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Chatelain L, Arrigoni F, Schollhammer P, Zampella G. C-Cl Bond Activation at Rotated vs Unrotated Dinuclear Site Related to [FeFe]-Hydrogenases. Inorg Chem 2023; 62:20913-20918. [PMID: 38047903 DOI: 10.1021/acs.inorgchem.3c03481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
The novel dinuclear complex related to the [FeFe]-hydrogenases active site, [Fe2(μ-pdt)(κ2-dmpe)2(CO)2] (1), is highly reactive toward chlorinated compounds CHxCl4-x (x = 1, 2) affording selectively terminal or bridging chloro diiron isomers through a C-Cl bond activation. DFT calculations suggest a cooperative mechanism involving a formal concerted regioselective chloronium transfer depending on the unrotated or rotated conformation of two isomers of 1.
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Affiliation(s)
- Lucile Chatelain
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, 6 Avenue Victor le Gorgeu, CS93837, Brest-Cedex 3, 29238 Brest, France
| | - Federica Arrigoni
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Philippe Schollhammer
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, 6 Avenue Victor le Gorgeu, CS93837, Brest-Cedex 3, 29238 Brest, France
| | - Giuseppe Zampella
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
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2
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Subramaniyan V, Tibika F, Tulchinsky Y. Effect of Internal Ligand Strain on Coordination Behavior of PSP Pincer Ligands. Inorg Chem 2023; 62:123-136. [PMID: 36544266 DOI: 10.1021/acs.inorgchem.2c03044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Chelating ligands and most specifically pincer ligands, with their characteristic co-planar binding, usually undergo deformations upon coordination, resulting in a significant ligand strain. Such an effect on the properties of the so formed complex has rarely been explored. This study is an attempt to analyze this strain and its contribution to the overall binding energy and coordination behavior of PSP pincer ligands. Hence, we designed a rigid thioxanthone-based PSP pincer ligand (I) and studied the difference in the coordination properties with the more flexible thioxanthene and thioether-based PSP pincer ligands (II and III). Although with one equivalent of Pd(II) precursor, the three ligands exhibited a similar coordination behavior leading to similar κ3-P,S,P pincer complexes, an in-depth computational analysis pointed out the different contributions of the internal strain energy in lowering the binding energy of these complexes. This effect was clearly reflected when we calculated the enthalpy change of these ligand-exchange reactions. As these exchange reactions are enthalpy-driven, these results could also be confirmed experimentally. With two equivalents of Pd(II), the three ligands diverged in their coordination behavior. Specifically, ligands I and III gave each a binuclear complex, with different coordination modes, whereas the pincer complex of ligand II remained unaffected by excess of Pd(II). Our calculations suggest that the driving force for the formation of binuclear Pd(II) complexes is the relief of the internal ligand strain. With Pt(II), only the mononuclear κ3-P,S,P pincer complexes were obtained irrespectively of the amount of the Pt(II) precursor. In these cases, we assume that kinetic inertness of the formed mononuclear pincer Pt(II) complexes prevents binding of an additional Pt(II) nucleus. This study points out the important role of the internal ligand strain in PSP pincer ligand coordination behavior. We believe that our findings can be extended to other pincer ligands systems as well.
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Affiliation(s)
| | - Françoise Tibika
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem9190401, Israel
| | - Yuri Tulchinsky
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem9190401, Israel
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3
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Longcake A, Lees MR, Senn MS, Chaplin AB. Oxidative Addition of C–Cl Bonds to a Rh(PONOP) Pincer Complex. Organometallics 2022; 41:3557-3567. [DOI: 10.1021/acs.organomet.2c00400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Alexandra Longcake
- Department of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
| | - Martin R. Lees
- Department of Physics, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
| | - Mark S. Senn
- Department of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
| | - Adrian B. Chaplin
- Department of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
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4
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Wititsuwannakul T, Hall MB, Gladysz JA. Mechanism of Coupling of Methylidene to Ethylene Ligands in Dimetallic Assemblies; Computational Investigation of a Model for a Key Step in Catalytic C 1 Chemistry. J Am Chem Soc 2022; 144:18672-18687. [PMID: 36174130 DOI: 10.1021/jacs.2c08886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Methylidene complexes often couple to ethylene complexes, but the mechanistic insight is scant. The path by which two cations [(η5-C5H5)Re(NO)(PPh3)(═CH2)]+ (5+) transform (CH2Cl2/acetonitrile) to [(η5-C5H5)Re(NO)(PPh3)(H2C═CH2)]+ (6+) and [(η5-C5H5)Re(NO)(PPh3)(NCCH3)]+ is studied by density functional theory. Experiments provide a number of constraints such as the second-order rate in 5+; no prior ligand dissociation/exchange; a faster reaction of (S)-5+ with (S)-5+ than with (R)-5+ ("enantiomer self-recognition"). Although dirhenium dications with Re(μ-CH2)2Re cores represent energy minima, they are not accessible by 2 + 2 cycloadditions of 5+. Transition states leading to ReCH2CH2Re linkages are prohibitively high in energy. However, 5+ can give non-covalent SRe/SRe or SRe/RRe dimers with π interactions between the PPh3 ligands but long ReCH2···H2CRe and H2CRe···H2CRe distances (3.073-3.095 Å and 3.878-4.529 Å, respectively). In rate-determining steps, these afford [(η5-C5H5)Re(NO)(PPh3)(μ-η2:η2-H2C···CH2)(Ph3P)(ON)Re(η5-C5H5)]2+ (132+), in which one rhenium binds the bridging ethylene more tightly than the other (2.115-2.098 vs 2.431-2.486 Å to the centroid). In the SRe/RRe adduct, Dewar-Chatt-Duncanson optimization leads to unfavorable PPh3/PPh3 contacts. Ligand interactions are further dissected in the preceding transition states via component analyses, and ΔΔG‡ (1.2 kcal/mol, CH2Cl2) favors the SRe/SRe pathway, in accordance with the experiment. Acetonitrile then displaces 6+ from the more weakly bound rhenium of 132+. The formation of similar μ-H2C···CH2 intermediates is found to be rate-determining for varied coordinatively saturated M═CH2 species [M = Fe(d6)/Re(d4)/Ta(d2)], establishing generality and enhancing relevancy to catalytic CH4 and CO/H2 chemistry.
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Affiliation(s)
- Taveechai Wititsuwannakul
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Michael B Hall
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - John A Gladysz
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
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5
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Abstract
Efforts to develop catalytic carbene transfer reactions have largely relied on the use of diazo precursors. However, diazoalkanes are susceptible to undergoing violent exothermic decomposition unless they contain stabilizing substituents. Consequently, most synthetic methods are restricted to diazoacetates or related derivatives. In this Perspective, we describe an alternative approach to carbene transfer catalysis based on the generation of metal carbenoids from gem-dihaloalkanes and gem-dihaloalkenes. These precursors are readily available and stable in unsubstituted form or with a variety of donor and acceptor substituents. Using this approach, it is possible to design cyclopropanation reactions with non-stabilized carbenes, such as methylene, isopropylidene, and vinylidene. Furthermore, due to the distinct mechanistic pathways of these reactions, novel modes of cycloaddition can be carried out, including [4 + 1]-cycloadditions.
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Affiliation(s)
- Christopher Uyeda
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
- Correspondence:
| | - Annah E. Kalb
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
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Bac S, Fieser ME, Mallikarjun Sharada S. A computational study of the mechanism of chloroalkane dechlorination with Rh(I) complexes. Phys Chem Chem Phys 2022; 24:3518-3522. [PMID: 35103731 DOI: 10.1039/d1cp03949k] [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
This work utilizes density functional theory and the energetic span model to determine steps constituting the catalytic cycle and turnover frequencies, respectively, for C(sp3)-Cl activation and dechlorination by model Rh(I) complexes containing POP-Pincer ligands with the aid of Na salts. The steps in the catalytic cycle with NaHCO2 as the hydrogen carrier are (i) rotation of the Rh-Cl bond out of the ligand plane, (ii) metal insertion into the C-Cl bond, (iii) formate binding and removal of one Cl as NaCl, (iv) formation and removal of CO2 from formate-bound Rh, and (v) hydrogenation of the alkyl bound to Rh to form an alkane, followed by Rh-Cl rotation to restore the catalyst resting state. We find that the the turnover-determining states and TOFs for monochloropropane (MCP) dechlorination depend strongly on the hydrogen carrier, with significantly higher TOF for NaH than NaHCO2. Therefore, NaH may be a promising salt for alkylchloride dechlorination with Rh(I) complexes.
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Affiliation(s)
- Selin Bac
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, USA.
| | - Megan E Fieser
- Department of Chemistry, University of Southern California, Los Angeles, CA, USA. .,Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA, USA
| | - Shaama Mallikarjun Sharada
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, USA. .,Department of Chemistry, University of Southern California, Los Angeles, CA, USA.
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Algarra AG, Galindo JCG, Puerta MC, Valerga P, Jiménez-Tenorio M. Activation of Dichloromethane by a Bis-NHC Cp*Ru Complex: Formation of a Pentamethyl(chloromethyl)cyclopentadiene Ligand. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrés G. Algarra
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cadiz, Spain
| | - Juan Carlos G. Galindo
- Departamento de Química Orgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cadiz, Spain
| | - M. Carmen Puerta
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cadiz, Spain
| | - Pedro Valerga
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cadiz, Spain
| | - Manuel Jiménez-Tenorio
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cadiz, Spain
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Wei N, Yang D, Zhao J, Mei T, Zhang Y, Wang B, Qu J. Structure and Methylene Transfer Reactivity of Thiolate-Bridged Dichromium Methylene Complexes Derived from Dihalomethane via Cleavage of Two Carbon–Halogen Bonds. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Nianmin Wei
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Dawei Yang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Jinfeng Zhao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Tao Mei
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Yixin Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
- State Key Laboratory of Bioreactor Engineering, Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
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