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Hunter NH, Thomas CM. Polarized metal-metal multiple bonding and reactivity of phosphinoamide-bridged heterobimetallic group IV/cobalt compounds. Dalton Trans 2024; 53:15764-15781. [PMID: 39224084 DOI: 10.1039/d4dt02064b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Heterobimetallic complexes are studied for their ability to mimic biological systems as well as active sites in heterogeneous catalysts. While specific interest in early/late heterobimetallic systems has fluctuated, they serve as important models to fundamentally understand metal-metal bonding. Specifically, the polarized metal-metal multiple bonds formed in highly reduced early/late heterobimetallic complexes exemplify how each metal modulates the electronic environment and reactivity of the complex as a whole. In this Perspective, we chronicle the development of phosphinoamide-supported group IV/cobalt heterobimetallic complexes. This combination of metals allows access to a low valent Co-I center, which performs a rich variety of bond activation reactions when coupled with the pendent Lewis acidic metal center. Conversely, the low valent late transition metal is also observed to act as an electron reservoir, allowing for redox processes to occur at the d0 group IV metal site. Most of the bond activation reactions carried out by phosphinoamide-bridged M/Co-I (M = Ti, Zr, Hf) complexes are facilitated by cleavage of metal-metal multiple bonds, which serve as readily accessible electron reservoirs. Comparative studies in which both the number of buttressing ligands as well as the identity of the early metal were varied to give a library of heterobimetallic complexes are summarized, providing a thorough understanding of the reactivity of M/Co-I heterobimetallic systems.
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Affiliation(s)
- Nathanael H Hunter
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W, 18th Ave, Columbus, OH 43210, USA.
| | - Christine M Thomas
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W, 18th Ave, Columbus, OH 43210, USA.
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2
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Xin X, Sheng W, Zhang Q, Qi R, Zhu Q, Zhu C. Synthesis and characterization of homometallic cobalt complexes with metal-metal interactions. Dalton Trans 2024; 53:15696-15702. [PMID: 39248639 DOI: 10.1039/d4dt01301h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/10/2024]
Abstract
Complexes featuring metal-metal bonds play crucial roles in catalysis and small molecule activation due to the synergistic effects between the metals. Here, we report a series of homometallic cobalt complexes with metal-metal interactions that have been successfully stabilized by a multidentate ligand platform. Theoretical studies on metal-metal interactions in these cobalt complexes are discussed.
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Affiliation(s)
- Xiaoqing Xin
- School of Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Weiming Sheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Qian Zhang
- College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Ruogu Qi
- School of Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Qin Zhu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), SICAM, Nanjing University of Posts & Telecommunications, Nanjing 210023, China
| | - Congqing Zhu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
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3
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Charles RM, Brewster TP. H 2 and carbon-heteroatom bond activation mediated by polarized heterobimetallic complexes. Coord Chem Rev 2021; 433:213765. [PMID: 35418712 PMCID: PMC9004596 DOI: 10.1016/j.ccr.2020.213765] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The field of heterobimetallic chemistry has rapidly expanded over the last decade. In addition to their interesting structural features, heterobimetallic structures have been found to facilitate a range of stoichiometric bond activations and catalytic processes. The accompanying review summarizes advances in this area since January of 2010. The review encompasses well-characterized heterobimetallic complexes, with a particular focus on mechanistic details surrounding their reactivity applications.
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Affiliation(s)
- R Malcolm Charles
- Department of Chemistry, The University of Memphis, 3744 Walker Ave., Smith Chemistry Building, Memphis, TN 38152, United States
| | - Timothy P Brewster
- Department of Chemistry, The University of Memphis, 3744 Walker Ave., Smith Chemistry Building, Memphis, TN 38152, United States
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4
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Chatterjee B, Chang WC, Jena S, Werlé C. Implementation of Cooperative Designs in Polarized Transition Metal Systems—Significance for Bond Activation and Catalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03794] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Basujit Chatterjee
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34−36, 45470 Mülheim an der Ruhr, Germany
- Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
| | - Wei-Chieh Chang
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34−36, 45470 Mülheim an der Ruhr, Germany
- Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
| | - Soumyashree Jena
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34−36, 45470 Mülheim an der Ruhr, Germany
- Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
| | - Christophe Werlé
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34−36, 45470 Mülheim an der Ruhr, Germany
- Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
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Abstract
Significant progress has been made in the past 10-15 years on the design, synthesis, and properties of multimetallic coordination complexes with heterometallic metal-metal bonds that are paramagnetic. Several general classes have been explored including heterobimetallic compounds, heterotrimetallic compounds of either linear or triangular geometry, discrete molecular compounds containing a linear array of more than three metal atoms, and coordination polymers with a heterometallic metal-metal bonded backbone. We focus in this Review on the synthetic methods employed to access these compounds, their structural features, magnetic properties, and electronic structure. Regarding the metal-metal bond distances, we make use of the formal shortness ratio (FSR) for comparison of bond distances between a broad range of metal atoms of different sizes. The magnetic properties of these compounds can be described using an extension of the Goodenough-Kanamori rules to cases where two magnetic ions interact via a third metal atom. In describing the electronic structure, we focus on the ability (or not) of electrons to be delocalized across heterometallic bonds, allowing for rationalizations and predictions of single-molecule conductance measurements in paramagnetic heterometallic molecular wires.
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Affiliation(s)
- Jill A Chipman
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States
| | - John F Berry
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States
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Hatanaka T, Kusunose H, Kawaguchi H, Funahashi Y. Dinitrogen Activation by a Heterometallic VFe Complex Derived from 1,1'‐Bis(arylamido)vanadocene. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tsubasa Hatanaka
- Department of Chemistry Graduate School of Science Osaka University 1–1 Machikaneyama 560–0043 Toyonaka Osaka Japan
| | - Hinano Kusunose
- Department of Chemistry Graduate School of Science Osaka University 1–1 Machikaneyama 560–0043 Toyonaka Osaka Japan
| | - Hiroyuki Kawaguchi
- Department of Chemistry Graduate School of Science Tokyo Institute of Technology 2–12–1 Ookayama, Meguro‐ku 152–8551 Tokyo Japan
| | - Yasuhiro Funahashi
- Department of Chemistry Graduate School of Science Osaka University 1–1 Machikaneyama 560–0043 Toyonaka Osaka Japan
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Gramigna KM, Dickie DA, Foxman BM, Thomas CM. Cooperative H2 Activation across a Metal–Metal Multiple Bond and Hydrogenation Reactions Catalyzed by a Zr/Co Heterobimetallic Complex. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04390] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Kathryn M. Gramigna
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| | - Diane A. Dickie
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| | - Christine M. Thomas
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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Coombs J, Perry D, Kwon DH, Thomas CM, Ess DH. Why Two Metals Are Better Than One for Heterodinuclear Cobalt–Zirconium-Catalyzed Kumada Coupling. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00449] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jimmy Coombs
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Dalton Perry
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Doo-Hyun Kwon
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Christine M. Thomas
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
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Gao Y, Li G, Deng L. Bis(dinitrogen)cobalt(−1) Complexes with NHC Ligation: Synthesis, Characterization, and Their Dinitrogen Functionalization Reactions Affording Side-on Bound Diazene Complexes. J Am Chem Soc 2018; 140:2239-2250. [DOI: 10.1021/jacs.7b11660] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yafei Gao
- State Key Laboratory of Organometallic
Chemistry, Center for Excellence in Molecular Synthesis, Shanghai
Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Guangyu Li
- State Key Laboratory of Organometallic
Chemistry, Center for Excellence in Molecular Synthesis, Shanghai
Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Liang Deng
- State Key Laboratory of Organometallic
Chemistry, Center for Excellence in Molecular Synthesis, Shanghai
Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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10
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Dunn PL, Carlson RK, Gagliardi L, Tonks IA. Structure and bonding of group 4-nickel heterobimetallics supported by 2-(diphenylphosphino)pyrrolide ligands. Dalton Trans 2018; 45:9892-901. [PMID: 26952589 DOI: 10.1039/c6dt00431h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a full series of group 4/nickel complexes supported by a 2-(diphenylphosphino)pyrrolide (NP) ligand is reported. Treatment of the homoleptic, 8-coordinate M(NP)4 monometallic precursors with Ni(COD)2 (COD = 1,5-cyclooctadiene) yielded the heterobimetallic complexes (κ(2)-NP)M(μ2-NP)3Ni (M = Ti, Zr, Hf). Although X-ray crystallographic analysis reveals similarly short metal-metal distances in all three complexes, quantum chemical calculations indicate that ZrNi () and HfNi () contain only single Ni → M dative bonds while TiNi () has an additional Ti-Ni π-bond. All three complexes have quasireversible reductions by cyclic voltammetry, and 1-electron chemical reduction of by Na(Hg) yields the anion, [Na][(κ(2)-NP)Ti(μ2-NP)3Ni] (). X-ray and computational analysis indicate that the 1-electron reduction of completely breaks the metal-metal bond, yielding a formally Ti(III)-Ni(0) complex. Ti-Ni bonding can also be disrupted by coordination of CO, wherein Ni → CO backbonding effectively outcompetes Ni → Ti dative bonding.
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Affiliation(s)
- Peter L Dunn
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA.
| | - Rebecca K Carlson
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA. and Supercomputing Institute and Chemical Theory Center, University of Minnesota, Minneapolis, MN 55455, USA
| | - Laura Gagliardi
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA. and Supercomputing Institute and Chemical Theory Center, University of Minnesota, Minneapolis, MN 55455, USA
| | - Ian A Tonks
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA.
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11
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12
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Synthesis and characterization of triply-bonded titanium-iron complexes supported by 2-(diphenylphosphino)pyrrolide ligands. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Laskar P, Yamamoto K, Srinivas A, Mifleur A, Nagae H, Tsurugi H, Mashima K. Tantallacyclopentadiene as a unique metal-containing diene ligand coordinated to nickel for preparing tantalum–nickel heterobimetallic complexes. Dalton Trans 2017; 46:13043-13054. [DOI: 10.1039/c7dt02481a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mononuclear tantallacyclopentadiene, TaCl3(C4H2tBu2), coordinates to Ni to form heterobimetallic complexes of Cl3Ta(μ-C4H2tBu2)Ni(L) (L = COD, phosphines, IPr).
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Affiliation(s)
- Payel Laskar
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Keishi Yamamoto
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Anga Srinivas
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Alexis Mifleur
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Haruki Nagae
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Hayato Tsurugi
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Kazushi Mashima
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
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14
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Yamamoto K, Higashida K, Nagae H, Tsurugi H, Mashima K. Synthesis and Characterization of Heterobimetallic Tantalum-Rhodium and Tantalum-Iridium Complexes Connected by a Tantalacyclopentadiene Fragment. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201600180] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Keishi Yamamoto
- Department of Chemistry; Graduate School of Engineering Science; Osaka University; Toyonaka Osaka 560-8531 Japan
| | - Kosuke Higashida
- Department of Chemistry; Graduate School of Engineering Science; Osaka University; Toyonaka Osaka 560-8531 Japan
| | - Haruki Nagae
- Department of Chemistry; Graduate School of Engineering Science; Osaka University; Toyonaka Osaka 560-8531 Japan
| | - Hayato Tsurugi
- Department of Chemistry; Graduate School of Engineering Science; Osaka University; Toyonaka Osaka 560-8531 Japan
| | - Kazushi Mashima
- Department of Chemistry; Graduate School of Engineering Science; Osaka University; Toyonaka Osaka 560-8531 Japan
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15
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Saper NI, Bezpalko MW, Foxman BM, Thomas CM. Synthesis of chiral heterobimetallic tris(phosphinoamide) Zr/Co complexes. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Krogman JP, Bezpalko MW, Foxman BM, Thomas CM. Multi-electron redox processes at a Zr(iv) center facilitated by an appended redox-active cobalt-containing metalloligand. Dalton Trans 2016; 45:11182-90. [DOI: 10.1039/c6dt01498d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of a reduced heterobimetallic Co−I/ZrIV complex with a series of azido and diazo reagents is explored to demonstrate the feasibility of facilitating two-electron redox processes at a formally d0 Zr(iv) center using the appended Co fragment exclusively as an electron-reservoir.
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Wu B, Gramigna KM, Bezpalko MW, Foxman BM, Thomas CM. Heterobimetallic Ti/Co Complexes That Promote Catalytic N–N Bond Cleavage. Inorg Chem 2015; 54:10909-17. [DOI: 10.1021/acs.inorgchem.5b01962] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bing Wu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Kathryn M. Gramigna
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Mark W. Bezpalko
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Christine M. Thomas
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
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18
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Krogman JP, Foxman BM, Thomas CM. Formation and Subsequent Reactivity of a N2-Stabilized Cobalt–Hydride Complex. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00182] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Jeremy P. Krogman
- Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham, Massachusetts 02454, United States
| | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham, Massachusetts 02454, United States
| | - Christine M. Thomas
- Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham, Massachusetts 02454, United States
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19
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Fang H, Jing H, Ge H, Brothers PJ, Fu X, Ye S. The Mechanism of E–H (E = N, O) Bond Activation by a Germanium Corrole Complex: A Combined Experimental and Computational Study. J Am Chem Soc 2015; 137:7122-7. [DOI: 10.1021/jacs.5b01121] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huayi Fang
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Huize Jing
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Haonan Ge
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Penelope J. Brothers
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1042, New Zealand
| | - Xuefeng Fu
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Shengfa Ye
- Max-Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, D-45470 Mülheim an der Ruhr, Germany
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Lee KH, Napoline J, Bezpalko MW, Foxman BM, Thomas CM. Probing substituent effects in phosphinoamine ligands using Mo(CO)5L complexes. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Wu B, Bezpalko MW, Foxman BM, Thomas CM. A heterobimetallic complex featuring a Ti-Co multiple bond and its application to the reductive coupling of ketones to alkenes. Chem Sci 2015; 6:2044-2049. [PMID: 29142672 PMCID: PMC5654242 DOI: 10.1039/c4sc03772c] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 01/18/2015] [Indexed: 12/12/2022] Open
Abstract
A Ti/Co heterobimetallic complex featuring a very short metal–metal triple bond has been synthesized. This complex promotes the reductive coupling reaction of aryl ketones into alkenes.
To explore metal–metal multiple bonds between first row transition metals, Ti/Co complexes supported by two phosphinoamide ligands have been synthesized and characterized. The Ti metalloligand Cl2Ti(XylNPiPr2)2 (1) was treated with CoI2 under reducing conditions, permitting isolation of the Ti/Co complex [(μ-Cl)Ti(XylNPiPr2)2CoI]2 (2). One electron reduction of complex 2 affords ClTi(XylNPiPr2)2CoPMe3 (3), which features a metal–metal triple bond and an unprecedentedly short Ti–Co distance of 2.0236(9) Å. This complex is shown to promote the McMurry coupling reaction of aryl ketones into alkenes, with concomitant formation of the tetranuclear complex [Ti(μ3-O)(NXylPiPr2)2CoI]2 (4). A cooperative mechanism involving bimetallic C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O bond activation and a cobalt carbene intermediate is proposed.
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Affiliation(s)
- Bing Wu
- Department of Chemistry , Brandeis University , 415 South Street MS 015 , Waltham , MA 02454 , USA .
| | - Mark W Bezpalko
- Department of Chemistry , Brandeis University , 415 South Street MS 015 , Waltham , MA 02454 , USA .
| | - Bruce M Foxman
- Department of Chemistry , Brandeis University , 415 South Street MS 015 , Waltham , MA 02454 , USA .
| | - Christine M Thomas
- Department of Chemistry , Brandeis University , 415 South Street MS 015 , Waltham , MA 02454 , USA .
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Kuppuswamy S, Cass T, Bezpalko MW, Foxman BM, Thomas CM. Synthesis and investigation of the metal–metal interactions in heterobimetallic Cr/Rh and Cr/Ir complexes. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.07.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Dunn PL, Reath AH, Clouston LJ, Young VG, Tonks IA. Homo- and heteroleptic group 4 2-(diphenylphosphino)pyrrolide complexes: Synthesis, coordination chemistry and solution state dynamics. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.06.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dolinar BS, Berry JF. Electronic tuning of Mo2(thioamidate)4 complexes through π-system substituents and cis/trans isomerism. Dalton Trans 2014; 43:6165-76. [PMID: 24590395 DOI: 10.1039/c4dt00297k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an exploration of the coordination chemistry of a systematic series of cyclic thioamidate ligands with the quadruply-bonded Mo2(4+) core. In addition to the S and N donor atoms that bind to Mo, the ligands utilized in this study have an additional O or S atom in conjugation with the thioamidate π system. The preparation of four new Mo2 complexes is described, and these compounds are characterized by X-ray crystallography, NMR and UV-vis spectroscopy, electrochemistry, and DFT calculations. These complexes provide a means to interrogate the electronics of Mo2(thioamidate)4 systems. Notably, we describe the first two examples of Mo2(thioamidate)4 complexes in their cis-2,2-regioisomer. By varying the π-system substituent and regioisomerism of these compounds, the electronics of the dimolybdenum core is shown to be altered with varying degrees of effect. Cyclic voltammetry results show that changing the π-system substituent from O to S results in an increase in the Mo2(4+/5+) oxidation potential by 170 mV. Changing the arrangement of ligands around the dimolybdenum core from trans-2,2 to cis-2,2 slightly weakens the metal-ligand bonds, raising the oxidation potential by a more modest 30-100 mV. MO diagrams of each compound derived from DFT calculations support these conclusions as well; the identity of the π-system substituent alters the δ-δ* (HOMO-LUMO) gap by up to 0.4 eV, whereas regioisomerism yields smaller changes in the electronic structure.
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Affiliation(s)
- Brian S Dolinar
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53704, USA.
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Bheemaraju A, Beattie JW, Danylyuk Y, Rochford J, Groysman S. Synthesis, Structures, and Reactivity of Copper(I) Complexes Supported by a Rigid Dinucleating Ligand. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402611] [Citation(s) in RCA: 13] [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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Wu B, Hernández Sánchez R, Bezpalko MW, Foxman BM, Thomas CM. Formation of heterobimetallic zirconium/cobalt diimido complexes via a four-electron transformation. Inorg Chem 2014; 53:10021-3. [PMID: 25203394 DOI: 10.1021/ic501490e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity of the reduced heterobimetallic complex Zr((i)PrNP(i)Pr2)3CoN2 (1) toward aryl azides was examined, revealing a four-electron redox transformation to afford unusual heterobimetallic zirconium/cobalt diimido complexes. In the case of p-tolyl azide, the diamagnetic C3-symmetric bis(terminal imido) complex 3 is formed, but mesityl azide instead leads to asymmetric complex 4 featuring a bridging imido fragment.
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Affiliation(s)
- Bing Wu
- Department of Chemistry, Brandeis University , 415 South Street, MS 015, Waltham, Massachusetts 02454, United States
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Krogman JP, Gallagher JR, Zhang G, Hock AS, Miller JT, Thomas CM. Assignment of the oxidation states of Zr and Co in a highly reactive heterobimetallic Zr/Co complex using X-ray absorption spectroscopy (XANES). Dalton Trans 2014; 43:13852-7. [DOI: 10.1039/c4dt01534g] [Citation(s) in RCA: 23] [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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Marquard SL, Bezpalko MW, Foxman BM, Thomas CM. Interaction and Activation of Carbon–Heteroatom π Bonds with a Zr/Co Heterobimetallic Complex. Organometallics 2014. [DOI: 10.1021/om500217a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Seth L. Marquard
- Department
of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Mark W. Bezpalko
- Department
of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Bruce M. Foxman
- Department
of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Christine M. Thomas
- Department
of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
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29
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Krogman JP, Thomas CM. Metal–metal multiple bonding in C3-symmetric bimetallic complexes of the first row transition metals. Chem Commun (Camb) 2014; 50:5115-27. [DOI: 10.1039/c3cc47537a] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Zhou W, Saper NI, Krogman JP, Foxman BM, Thomas CM. Effect of ligand modification on the reactivity of phosphinoamide-bridged heterobimetallic Zr/Co complexes. Dalton Trans 2014; 43:1984-9. [DOI: 10.1039/c3dt52133h] [Citation(s) in RCA: 23] [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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31
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Napoline JW, Kraft SJ, Matson EM, Fanwick PE, Bart SC, Thomas CM. Tris(phosphinoamide)-supported uranium-cobalt heterobimetallic complexes featuring Co → U dative interactions. Inorg Chem 2013; 52:12170-7. [PMID: 24111545 DOI: 10.1021/ic402343q] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A series of tris- and tetrakis(phosphinoamide) U/Co complexes has been synthesized. The uranium precursors, (η(2)-Ph2PN(i)Pr)4U (1), (η(2)-(i)Pr2PNMes)4U (2), (η(2)-Ph2PN(i)Pr)3UCl (3), and (η(2)-(i)Pr2PNMes)3UI (4), were easily accessed via addition of the appropriate stoichiometric equivalents of [Ph2PN(i)Pr]K or [(i)Pr2PNMes]K to UCl4 or UI4(dioxane)2. Although the phosphinoamide ligands in 1 and 4 have been shown to coordinate to U in an η(2)-fashion in the solid state, the phosphines are sufficiently labile in solution to coordinate cobalt upon addition of CoI2, generating the heterobimetallic Co/U complexes ICo(Ph2PN(i)Pr)3U[η(2)-Ph2PN(i)Pr] (5), ICo((i)Pr2PNMes)3U[η(2)-((i)Pr2PNMes)] (6), ICo(Ph2PN(i)Pr)3UI (7), and ICo((i)Pr2PNMes)3UI (8). Structural characterization of complexes 5 and 7 reveals reasonably short Co-U interatomic distances, with 7 exhibiting the shortest transition metal-uranium distance ever reported (2.874(3) Å). Complexes 7 and 8 were studied by cyclic voltammetry to examine the influence of the metal-metal interaction on the redox properties compared with both monometallic Co and heterobimetallic Co/Zr complexes. Theoretical studies are used to further elucidate the nature of the transition metal-actinide interaction.
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Affiliation(s)
- J Wesley Napoline
- Department of Chemistry, Brandeis University , 415 South Street, Waltham, Massachusetts 02454, United States
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32
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Napoline JW, Krogman JP, Shi R, Kuppuswamy S, Bezpalko MW, Foxman BM, Thomas CM. Activation of E-H and E-E (E = S, O) Bonds by Heterobimetallic Zr/Co Complexes: Evidence for Both One- and Two-Electron Processes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300122] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Krogman JP, Bezpalko MW, Foxman BM, Thomas CM. Synthesis, Structure, and Reactivity of an Anionic Zr–Oxo Relevant to CO2 Reduction by a Zr/Co Heterobimetallic Complex. Inorg Chem 2013; 52:3022-31. [DOI: 10.1021/ic302473j] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jeremy P. Krogman
- Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham,
Massachusetts 02454, United States
| | - Mark W. Bezpalko
- Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham,
Massachusetts 02454, United States
| | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham,
Massachusetts 02454, United States
| | - Christine M. Thomas
- Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham,
Massachusetts 02454, United States
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Tutusaus O, Ni C, Szymczak NK. A transition metal Lewis acid/base triad system for cooperative substrate binding. J Am Chem Soc 2013; 135:3403-6. [PMID: 23421523 DOI: 10.1021/ja400962h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A frustrated Lewis pair accessory functionality is positioned in the secondary coordination sphere of a terpyridine ligand (Tpy(BN) = 6-morpholino-2,2':6',2″-terpyridine-6″-boronic acid pinacol ester) to promote directed Lewis acid/base interactions. Following metalation with VCl3, the utility of the metal Lewis acid/base triad (LABT) is highlighted with N2H4 as a cooperatively coordinated substrate, affording the first η(2)-[N2H3](-) vanadium complex.
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Affiliation(s)
- Oscar Tutusaus
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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