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Polukeev AV, Capelli SC, Wendt OF. Unravelling strong temperature-dependence of JHD in transition metal hydrides: solvation and non-covalent interactions versus temperature-elastic H-H bonds. Chem Sci 2023; 14:12308-12320. [PMID: 37969611 PMCID: PMC10631239 DOI: 10.1039/d3sc04197b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/12/2023] [Indexed: 11/17/2023] Open
Abstract
A number of transition metal hydrides reveal intriguing temperature-dependent JHD in their deuterated derivatives and possibly the temperature dependent hydrogen-hydrogen distance (r(H-H)) as well. Previously, theoretical studies rationalized JHD and r(H-H) changes in such compounds through a "temperature-elastic" structure model with a significant population of vibrational states in an anharmonic potential. Based on the first variable temperature neutron diffraction study of a relevant complex, (p-H-POCOP)IrH2, observation of its elusive counterpart with longer r(H-H), crystallized as an adduct with C6F5I, and thorough spectroscopic and computational study, we argue that the model involving isomeric species in solution at least in some cases is more relevant. The existence of such isomers is enabled or enhanced by solvation and weak non-covalent interactions with solvent, such as halogen or dihydrogen bonds. "Non-classical" hydrides with r(H-H) ≈ 1.0-1.6 Å are especially sensitive to the above-mentioned factors.
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Affiliation(s)
- Alexey V Polukeev
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University PO Box 124 22100 Lund Sweden
| | - Silvia C Capelli
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory Harwell Science Campus Didcot OX11 0QX UK
| | - Ola F Wendt
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University PO Box 124 22100 Lund Sweden
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2
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Agrawal NK, Dash SR, Vanka K, Jagirdar BR. Dual Routes toward Observation of a trans-H 2/Hydride Complex in an Iridium Pincer System and Hydrogenation Catalytic Activity. Organometallics 2023. [DOI: 10.1021/acs.organomet.2c00641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Nisha K. Agrawal
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Soumya R. Dash
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kumar Vanka
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Balaji R. Jagirdar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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3
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Linke A, Decker D, Drexler HJ, Beweries T. Iridium(III) bis(thiophosphinite) pincer complexes: synthesis, ligand activation and applications in catalysis. Dalton Trans 2022; 51:10266-10271. [PMID: 35748648 DOI: 10.1039/d2dt01633h] [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
Iridium(III) bis(thiophosphinite) complexes of the type [(RPSCSPR)Ir(H)(Cl)(py)] (RPSCSPR = κ3-(2,6-SPR2)C6H3) (R = tBu, iPr, Ph) can be prepared from the ligand precursors 1,3-(SPR2)C6H4 by C-H activation at Ir using [Ir(COE)2Cl]2 or [Ir(COD)Cl]2. Optimisation of the protocol for complexation showed that direct cyclometallation in the absence or presence of pyridine, as well as C-H activation in the presence of H2 are viable options that, depending on the phosphine substituent furnish the five-coordinate Ir(III) hydride chloride complexes 2-R or the base stabilised species 3-R in good yields. In case of the PhPSCSPPh ligand, P-S activation results in the formation of a thiophosphine stabilised Ir(III) hydride complex [(PhPSCSPPh)Ir(H)(Cl)(PPh2SH)] (4). Reaction of 2-tBu with H2 in the presence of base furnishes an Ir(III) dihydride complex (5) via a labile Ir(III) dihydride-dihydrogen complex (6). All complexes are inactive for transfer dehydrogenation of cyclooctane in the presence of NaOtBu and tert-butylethylene, likely due to decomposition of the Ir complex in the presence of base at higher temperature.
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Affiliation(s)
- Alexander Linke
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
| | - David Decker
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
| | - Hans-Joachim Drexler
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
| | - Torsten Beweries
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
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4
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Recent advances in the chemistry of group 9—Pincer organometallics. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2019.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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5
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Temperature-dependent elongation of the H H bond in dihydrogen complexes of Ru(II) bearing an NHC ligand: Effect of the NHC and trans ligands. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.08.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Kirchon A, Feng L, Drake HF, Joseph EA, Zhou HC. From fundamentals to applications: a toolbox for robust and multifunctional MOF materials. Chem Soc Rev 2018; 47:8611-8638. [PMID: 30234863 DOI: 10.1039/c8cs00688a] [Citation(s) in RCA: 672] [Impact Index Per Article: 112.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In recent years, metal-organic frameworks (MOFs) have been regarded as one of the most important classes of materials. The combination of various metal clusters and ligands, arranged in a vast array of geometries has led to an ever-expanding MOF family. Each year, new and novel MOF structures are discovered. The structural diversity present in MOFs has significantly expanded the application of these new materials. MOFs show great potential for a variety of applications, including but not limited to: gas storage and separation, catalysis, biomedicine delivery, and chemical sensing. This review intends to offer a short summary of some of the most important topics and recent development in MOFs. The scope of this review shall cover the fundamental aspects concerning the design and synthesis of MOFs and range to the practical applications regarding their stability and derivative structures. Emerging trends of MOF development will also be discussed. These trends shall include multicomponent MOFs, defect development in MOFs, and MOF composites. The ever important structure-property-application relationship for MOFs will also be investigated. Overall, this review provides insight into both existing structures and emerging aspects of MOFs.
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Affiliation(s)
- Angelo Kirchon
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA.
| | - Liang Feng
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA.
| | - Hannah F Drake
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA.
| | - Elizabeth A Joseph
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA.
| | - Hong-Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA. and Department of Material Science and Engineering, Texas A&M University, College Station, Texas 77843-3003, USA
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7
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Johnson SI, Nielsen RJ, Goddard WA. Selectivity for HCO2– over H2 in the Electrochemical Catalytic Reduction of CO2 by (POCOP)IrH2. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01755] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Samantha I. Johnson
- Joint Center for Artificial
Photosynthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - Robert J. Nielsen
- Joint Center for Artificial
Photosynthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - William A. Goddard
- Joint Center for Artificial
Photosynthesis, California Institute of Technology, Pasadena, California 91125, United States
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8
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Polukeev AV, Marcos R, Ahlquist MSG, Wendt OF. Iridium Hydride Complexes with Cyclohexyl-Based Pincer Ligands: Fluxionality and Deuterium Exchange. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00324] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexey V. Polukeev
- Centre
for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Rocío Marcos
- School
of Biotechnology, KTH Royal Institute of Technology, Stockholm SE-106 91, Sweden
| | - Mårten S. G. Ahlquist
- School
of Biotechnology, KTH Royal Institute of Technology, Stockholm SE-106 91, Sweden
| | - Ola F. Wendt
- Centre
for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 22100 Lund, Sweden
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9
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Affiliation(s)
- Robert H. Crabtree
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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10
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Polukeev AV, Marcos R, Ahlquist MSG, Wendt OF. Solvent-Dependent Structure of Iridium Dihydride Complexes: Different Geometries at Low and High Dielectricity of the Medium. Chemistry 2016; 22:4078-86. [DOI: 10.1002/chem.201505133] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Alexey V. Polukeev
- Centre for Analysis and Synthesis; Department of Chemistry; Lund University, PO Box 124; 22100 Lund Sweden
| | - Rocío Marcos
- Division of Theoretical Chemistry and Biology; School of Biotechnology; KTH Royal Institute of Technology; 106 91 Stockholm Sweden
| | - Mårten S. G. Ahlquist
- Division of Theoretical Chemistry and Biology; School of Biotechnology; KTH Royal Institute of Technology; 106 91 Stockholm Sweden
| | - Ola F. Wendt
- Centre for Analysis and Synthesis; Department of Chemistry; Lund University, PO Box 124; 22100 Lund Sweden
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11
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Han D, Joksch M, Klahn M, Spannenberg A, Drexler HJ, Baumann W, Jiao H, Knitsch R, Hansen MR, Eckert H, Beweries T. Iridium(iii) hydrido complexes for the catalytic dehydrogenation of hydrazine borane. Dalton Trans 2016; 45:17697-17704. [DOI: 10.1039/c6dt03068h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of POCOP iridium hydride complexes with differently substituted aryl backbones catalyse the selective release of one equivalent of hydrogen from hydrazine borane.
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Affiliation(s)
- D. Han
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - M. Joksch
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - M. Klahn
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - A. Spannenberg
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - H.-J. Drexler
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - W. Baumann
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - H. Jiao
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - R. Knitsch
- Westfälische Wilhelms-Universität Münster
- Institut für Physikalische Chemie
- 48149 Münster
- Germany
| | - M. R. Hansen
- Westfälische Wilhelms-Universität Münster
- Institut für Physikalische Chemie
- 48149 Münster
- Germany
| | - H. Eckert
- Westfälische Wilhelms-Universität Münster
- Institut für Physikalische Chemie
- 48149 Münster
- Germany
- Institute of Physics Sao Carlos
| | - T. Beweries
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
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12
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Connelly SJ, Chanez AG, Kaminsky W, Heinekey DM. Characterization of a Palladium Dihydrogen Complex. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Connelly SJ, Chanez AG, Kaminsky W, Heinekey DM. Characterization of a palladium dihydrogen complex. Angew Chem Int Ed Engl 2015; 54:5915-8. [PMID: 25783481 DOI: 10.1002/anie.201412076] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/24/2015] [Indexed: 11/11/2022]
Abstract
The preparation and isolation of the first palladium dihydrogen complex is described. NMR spectroscopy reveals a very short H-H bond length, but the hydrogen molecule is activated toward heterolytic cleavage. An X-ray crystal structure suggests that proton transfer to the (tBu) PCP (κ(3)-2,6-((t)Bu2PCH2)2C6H3) pincer ligand is possible. The basicity of the ipso-carbon atom of the pincer ligand was investigated in a related complex.
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Affiliation(s)
- Samantha J Connelly
- Department of Chemistry, University of Washington, Box 351700, Seattle WA 98195 (USA)
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14
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Cheng C, Kim BG, Guironnet D, Brookhart M, Guan C, Wang DY, Krogh-Jespersen K, Goldman AS. Synthesis and characterization of carbazolide-based iridium PNP pincer complexes. Mechanistic and computational investigation of alkene hydrogenation: evidence for an Ir(III)/Ir(V)/Ir(III) catalytic cycle. J Am Chem Soc 2014; 136:6672-83. [PMID: 24746026 DOI: 10.1021/ja501572g] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New carbazolide-based iridium pincer complexes ((carb)PNP)Ir(C2H4), 3a, and ((carb)PNP)Ir(H)2, 3b, have been prepared and characterized. The dihydride, 3b, reacts with ethylene to yield the cis-dihydride ethylene complex cis-((carb)PNP)Ir(C2H4)(H)2. Under ethylene this complex reacts slowly at 70 °C to yield ethane and the ethylene complex, 3a. Kinetic analysis establishes that the reaction rate is dependent on ethylene concentration and labeling studies show reversible migratory insertion to form an ethyl hydride complex prior to formation of 3a. Exposure of cis-((carb)PNP)Ir(C2H4)(H)2 to hydrogen results in very rapid formation of ethane and dihydride, 3b. DFT analysis suggests that ethane elimination from the ethyl hydride complex is assisted by ethylene through formation of ((carb)PNP)Ir(H)(Et)(C2H4) and by H2 through formation of ((carb)PNP)Ir(H)(Et)(H2). Elimination of ethane from Ir(III) complex ((carb)PNP)Ir(H)(Et)(H2) is calculated to proceed through an Ir(V) complex ((carb)PNP)Ir(H)3(Et) which reductively eliminates ethane with a very low barrier to return to the Ir(III) dihydride, 3b. Under catalytic hydrogenation conditions (C2H4/H2), cis-((carb)PNP)Ir(C2H4)(H)2 is the catalyst resting state, and the catalysis proceeds via an Ir(III)/Ir(V)/Ir(III) cycle. This is in sharp contrast to isoelectronic (PCP)Ir systems in which hydrogenation proceeds through an Ir(III)/Ir(I)/Ir(III) cycle. The basis for this remarkable difference is discussed.
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Affiliation(s)
- Chen Cheng
- Department of Chemistry, The University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
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15
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16
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Shi Y, Suguri T, Dohi C, Yamada H, Kojima S, Yamamoto Y. Highly Active Catalysts for the Transfer Dehydrogenation of Alkanes: Synthesis and Application of Novel 7-6-7 Ring-Based Pincer Iridium Complexes. Chemistry 2013; 19:10672-89. [DOI: 10.1002/chem.201203108] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 04/18/2013] [Indexed: 11/11/2022]
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17
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Polukeev AV, Petrovskii PV, Peregudov AS, Ezernitskaya MG, Koridze AA. Dehydrogenation of Alcohols by Bis(phosphinite) Benzene Based and Bis(phosphine) Ruthenocene Based Iridium Pincer Complexes. Organometallics 2013. [DOI: 10.1021/om300921q] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Alexey V. Polukeev
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, 28 Vavilov
Street, 119991 Moscow, Russian Federation
| | - Pavel V. Petrovskii
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, 28 Vavilov
Street, 119991 Moscow, Russian Federation
| | - Alexander S. Peregudov
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, 28 Vavilov
Street, 119991 Moscow, Russian Federation
| | - Mariam G. Ezernitskaya
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, 28 Vavilov
Street, 119991 Moscow, Russian Federation
| | - Avthandil A. Koridze
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, 28 Vavilov
Street, 119991 Moscow, Russian Federation
- Institute of Organometallic
Chemistry, I. Javakhishvili Tbilisi State University, 3 Chavchavadze
Avenue, 0128 Tbilisi, Georgia
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18
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Devarajan D, Ess DH. Metal-Mediated Dihydrogen Activation. What Determines the Transition-State Geometry? Inorg Chem 2012; 51:6367-75. [DOI: 10.1021/ic3006426] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Deepa Devarajan
- Department of Chemistry
and Biochemistry, Brigham Young University, Provo, Utah
84602, United States
| | - Daniel H. Ess
- Department of Chemistry
and Biochemistry, Brigham Young University, Provo, Utah
84602, United States
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19
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Findlater M, Schultz KM, Bernskoetter WH, Cartwright-Sykes A, Heinekey DM, Brookhart M. Dihydrogen complexes of iridium and rhodium. Inorg Chem 2012; 51:4672-8. [PMID: 22364621 DOI: 10.1021/ic202630x] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of iridium and rhodium pincer complexes have been synthesized and characterized: [(POCOP)Ir(H)(H(2))] [BAr(f)(4)] (1-H(3)), (POCOP)Rh(H(2)) (2-H(2)), [(PONOP)Ir(C(2)H(4))] [BAr(f)(4)] (3-C(2)H(4)), [(PONOP)Ir(H)(2))] [BAr(f)(4)] (3-H(2)), [(PONOP)Rh(C(2)H(4))] [BAr(f)(4)] (4-C(2)H(4)) and [(PONOP)Rh(H(2))] [BAr(f)(4)] (4-H(2)) (POCOP = κ(3)-C(6)H(3)-2,6-[OP(tBu)(2)](2); PONOP = 2,6-(tBu(2)PO)(2)C(5)H(3)N; BAr(f)(4) = tetrakis(3,5-trifluoromethylphenyl)borate). The nature of the dihydrogen-metal interaction was probed using NMR spectroscopic studies. Complexes 1-H(3), 2-H(2), and 4-H(2) retain the H-H bond and are classified as η(2)-dihydrogen adducts. In contrast, complex 3-H(2) is best described as a classical dihydride system. The presence of bound dihydrogen was determined using both T(1) and (1)J(HD) coupling values: T(1) = 14 ms, (1)J(HD) = 33 Hz for the dihydrogen ligand in 1-H(3), T(1)(min) = 23 ms, (1)J(HD) = 32 Hz for 2-H(2), T(1)(min) = 873 ms for 3-H(2), T(1)(min) = 33 ms, (1)J(HD) = 30.1 Hz for 4-H(2).
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Affiliation(s)
- Michael Findlater
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA
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20
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Wang MF, Hong XJ, Zhan QG, Jin HG, Liu YT, Zheng ZP, Xu SH, Cai YP. Temperature-/solvent-dependent low-dimensional compounds based on quinoline-2,3-dicarboxylic acid: Structures and fluorescent properties. Dalton Trans 2012; 41:11898-906. [DOI: 10.1039/c2dt31243c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Chaplin AB, Green JC, Weller AS. C-C activation in the solid state in an organometallic σ-complex. J Am Chem Soc 2011; 133:13162-8. [PMID: 21736363 DOI: 10.1021/ja2047599] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Herein is reported the synthesis, by a solid-state reaction from [Ir(NBD)(2)(P(i)Pr(3))][BAr(F)(4)], of the first example of a C-C σ-complex with iridium, [Ir(BINOR-S)(P(i)Pr(3))][BAr(F)(4)]. This compound is unique in that in the solid state it undergoes reversible activation of the C-C single bond that interacts with the metal center, establishing a temperature-dependent equilibrium between Ir(III) C-C σ/Ir(V) bis-alkyl complexes. This process has been interrogated by variable-temperature X-ray diffraction, NMR spectroscopy, and DFT calculations.
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Affiliation(s)
- Adrian B Chaplin
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, UK
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22
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Zuo W, Braunstein P. N-Heterocyclic Dicarbene Iridium(III) Pincer Complexes Featuring Mixed NHC/Abnormal NHC Ligands and Their Applications in the Transfer Dehydrogenation of Cyclooctane. Organometallics 2011. [DOI: 10.1021/om200444q] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Weiwei Zuo
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, F-67081 Strasbourg Cedex, France
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, F-67081 Strasbourg Cedex, France
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23
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Schultz KM, Goldberg KI, Gusev DG, Heinekey DM. Synthesis, Structure, and Reactivity of Iridium NHC Pincer Complexes. Organometallics 2011. [DOI: 10.1021/om101024x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katherine M. Schultz
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Karen I. Goldberg
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Dmitry G. Gusev
- Department of Chemistry, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5, Canada
| | - D. Michael Heinekey
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
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24
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Pfirrmann S, Limberg C, Herwig C, Knispel C, Braun B, Bill E, Stösser R. A reduced β-diketiminato-ligated Ni3H4 unit catalyzing H/D exchange. J Am Chem Soc 2011; 132:13684-91. [PMID: 20828129 DOI: 10.1021/ja106266v] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An investigation concerning the stepwise reduction of the β-diketiminato nickel(II) hydride dimer [LNi(μ-H)(2)NiL], 1 (L = [HC(CMeNC(6)H(3)(iPr)(2))(2)](-)), has been carried out. While the reaction with one equivalent of potassium graphite, KC(8), led to the mixed valent Ni(I)/Ni(II) complex K[LNi(μ-H)(2)NiL], 3, treatment of 1 with two equivalents of KC(8) surprisingly yielded in the trinuclear complex K(2)[LNi(μ-H)(2)Ni(μ-H)(2)NiL], 4, in good yields. The Ni(3)H(4) core contains one Ni(II) and two Ni(I) centers, which are antiferromagnetically coupled so that a singlet ground state results. 4 represents the first structurally characterized molecular compound with three nickel atoms bridged by hydride ligands, and it shows a very interesting chemical behavior: Single-electron oxidation yields in the Ni(II)(2)Ni(I) compound K[LNi(μ-H)(2)Ni(μ-H)(2)NiL], 5, and treatment with CO leads to the elimination of H(2) with formation of the carbonyl complex K(2)[LNi(CO)](2), 6. Beyond that, it could be shown that 4 undergoes H/D exchange with deuterated solvents and the deuteride-compound 4-D(4) reacts with H(2) to give back 4. The crystal structures of the novel compounds 3-6 have been determined, and their electronic structures have been investigated by EPR and NMR spectroscopy, magnetic measurements, and DFT calculations.
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Affiliation(s)
- Stefan Pfirrmann
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
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Hebden TJ, St John AJ, Gusev DG, Kaminsky W, Goldberg KI, Heinekey DM. Preparation of a dihydrogen complex of cobalt. Angew Chem Int Ed Engl 2010; 50:1873-6. [PMID: 21328660 DOI: 10.1002/anie.201005281] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Indexed: 11/12/2022]
Affiliation(s)
- Travis J Hebden
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195, USA
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Hebden TJ, St. John AJ, Gusev DG, Kaminsky W, Goldberg KI, Heinekey DM. Preparation of a Dihydrogen Complex of Cobalt. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201005281] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Brayton DF, Goldberg KI, Kaminsky W, Heinekey DM. A Convenient One-Pot Synthesis of Di-t-butylphosphinic Chloride. PHOSPHORUS SULFUR 2008. [DOI: 10.1080/10426500801967781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Daniel F. Brayton
- a Department of Chemistry , University of Washington , Seattle, Washington, USA
| | - Karen I. Goldberg
- a Department of Chemistry , University of Washington , Seattle, Washington, USA
| | - Werner Kaminsky
- a Department of Chemistry , University of Washington , Seattle, Washington, USA
| | - D. Michael Heinekey
- a Department of Chemistry , University of Washington , Seattle, Washington, USA
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Bernskoetter WH, Brookhart M. Kinetics and Mechanism of Iridium-Catalyzed Dehydrogenation of Primary Amines to Nitriles. Organometallics 2008. [DOI: 10.1021/om701148t] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wesley H. Bernskoetter
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - Maurice Brookhart
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
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Paul A, Musgrave CB. Catalyzed Dehydrogenation of Ammonia–Borane by Iridium Dihydrogen Pincer Complex Differs from Ethane Dehydrogenation. Angew Chem Int Ed Engl 2007; 46:8153-6. [PMID: 17886331 DOI: 10.1002/anie.200702886] [Citation(s) in RCA: 186] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ankan Paul
- Department of Chemical Engineering, Keck Science Building, Stanford University, Stanford, CA-94305, USA.
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Paul A, Musgrave C. Catalyzed Dehydrogenation of Ammonia–Borane by Iridium Dihydrogen Pincer Complex Differs from Ethane Dehydrogenation. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702886] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kubas GJ. Fundamentals of H2 Binding and Reactivity on Transition Metals Underlying Hydrogenase Function and H2 Production and Storage. Chem Rev 2007; 107:4152-205. [DOI: 10.1021/cr050197j] [Citation(s) in RCA: 796] [Impact Index Per Article: 46.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Gregory J. Kubas
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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