [DOI: 10.1021/om1010726] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
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Pérez-Torrente JJ, Jiménez MV, Hernandez-Gruel MAF, Fabra MJ, Lahoz FJ, Oro LA. On the synthesis and chemical behaviour of the elusive bis(hydrosulfido)-bridged dinuclear rhodium(I) complexes [{Rh(mu-SH)(CO)(PR(3))}(2)]. Chemistry 2009; 15:12212-22. [PMID: 19856351 DOI: 10.1002/chem.200902249] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Several bis(hydrosulfido)-bridged dinuclear rhodium(I) compounds, [{Rh(mu-SH)(L)(2)}(2)], have been prepared from rhodium(I) acetylacetonato complexes, [Rh(acac)(L)(2)], and H(2)S(g). Reaction of [Rh(acac){P(OPh)(3)}(2)] with H(2)S(g) affords the dinuclear bis(hydrosulfido)-bridged compound [{Rh(mu-SH){P(OPh)(3)}(2)}(2)] (1). However, reaction of complexes [Rh(acac)(CO)(PR(3))] with H(2)S(g) gives the dinuclear compound [{Rh(mu-SH)(CO)(PR(3))}(2)] (R=Cy, 2; R=Ph, 4) and the trinuclear cluster [Rh(3)(mu-H)(mu(3)-S)(2)(CO)(3)(PR(3))(3)] (R=Cy, 3; R=Ph, 5). The selective synthesis of both type of compounds has been carried out by control of the H(2)S(g) concentration in the reaction media. The trinuclear hydrido-sulfido cluster [Rh(3)(mu-H)(mu(3)-S)(2)(CO)(3)(PPh(3))(3)] (5) has been also obtained by reaction of [{Rh(mu-SH)(CO)(PPh(3))}(2)] (4) with [Rh(acac)(CO)(PPh(3))], proceeding through the trinuclear hydrosulfido-sulfido intermediate [Rh(3)(mu(3)-SH)(mu(3)-S)(CO)(3)(PPh(3))(3)]. The molecular structures of complexes 1 and 3 have been determined by X-ray diffraction methods. Compound 1 is stable in solution, but complexes 2 and 4 slowly transform in solution into the trinuclear hydrido-sulfido clusters 3 and 5, respectively, with the release of H(2)S(g) in a reversible way. (1)H NMR kinetic experiments for the transformation of 4 into 5 have revealed that this transformation follows second-order-type kinetic. The following activation parameters, DeltaH( not equal)=24+/-3 kJ mol(-1) and of DeltaS( not equal)=-223+/-8 J K(-1) mol(-1), have been calculated from the determination of the second-order rate constants in the temperature range 30-45 degrees C. The large negative value of the activation entropy is consistent with an associative character of the rate-determining step. A plausible multistep mechanism based on the chemical behaviour of hydrosulfido-metal complexes and compatible with the kinetic behaviour has been proposed.
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Affiliation(s)
- Jesús J Pérez-Torrente
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009-Zaragoza, Spain.
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18
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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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19
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Hernandez-Gruel MAF, Dobrinovitch IT, Lahoz FJ, Oro LA, Pérez-Torrente JJ. The Anions [Cptt2Zr(μ-S)2M(CO)2]- (M = Rh, Ir) as Versatile Precursors for the Synthesis of Sulfido-Bridged Early−Late Heterotrimetallic (ELHT) Compounds. Organometallics 2007. [DOI: 10.1021/om700749n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marc A. F. Hernandez-Gruel
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009-Zaragoza, Spain
| | - Isabel T. Dobrinovitch
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009-Zaragoza, Spain
| | - Fernando J. Lahoz
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009-Zaragoza, Spain
| | - Luis A. Oro
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009-Zaragoza, Spain
| | - Jesús J. Pérez-Torrente
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009-Zaragoza, Spain
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Hernandez-Gruel MAF, Lahoz FJ, Dobrinovich IT, Modrego FJ, Oro LA, Pérez-Torrente JJ. Reversible Opening of the Triangular Structure of a Sulfido-Bridged ZrRh2 Early−Late Heterobimetallic Complex Induced by Bis-(diphenylphosphino)methane. Organometallics 2007. [DOI: 10.1021/om061092p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marc A. F. Hernandez-Gruel
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Fernando J. Lahoz
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Isabel T. Dobrinovich
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - F. Javier Modrego
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Luis A. Oro
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Jesús J. Pérez-Torrente
- Departamento de Química Inorgánica, Instituto Universitario de Catálisis Homogénea, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
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Wang JQ, Herberhold M, Jin GX. Formation of Cup-Shaped Metallic Clusters via B−H Activation at the B(3)/B(6) Site of an ortho-Carborane-1,2-dichalcogenolato Ligand. Organometallics 2006. [DOI: 10.1021/om060381a] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian-Qiang Wang
- Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Anorganische Chemie II, Universitaet Bayreuth, D-95440 Bayreuth, Germany
| | - Max Herberhold
- Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Anorganische Chemie II, Universitaet Bayreuth, D-95440 Bayreuth, Germany
| | - Guo-Xin Jin
- Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Anorganische Chemie II, Universitaet Bayreuth, D-95440 Bayreuth, Germany
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Jamali S, Nabavizadeh SM, Rashidi M. Oxidative Addition of Methyl Iodide to a New Type of Binuclear Platinum(II) Complex: a Kinetic Study. Inorg Chem 2005; 44:8594-601. [PMID: 16271001 DOI: 10.1021/ic0511064] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new organodiplatinum(II) complex cis,cis-[Me2Pt(mu-NN)(mu-dppm)PtMe2] (1), in which NN = phthalazine and dppm = bis(diphenylphosphino)methane, is synthesized by the reaction of cis,cis-[Me2Pt(mu-SMe2)(mu-dppm)PtMe2] with 1 equiv of NN. Complex 1 has a 5d(pi)(Pt) --> pi(imine) metal-to-ligand charge-transfer band in the visible region, which was used to easily follow the kinetics of its reaction with MeI. Meanwhile, the complex contains a robust bridging dppm ligand that holds the binuclear integrity during the reaction. A double MeI oxidative addition was observed, as shown by spectrophotometry and confirmed by a low-temperature 31P NMR study. The classical S(N)2 mechanism was suggested for both steps, and the involved intermediates were suggested. Consistent with the proposed mechanism, the rates of the reactions at different temperatures were slower in benzene than in acetone and large negative deltaS values were found in each step. However, some abnormalities were observed in the related rate constants and deltaS values, which were demonstrated to be due to the associative involvement of the polar acetone molecules in the reactions. The rates are almost 6 times slower in the second step as compared to the first step because of the electronic effects transmitted through the ligands and the steric effects.
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Affiliation(s)
- Sirous Jamali
- Chemistry Department, Persian Gulf University, Bushehr 75168, Iran
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