1
|
Perez-Jimenez M, Crimmin MR. Photochemical H 2 activation by an Zn-Fe heterometallic: a mechanistic investigation. Chem Sci 2024; 15:1424-1430. [PMID: 38274073 PMCID: PMC10806748 DOI: 10.1039/d3sc05966a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 12/14/2023] [Indexed: 01/27/2024] Open
Abstract
Addition of H2 to a Zn-Fe complex was observed to occur under photochemical conditions (390 or 428 nm LED) and leads to the formation of a heterometallic dihydride complex. The reaction does not occur under thermal conditions and DFT calculations suggest this is an endergonic, light driven process. Through a combined experimental and computational approach, the plausible mechanisms for H2 activation were investigated. Inhibition experiments, double-label cross-over experiments, radical trapping experiments, EPR spectroscopy and DFT calculations were used to gain insight into this system. The combined data are consistent with two plausible mechanisms, the first involving ligand dissociation followed by oxidative addition of H2 at the Fe centre, the second involving homolytic fragmentation of the Zn-Fe heterometallic and formation of radical intermediates.
Collapse
Affiliation(s)
- Marina Perez-Jimenez
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London 82 Wood Lane, White City London W12 0Z UK
| | - Mark R Crimmin
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London 82 Wood Lane, White City London W12 0Z UK
| |
Collapse
|
2
|
Liu J, Sum K, Groizard T, Halet JF, Johnson SA. Theoretical and DFT Study of Atypical Pentanuclear [( iPr 3P)Ni] 5H n ( n = 4, 6, 8) Clusters: What are the Rules? Inorg Chem 2023; 62:20888-20900. [PMID: 38069675 DOI: 10.1021/acs.inorgchem.3c03335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
The structure, bonding, and properties of a series of atypical pentanuclear nickel hydride clusters supported by electron-rich iPr3P of the type [(iPr3P)Ni]5Hn (n = 4, 6, 8; H4, H6, H8) and their anionic models where iPr3P are substituted by H- (H4', H6', H8') were investigated by density functional theory (DFT) calculations. All clusters were calculated to adopt a similar square pyramidal core geometry. Calculations indicate singlet ground states with small singlet-triplet gaps for H4 and H6, similar to previously reported experimental values. Molecular orbital theory description clusters were investigated using the simplified model complexes [HNi]5Hn5- (n = 4, 6, 8; H4', H6', H8'). The results show that there are three skeletal electron pairs (SEPs) in H4'. The addition of two molecules of H2 to form H6' and H8' results in the partial or full occupation of two degenerate MOs (e* set) that give two SEPs and one SEP, respectively. Indeed, the occupation of these low-lying weakly antibonding orbitals governs the multielectron chemistry available for these clusters and plays a role in their unique reactivity.
Collapse
Affiliation(s)
- Junyang Liu
- Department of Chemistry and Biochemistry, University of Windsor, Sunset Avenue 401, Windsor, Ontario N9B 3P4, Canada
| | - Kethya Sum
- Department of Chemistry and Biochemistry, University of Windsor, Sunset Avenue 401, Windsor, Ontario N9B 3P4, Canada
| | - Thomas Groizard
- Institut des Sciences Chimiques de Rennes (ISCR)─UMR 6226, Université Rennes, CNRS, F-35000 Rennes, France
- Laboratoire de Chimie Quantique, UMR7177, Institut Le Bel, Université de Strasbourg, CNRS, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Jean-François Halet
- Institut des Sciences Chimiques de Rennes (ISCR)─UMR 6226, Université Rennes, CNRS, F-35000 Rennes, France
- CNRS-Saint-Gobain─NIMS, IRL 3629, Laboratory for Innovative Key Materials and Structures (LINK), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan
| | - Samuel A Johnson
- Department of Chemistry and Biochemistry, University of Windsor, Sunset Avenue 401, Windsor, Ontario N9B 3P4, Canada
| |
Collapse
|
3
|
Dihydrogen attachment and dissociation reactions in Fe(H)2(H2)(PEtPh2)3: a DFT potential-energy scan. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02870-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Forson KG, Bohman BO, Wayment CZ, Owens RN, McKnight CE, Davis RC, Stillwell LR, Smith SJ, Michaelis DJ. Medium and Large N-Heterocycle Formation via Allene Hydroamination with a Bimetallic Rh(II) Catalyst. J Am Chem Soc 2021; 144:63-68. [PMID: 34965105 DOI: 10.1021/jacs.1c10534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the synthesis of a 2-phosphinoimidazole-derived bimetallic Rh(II) complex that enables intramolecular allene hydroamination to form 7- to 10-member rings in high yield. Monometallic Rh complexes, in contrast, fail to achieve any product formation. We demonstrate a broad substrate scope for formation of various N-heterocycles. Macrocyclizations that form 11- to 15-member N-heterocycles are also demonstrated. Mechanistic studies suggest that the reaction proceeds via reversible allene insertion with a Rh-hydride followed by C-N bond-forming reductive elimination. We hypothesize that the reactivity observed with our catalyst vs monometallic Rh complexes is derived from the bimetallic nature of our complex.
Collapse
Affiliation(s)
- Kelton G Forson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Benjamin O Bohman
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Coriantumr Z Wayment
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Rachel N Owens
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Caitlyn E McKnight
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Rhen C Davis
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Lillian R Stillwell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Stacey J Smith
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - David J Michaelis
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| |
Collapse
|
5
|
Takao T, Suzuki H, Shimogawa R. Syntheses and Properties of Triruthenium Polyhydrido Complexes Composed of 1,2,4-tri- tert-butylcyclopentadienyl and p-Cymene Ruthenium Units. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Toshiro Takao
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Hidenori Suzuki
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryuichi Shimogawa
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
6
|
Navarro M, Campos J. Bimetallic frustrated Lewis pairs. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2021. [DOI: 10.1016/bs.adomc.2021.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
7
|
Jurt P, Salnikov OG, Gianetti TL, Chukanov NV, Baker MG, Le Corre G, Borger JE, Verel R, Gauthier S, Fuhr O, Kovtunov KV, Fedorov A, Fenske D, Koptyug IV, Grützmacher H. Low-valent homobimetallic Rh complexes: influence of ligands on the structure and the intramolecular reactivity of Rh-H intermediates. Chem Sci 2019; 10:7937-7945. [PMID: 31673319 PMCID: PMC6788510 DOI: 10.1039/c9sc02683e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 07/05/2019] [Indexed: 01/02/2023] Open
Abstract
Supporting two metal binding sites by a tailored polydentate trop-based (trop = 5H-dibenzo[a,d]cyclohepten-5-yl) ligand yields highly unsymmetric homobimetallic rhodium(i) complexes. These were studied as models for Rh/C hydrogenation catalysts.
Supporting two metal binding sites by a tailored polydentate trop-based (trop = 5H-dibenzo[a,d]cyclohepten-5-yl) ligand yields highly unsymmetric homobimetallic rhodium(i) complexes. Their reaction with hydrogen rapidly forms Rh hydrides that undergo an intramolecular semihydrogenation of two C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
C bonds of the trop ligand. This reaction is chemoselective and converts C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
C bonds to a bridging carbene and an olefinic ligand in the first and the second semihydrogenation steps, respectively. Stabilization by a bridging diphosphine ligand allows characterization of a Rh hydride species by advanced NMR techniques and may provide insight into possible elementary steps of H2 activation by interfacial sites of heterogeneous Rh/C catalysts.
Collapse
Affiliation(s)
- Pascal Jurt
- Department of Chemistry and Applied Biosciences , ETH Zürich , Switzerland .
| | - Oleg G Salnikov
- International Tomography Center , SB RAS , Novosibirsk , Russia.,Novosibirsk State University , Novosibirsk , Russia
| | - Thomas L Gianetti
- Department of Chemistry and Applied Biosciences , ETH Zürich , Switzerland . .,Department of Chemistry and Biochemistry , University of Arizona , Tucson , USA .
| | - Nikita V Chukanov
- International Tomography Center , SB RAS , Novosibirsk , Russia.,Novosibirsk State University , Novosibirsk , Russia
| | - Matthew G Baker
- Department of Chemistry and Applied Biosciences , ETH Zürich , Switzerland .
| | - Grégoire Le Corre
- Department of Chemistry and Applied Biosciences , ETH Zürich , Switzerland .
| | - Jaap E Borger
- Department of Chemistry and Applied Biosciences , ETH Zürich , Switzerland .
| | - Rene Verel
- Department of Chemistry and Applied Biosciences , ETH Zürich , Switzerland .
| | | | - Olaf Fuhr
- Institute of Nanotechnology , Karlsruhe Institute of Technology (KIT) , Eggenstein-Leopoldshafen , Germany
| | - Kirill V Kovtunov
- International Tomography Center , SB RAS , Novosibirsk , Russia.,Novosibirsk State University , Novosibirsk , Russia
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences , ETH Zürich , Switzerland . .,Department of Mechanical and Process Engineering , ETH Zürich , Switzerland
| | - Dieter Fenske
- Institute of Nanotechnology , Karlsruhe Institute of Technology (KIT) , Eggenstein-Leopoldshafen , Germany
| | - Igor V Koptyug
- International Tomography Center , SB RAS , Novosibirsk , Russia.,Novosibirsk State University , Novosibirsk , Russia
| | | |
Collapse
|
8
|
Xu X, Sun Z, Meng L, Zheng S, Li X. A comparative study on the reaction mechanisms of Cp2MH2(M = Cr, Mo, W) with HBF4. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4790] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xia Xu
- College of Chemistry and Material Science; Hebei Normal University; Road East of 2nd Ring South Shijiazhuang 050024 China
| | - Zheng Sun
- College of Chemistry and Material Science; Hebei Normal University; Road East of 2nd Ring South Shijiazhuang 050024 China
| | - Lingpeng Meng
- College of Chemistry and Material Science; Hebei Normal University; Road East of 2nd Ring South Shijiazhuang 050024 China
- National Demonstratin Center for Experimental Chemistry; Hebei Normal University; Road East of 2nd Ring South Shijiazhuang 050024 China
| | - Shijun Zheng
- College of Chemistry and Material Science; Hebei Normal University; Road East of 2nd Ring South Shijiazhuang 050024 China
| | - Xiaoyan Li
- College of Chemistry and Material Science; Hebei Normal University; Road East of 2nd Ring South Shijiazhuang 050024 China
- National Demonstratin Center for Experimental Chemistry; Hebei Normal University; Road East of 2nd Ring South Shijiazhuang 050024 China
| |
Collapse
|
9
|
The effect of the counteranion on the loss of hydrogen from cationic ruthenium dihydrogen complexes in the solid state. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.09.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
10
|
|
11
|
Chakraborty U, Reyes‐Rodriguez E, Demeshko S, Meyer F, Jacobi von Wangelin A. A Manganese Nanosheet: New Cluster Topology and Catalysis. Angew Chem Int Ed Engl 2018; 57:4970-4975. [PMID: 29436771 PMCID: PMC5969092 DOI: 10.1002/anie.201800079] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/05/2018] [Indexed: 01/12/2023]
Abstract
While the coordination chemistry of monometallic complexes and the surface characteristics of larger metal particles are well understood, preparations of molecular metallic nanoclusters remain a great challenge. Discrete planar metal clusters constitute nanoscale snapshots of cluster growth but are especially rare owing to the strong preference for three-dimensional structures and rapid aggregation or decomposition. A simple ligand-exchange procedure has led to the formation of a novel heteroleptic Mn6 nanocluster that crystallized in an unprecedented flat-chair topology and exhibited unique magnetic and catalytic properties. Magnetic susceptibility studies documented strong electronic communication between the manganese ions. Reductive activation of the molecular Mn6 cluster enabled catalytic hydrogenations of alkenes, alkynes, and imines.
Collapse
Affiliation(s)
- Uttam Chakraborty
- Department of ChemistryUniversity ofRegensburgGermany
- Department of ChemistryUniversity of HamburgMartin Luther King Pl. 620146HamburgGermany
| | | | - Serhiy Demeshko
- University of GöttingenInstitute of Inorganic ChemistryTammannstraße 437077GöttingenGermany
| | - Franc Meyer
- University of GöttingenInstitute of Inorganic ChemistryTammannstraße 437077GöttingenGermany
| | - Axel Jacobi von Wangelin
- Department of ChemistryUniversity ofRegensburgGermany
- Department of ChemistryUniversity of HamburgMartin Luther King Pl. 620146HamburgGermany
| |
Collapse
|
12
|
Chakraborty U, Reyes-Rodriguez E, Demeshko S, Meyer F, Jacobi von Wangelin A. A Manganese Nanosheet: New Cluster Topology and Catalysis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800079] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Uttam Chakraborty
- Department of Chemistry; University of; Regensburg Germany
- Department of Chemistry; University of Hamburg; Martin Luther King Pl. 6 20146 Hamburg Germany
| | | | - Serhiy Demeshko
- University of Göttingen; Institute of Inorganic Chemistry; Tammannstraße 4 37077 Göttingen Germany
| | - Franc Meyer
- University of Göttingen; Institute of Inorganic Chemistry; Tammannstraße 4 37077 Göttingen Germany
| | - Axel Jacobi von Wangelin
- Department of Chemistry; University of; Regensburg Germany
- Department of Chemistry; University of Hamburg; Martin Luther King Pl. 6 20146 Hamburg Germany
| |
Collapse
|
13
|
Sagawa T, Tsukada S, Yamamoto K, Gunji T. Synthesis and reactivity of hydride-bridged ruthenium dithiolene complexes. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.10.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
14
|
Manz DH, Duan PC, Dechert S, Demeshko S, Oswald R, John M, Mata RA, Meyer F. Pairwise H 2/D 2 Exchange and H 2 Substitution at a Bimetallic Dinickel(II) Complex Featuring Two Terminal Hydrides. J Am Chem Soc 2017; 139:16720-16731. [PMID: 29037034 DOI: 10.1021/jacs.7b08629] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A compartmental ligand scaffold HL with two β-diketiminato binding sites spanned by a pyrazolate bridge gave a series of dinuclear nickel(II) dihydride complexes M[LNi2(H)2], M = Na (Na·2) and K (K·2), which were isolated after reacting the precursor complex [LNi2(μ-Br)] (1) with MHBEt3 (M = Na and K). Crystallographic characterization showed the two hydride ligands to be directed into the bimetallic pocket, closely interacting with the alkali metal cation. Treatment of K·2 with dibenzo(18-crown-6) led to the separated ion pair [LNi2(H)2][K(DB18C6)] (2[K(DB18C6)]). Reaction of Na·2 or K·2 with D2 was investigated by a suite of 1H and 2H NMR experiments, revealing an unusual pairwise H2/D2 exchange process that synchronously involves both Ni-H moieties without H/D scrambling. A mechanistic picture was provided by DFT calculations which suggested facile recombination of the two terminal hydrides within the bimetallic cleft, with a moderate enthalpic barrier of ∼62 kJ/mol, to give H2 and an antiferromagnetically coupled [LNiI2]- species. This was confirmed by SQUID monitoring during H2 release from solid 2[K(DB18C6)]. Interaction with the Lewis acid cation (Na+ or K+) significantly stabilizes the dihydride core. Kinetic data for the M[L(Ni-H)2] → H2 transition derived from 2D 1H EXSY spectra confirmed first-order dependence of H2 release on M·2 concentration and a strong effect of the alkali metal cation M+. Treating [LNi2(D)2]- with phenylacetylene led to D2 and dinickel(II) complex 3- with a twice reduced styrene-1,2-diyl bridging unit in the bimetallic pocket. Complexes [LNiII2(H)2]- having two adjacent terminal hydrides thus represent a masked version of a highly reactive dinickel(I) core. Storing two reducing equivalents in adjacent metal hydrides that evolve H2 upon substrate binding is reminiscent of the proposed N2 binding step at the FeMo cofactor of nitrogenase, suggesting the use of the present bimetallic scaffold for reductive bioinspired activation of a range of inert small molecules.
Collapse
Affiliation(s)
- Dennis-Helmut Manz
- Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Peng-Cheng Duan
- Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Sebastian Dechert
- Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Serhiy Demeshko
- Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Rainer Oswald
- Institut für Physikalische Chemie, Universität Göttingen , Tammannstrasse 6, D-37077 Göttingen, Germany
| | - Michael John
- Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Ricardo A Mata
- Institut für Physikalische Chemie, Universität Göttingen , Tammannstrasse 6, D-37077 Göttingen, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, D-37077 Göttingen, Germany
| |
Collapse
|
15
|
Etezadi S, Koppaka A, Gamage MM, Captain B. Investigations of tri-t-butyl tin hydride complexes of transition metals in small molecule activation and catalysis. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.07.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
16
|
Anderton KJ, Knight BJ, Rheingold AL, Abboud KA, García-Serres R, Murray LJ. Reactivity of hydride bridges in a high-spin [Fe 3(μ-H) 3] 3+ cluster: reversible H 2/CO exchange and Fe-H/B-F bond metathesis. Chem Sci 2017; 8:4123-4129. [PMID: 28603601 PMCID: PMC5443887 DOI: 10.1039/c6sc05583d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/27/2017] [Indexed: 01/08/2023] Open
Abstract
The triiron trihydride complex Fe3H3L (1) [where L3– is a tris(β-diketiminate)cyclophanate] reacts with CO and with BF3·OEt2 to afford (FeICO)2FeII(μ3-H)L (2) and Fe3F3L (3), respectively.
The triiron trihydride complex Fe3H3L (1) [where L3– is a tris(β-diketiminate)cyclophanate] reacts with CO and with BF3·OEt2 to afford (FeICO)2FeII(μ3-H)L (2) and Fe3F3L (3), respectively. Variable-temperature and applied-field Mössbauer spectroscopy support the assignment of two high-spin (HS) iron(i) centers and one HS iron(ii) ion in 2. Preliminary studies support a CO-induced reductive elimination of H2 from 1, rather than CO trapping a species from an equilibrium mixture. This complex reacts with H2 to regenerate 1 under a dihydrogen atmosphere, which represents a rare example of reversible CO/H2 exchange and the first to occur at high-spin metal centers, as well as the first example of a reversible multielectron redox reaction at a designed high-spin metal cluster. The formation of 3 proceeds through a previously unreported net fluoride-for-hydride substitution, and 3 is surprisingly chemically inert to Si–H bonds and points to an unexpectedly large difference between the Fe–F and Fe–H bonds in this high-spin system.
Collapse
Affiliation(s)
- Kevin J Anderton
- Center for Catalysis , University of Florida , 214 Leigh Hall P.O. Box 117200 , Gainesville , FL 32611 , USA .
| | - Brian J Knight
- Center for Catalysis , University of Florida , 214 Leigh Hall P.O. Box 117200 , Gainesville , FL 32611 , USA .
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry , University of California San Diego , 9500 Gilman Drive, MC 0358 , La Jolla , CA 92093-0358 , USA
| | - Khalil A Abboud
- Department of Chemistry , University of Florida , 214 Leigh Hall P.O. Box 117200 , Gainesville , FL 32611 , USA
| | - Ricardo García-Serres
- Laboratoire de Chimie de Biologie des Métaux , UMR 5249 , Université Joseph Fourier , Grenoble-1, CNRS-CEA 17 Rue des Martyrs , 38054 Grenoble Cedex 9 , France
| | - Leslie J Murray
- Center for Catalysis , University of Florida , 214 Leigh Hall P.O. Box 117200 , Gainesville , FL 32611 , USA .
| |
Collapse
|
17
|
Chadwick FM, Olliff N, Weller AS. A convenient route to a norbornadiene adduct of iridium with chelating phosphines, [Ir(R2PCH2CH2PR2)(NBD)][BAr4F] and a comparison of reactivity with H2 in solution and the solid–state. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2015.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
18
|
Bandini AL. Farther study on the reactivity of cationic dinuclear platinum trihydrido compounds with unsaturated hydrocarbons: Synthesis of μ-hydrido μ-alkylidene complexes, NMR characterization and mechanism insights. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.05.065] [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]
|
19
|
Sharninghausen LS, Mercado BQ, Crabtree RH, Balcells D, Campos J. Gel-assisted crystallization of [Ir4(IMe)7(CO)H10]2+ and [Ir4(IMe)8H9]3+ clusters derived from catalytic glycerol dehydrogenation. Dalton Trans 2015; 44:18403-10. [DOI: 10.1039/c5dt03302k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two unique Ir4 clusters isolated during catalytic glycerol dehydrogenation, crystallized using aqueous and organic gel matrices and displaying remarkable structural features are described.
Collapse
Affiliation(s)
| | | | | | - David Balcells
- The Centre for Theoretical and Computational Chemistry (CTCC)
- Department of Chemistry, University of Oslo
- N-0315 Oslo
- Norway
| | | |
Collapse
|
20
|
Buchwalter P, Rosé J, Braunstein P. Multimetallic catalysis based on heterometallic complexes and clusters. Chem Rev 2014; 115:28-126. [PMID: 25545815 DOI: 10.1021/cr500208k] [Citation(s) in RCA: 557] [Impact Index Per Article: 55.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Paulin Buchwalter
- Laboratoire de Chimie de Coordination (UMR 7177 CNRS), Institut Le Bel - Université de Strasbourg , 4, rue Blaise Pascal F-67081, Strasbourg, France
| | | | | |
Collapse
|
21
|
Girod M, Krstić M, Antoine R, MacAleese L, Lemoine J, Zavras A, Khairallah GN, Bonačić-Koutecký V, Dugourd P, O'Hair RAJ. Formation and Characterisation of the Silver Hydride Nanocluster Cation [Ag3H2((Ph2P)2CH2)]+and Its Release of Hydrogen. Chemistry 2014; 20:16626-33. [DOI: 10.1002/chem.201404110] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Indexed: 01/30/2023]
|
22
|
Campos J, Sharninghausen LS, Crabtree RH, Balcells D. A Carbene-Rich but Carbonyl-Poor [Ir6(IMe)8(CO)2H14]2+Polyhydride Cluster as a Deactivation Product from Catalytic Glycerol Dehydrogenation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407997] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
23
|
Campos J, Sharninghausen LS, Crabtree RH, Balcells D. A Carbene-Rich but Carbonyl-Poor [Ir6(IMe)8(CO)2H14]2+Polyhydride Cluster as a Deactivation Product from Catalytic Glycerol Dehydrogenation. Angew Chem Int Ed Engl 2014; 53:12808-11. [DOI: 10.1002/anie.201407997] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Indexed: 11/08/2022]
|
24
|
Dugan T, Bill E, MacLeod KC, Brennessel WW, Holland PL. Synthesis, spectroscopy, and hydrogen/deuterium exchange in high-spin iron(II) hydride complexes. Inorg Chem 2014; 53:2370-80. [PMID: 24555749 PMCID: PMC3993920 DOI: 10.1021/ic4013137] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Indexed: 01/05/2023]
Abstract
Very few hydride complexes are known in which the metals have a high-spin electronic configuration. We describe the characterization of several high-spin iron(II) hydride/deuteride isotopologues and their exchange reactions with one another and with H2/D2. Though the hydride/deuteride signal is not observable in NMR spectra, the choice of isotope has an influence on the chemical shifts of distant protons in the dimers through the paramagnetic isotope effect on chemical shift. This provides the first way to monitor the exchange of H and D in the bridging positions of these hydride complexes. The rate of exchange depends on the size of the supporting ligand, and this is consistent with the idea that H2/D2 exchange into the hydrides occurs through the dimeric complexes rather than through a transient monomer. The understanding of H/D exchange mechanisms in these high-spin iron hydride complexes may be relevant to postulated nitrogenase mechanisms.
Collapse
Affiliation(s)
- Thomas
R. Dugan
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Eckhard Bill
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, Mülheim
an der Ruhr, Germany
| | - K. Cory MacLeod
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - William W. Brennessel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Patrick L. Holland
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| |
Collapse
|
25
|
Zavras A, Khairallah GN, Connell TU, White JM, Edwards AJ, Donnelly PS, O'Hair RAJ. Synthesis, Structure and Gas-Phase Reactivity of a Silver Hydride Complex [Ag3{(PPh2)2CH2}3(μ3-H)(μ3-Cl)]BF4. Angew Chem Int Ed Engl 2013; 52:8391-4. [DOI: 10.1002/anie.201302436] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Indexed: 11/09/2022]
|
26
|
Zavras A, Khairallah GN, Connell TU, White JM, Edwards AJ, Donnelly PS, O'Hair RAJ. Synthesis, Structure and Gas-Phase Reactivity of a Silver Hydride Complex [Ag3{(PPh2)2CH2}3(μ3-H)(μ3-Cl)]BF4. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302436] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
27
|
Antiñolo A, Pérez-Flores JC, Hervás MJ, García-Yuste S, López-Solera MI, Otero A, Fernández-Pacheco AR, Tercero-Morales MT. Synthesis and Reactivity of New Niobocene Hydride-Stibine and Hydride-Stilbene Complexes. X-ray Crystal Structure of [Nb(η5-C5H4SiMe3)2(H)(trans-η2-C,C-PhCH═CHPh)]. Organometallics 2013. [DOI: 10.1021/om301171j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Antonio Antiñolo
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José
Cela, 10, 13071-Ciudad Real, Spain
| | - Juan-Carlos Pérez-Flores
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José
Cela, 10, 13071-Ciudad Real, Spain
| | - Maria Jesús Hervás
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José
Cela, 10, 13071-Ciudad Real, Spain
| | - Santiago García-Yuste
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José
Cela, 10, 13071-Ciudad Real, Spain
| | - Maria Isabel López-Solera
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José
Cela, 10, 13071-Ciudad Real, Spain
| | - Antonio Otero
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José
Cela, 10, 13071-Ciudad Real, Spain
| | | | - Maria Teresa Tercero-Morales
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José
Cela, 10, 13071-Ciudad Real, Spain
| |
Collapse
|
28
|
Beck R, Shoshani M, Johnson SA. Catalytic Hydrogen/Deuterium Exchange of Unactivated Carbon-Hydrogen Bonds by a Pentanuclear Electron-Deficient Nickel Hydride Cluster. Angew Chem Int Ed Engl 2012; 51:11753-6. [DOI: 10.1002/anie.201205943] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 09/26/2012] [Indexed: 11/08/2022]
|
29
|
Beck R, Shoshani M, Johnson SA. Catalytic Hydrogen/Deuterium Exchange of Unactivated Carbon-Hydrogen Bonds by a Pentanuclear Electron-Deficient Nickel Hydride Cluster. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205943] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
30
|
Syntheses, structures, and anticancer activity of novel organometallic ruthenium–maltol complexes. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2011.12.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
31
|
Teets TS, Cook TR, McCarthy BD, Nocera DG. Redox chemistry, acid reactivity, and hydrogenation reactions of two-electron mixed valence diiridium and dirhodium complexes. Inorg Chem 2011; 50:5223-33. [PMID: 21557564 DOI: 10.1021/ic2005248] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The syntheses and reaction chemistry of two electron mixed-valence diphosphazane-bridged dirhodium and diiridium complexes M(2)(0,II)(tfepma)(2)(CN(t)Bu)(2)Cl(2) [M = Rh (1), Ir (2); tfepma = MeN[P(OCH(2)CF(3))(2)](2), CN(t)Bu = tert-butyl isocyanide] are described. 1 and 2 undergo addition and two-electron oxidation and reduction chemistries. In the presence of CN(t)Bu, the addition product with the stoichiometry M(2)(0,II)(tfepma)(2)(CN(t)Bu)(3)Cl(2) [M = Rh (3), Ir (3)] is generated; in the presence of 1 equiv of CN(t)Bu and 2 equiv of bis(pentamethyl-cyclopentadienyl)cobalt(II), 1 and 2 are reduced to furnish M(2)(0,0)(tfepma)(2)(CN(t)Bu)(3) [M = Rh (5), Ir (6)], which feature both four- and five-coordinate M(0) centers. Complexes 1, 2, 5, and 6 all possess coordinatively unsaturated square planar M(0) centers that are reactive: (1) 2 reacts with PhICl(2) to produce Ir(2)(II,II)(tfepma)(2)(CN(t)Bu)(2)Cl(4) (7); (2) protonation of 2 with HX yields Ir(2)(II,II)(tfepma)(2)(CN(t)Bu)(2)Cl(2)HX [X = Cl(-) (8), OTs(-) (9)]; (3) protonation of 5 with HOTs produces [Rh(2)(I,I)(tfepma)(2)(CN(t)Bu)(3)(μ-H)](OTs); and (4) the reversible hydrogenation of 2 proceeds smoothly, furnishing the cis-dihydride complex Ir(2)(II,II)(tfepma)(2)(CN(t)Bu)(2)(H)(2)Cl(2) (11). Substitution of tfepma in 2 with bis(diphenylphsophino)methane (dppm) yields the orthometalated complex Ir(2)(II,II)(dppm)(PPh(o-C(6)H(4))CH(2)PPh(2))(CN(t)Bu)(2)Cl(2)H (12). The X-ray crystal structures of 11 compounds are presented and discussed, and spectroscopic characterization by multinuclear and variable temperature NMR provides details about solution structures and in some cases the formation of isomeric products. The electronic spectra of the new complexes are also described briefly, with absorption and emission features derived from the bimetallic core.
Collapse
Affiliation(s)
- Thomas S Teets
- Department of Chemistry, 6-335, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, USA
| | | | | | | |
Collapse
|
32
|
Belkova NV, Epstein LM, Shubina ES. Dihydrogen Bonding, Proton Transfer and Beyond: What We Can Learn from Kinetics and Thermodynamics. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000546] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Natalia V. Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia, Fax: +7‐495‐1355085
| | - Lina M. Epstein
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia, Fax: +7‐495‐1355085
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia, Fax: +7‐495‐1355085
| |
Collapse
|
33
|
Yempally V, Zhu L, Captain B. Reversible Hydrogen Activation by the Pt Complex Pt(SntBu3)2(CNtBu)2. Inorg Chem 2010; 49:7238-40. [DOI: 10.1021/ic101025h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Veeranna Yempally
- Department of Chemistry, University of Miami, Coral Gables, Florida 33124
| | - Lei Zhu
- Department of Chemistry, University of Miami, Coral Gables, Florida 33124
| | - Burjor Captain
- Department of Chemistry, University of Miami, Coral Gables, Florida 33124
| |
Collapse
|
34
|
Leoni P, Marchetti L, Bonuccelli V, Mohapatra S, Albinati A, Rizzato S. Proton-Transfer Reactions on Hexanuclear Platinum Clusters: Reversible Heterolytic Cleavage of H2 and CH Activation Affording a Linear, Cluster-Containing Polymer. Chemistry 2010; 16:9468-77. [DOI: 10.1002/chem.201000809] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
35
|
Mastrorilli P, Latronico M, Gallo V, Polini F, Re N, Marrone A, Gobetto R, Ellena S. Facile activation of dihydrogen by a phosphinito-bridged Pt(I)-Pt(I) complex. J Am Chem Soc 2010; 132:4752-65. [PMID: 20222682 DOI: 10.1021/ja909747r] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The phosphinito-bridged Pt(I) complex [(PHCy(2))Pt(mu-PCy(2)){kappa(2)P,O-mu-P(O)Cy(2)}Pt(PHCy(2))](Pt-Pt) (1) reversibly adds H(2) under ambient conditions, giving cis-[(H)(PHCy(2))Pt(1)(mu-PCy(2))(mu-H)Pt(2)(PHCy(2)){kappaP-P(O)Cy(2)}](Pt-Pt) (2). Complex 2 slowly isomerizes spontaneously into the corresponding more stable isomer trans-[(PHCy(2))(H)Pt(mu-PCy(2))(mu-H)Pt(PHCy(2)){kappaP-P(O)Cy(2)}](Pt-Pt) (3). DFT calculations indicate that the reaction of 1 with H(2) occurs through an initial heterolytic splitting of the H(2) molecule assisted by the phosphinito oxygen with breaking of the Pt-O bond and hydrogenation of the Pt and O atoms, leading to the formation of the intermediate [(PHCy(2))(H)Pt(mu-PCy(2))Pt(PHCy(2)){kappaP-P(OH)Cy(2)}](Pt-Pt) (D), where the two split hydrogen atoms interact within a six-membered Pt-H...H-O-P-Pt ring. Compound D is a labile intermediate which easily evolves into the final dihydride complex 2 through a facile (9-15 kcal mol(-1), depending on the solvent) hydrogen shift from the phosphinito oxygen to the Pt-Pt bond. Information obtained by addition of para-H(2) on 1 are in agreement with the presence of a heterolytic pathway in the 1 --> 2 transformation. NMR experiments and DFT calculations also gave evidence for the nonclassical dihydrogen complex [(PHCy(2))(eta(2)-H(2))Pt(mu-PCy(2))Pt(PHCy(2)){kappaP-P(O)Cy(2)}](Pt-Pt) (4), which is an intermediate in the dehydrogenation of 2 to 1 and is also involved in intramolecular and intermolecular exchange processes. Experimental and DFT studies showed that the isomerization 2 --> 3 occurs via an intramolecular mechanism essentially consisting of the opening of the Pt-Pt bond and of the hydrogen bridge followed by the rotation of the coordination plane of the Pt center with the terminal hydride ligand.
Collapse
Affiliation(s)
- Piero Mastrorilli
- Dipartimento di Ingegneria delle Acque e di Chimica del Politecnico di Bari, Via Orabona 4, I-70125 Bari, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Hiney RM, Chaplin AB, Harmer J, Green JC, Weller AS. Using EPR to follow reversible dihydrogen addition to paramagnetic clusters of high hydride count: [Rh(6)(PCy(3))(6)H(12)](+) and [Rh(6)(PCy(3))(6)H(14)](+). Dalton Trans 2010; 39:1726-33. [PMID: 20449414 DOI: 10.1039/b919209c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combined structural/EPR/computational chemistry investigation is reported on the two paramagnetic hydrido-cluster salts [Rh(6)(PCy(3))(6)H(12)][BAr(F)(4)] and [Rh(6)(PCy(3))(6)H(14)][BAr(F)(4)], the latter being formed by reversible addition of H(2) to the former, [BAr(F)(4)](-) = [B{C(6)H(3)(CF(3))(2)}(4)](-). The solid-state structure of [Rh(6)(PCy(3))(6)H(14)][BAr(F)(4)] shows an expanded cluster core compared to previously reported [Rh(6)(PCy(3))(6)H(12)][BAr(F)(4)] indicative of the addition of hydrogen to the cluster surface. This expansion correlates well with the calculated (PH(3) replaces PCy(3)) structures. EPR measurements on [Rh(6)(PCy(3))(6)H(12)][BAr(F)(4)] indicate two isomers at low temperature, which are tentatively assigned as diastereomers that result from locked phosphine rotation and bridging hydride/semi bridging hydride tautomerism. The EPR signal disappears above 60 K which is suggested to occur due to fast Raman-type relaxation-a phenomenon consistent with the calculated small SOMO/SOMO - 1 and SOMO/LUMO gaps. For [Rh(6)(PCy(3))(6)H(14)][BAr(F)(4)] EPR measurements indicate two isomers, the proportion of which change with temperature and deuteration-one axial isomer and one rhombic isomer. DFT calculations on a number of plausible isomers give EPR parameters which fit the experimentally determined rhombic isomer to one in which there is an interstitial hydride in the cluster and thirteen hydride ligands on the surface, while the axial isomer has two dihydrogen-like ligands on the cluster surface. That these isomers lie close in energy comes from both the EPR measurements (as measured from equilibrium constants over a variable temperature range) and DFT calculations. Deuteration of the hydrides should favour the isomer with the lowest zero-point energy and this is the case, with the axial isomer (two D(2) ligands on the surface) being favoured over the rhombic.
Collapse
Affiliation(s)
- Rachel M Hiney
- Department of Chemistry, Inorganic Chemistry Laboratories, University of Oxford, South Parks Road, Oxford, UKOX1 3QR
| | | | | | | | | |
Collapse
|
37
|
Hiney RM, Marken F, Raithby PR, Weller AS. Aqueous-organic biphasic redox-chemistry of high-hydride content rhodium clusters: Towards immobilisation of redox-switchable H2 binding materials on a surface. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
38
|
Anderson BG, Hoyte SA, Spencer JL. Synthesis and Characterization of the Dinuclear Polyhydrides [Os2H7(PPhiPr2)4]+ and [Os2H6(PPhiPr2)4]. Inorg Chem 2009; 48:7977-83. [DOI: 10.1021/ic900111s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bradley G. Anderson
- School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Sarah A. Hoyte
- School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - John L. Spencer
- School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| |
Collapse
|
39
|
Rousseau R, Schenter GK, Fulton JL, Linehan JC, Engelhard MH, Autrey T. Defining Active Catalyst Structure and Reaction Pathways from ab Initio Molecular Dynamics and Operando XAFS: Dehydrogenation of Dimethylaminoborane by Rhodium Clusters. J Am Chem Soc 2009; 131:10516-24. [DOI: 10.1021/ja901480u] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roger Rousseau
- Fundamental & Computer Sciences Directorate, and W. R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Gregory K. Schenter
- Fundamental & Computer Sciences Directorate, and W. R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - John L. Fulton
- Fundamental & Computer Sciences Directorate, and W. R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - John C. Linehan
- Fundamental & Computer Sciences Directorate, and W. R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Mark H. Engelhard
- Fundamental & Computer Sciences Directorate, and W. R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Thomas Autrey
- Fundamental & Computer Sciences Directorate, and W. R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| |
Collapse
|
40
|
Xu Y, Celik MA, Thompson AL, Cai H, Yurtsever M, Odell B, Green JC, Mingos DMP, Brown JM. Tetrameric iridium hydride-rich clusters formed under hydrogenation conditions. Angew Chem Int Ed Engl 2009; 48:582-5. [PMID: 19067451 DOI: 10.1002/anie.200804484] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yingjian Xu
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Rd., Oxford OX1 3TA, UK
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Xu Y, Celik M, Thompson A, Cai H, Yurtsever M, Odell B, Green J, Mingos D, Brown J. Tetrameric Iridium Hydride-Rich Clusters Formed under Hydrogenation Conditions. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200804484] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
42
|
Besora M, Carreón-Macedo JL, Cimas Á, Harvey JN. Spin-state changes and reactivity in transition metal chemistry: Reactivity of iron tetracarbonyl. ADVANCES IN INORGANIC CHEMISTRY 2009. [DOI: 10.1016/s0898-8838(09)00210-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
43
|
Adams RD, Hall MB, Pearl WC, Yang X. Transformations and Reactions of Re2(CO)8(μ-SbPh2)(μ-H) Induced by the Addition of a Platinum(tri-t-butylphosphine) Group. Inorg Chem 2008; 48:652-62. [DOI: 10.1021/ic801876s] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard D. Adams
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, and Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255
| | - Michael B. Hall
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, and Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255
| | - William C. Pearl
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, and Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255
| | - Xinzheng Yang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, and Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255
| |
Collapse
|
44
|
|