1
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Gong C, Huang J, Cai L, Yuan Y, Pu T, Huang M, Wu SH, Wang L. Visible-Light-Promoted Thiolation of Benzyl Chlorides with Thiosulfonates via a Photoactive Electron Donor-Acceptor Complex. J Org Chem 2024; 89:9450-9461. [PMID: 38867507 DOI: 10.1021/acs.joc.4c00748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
Visible-light-promoted thiolation of benzyl chlorides with thiosulfonates is disclosed via an electron donor-acceptor complex strategy. In addition to efficiently delivering a series of arylbenzylsulfide compounds, versatile thioglycosides were also successfully constructed by applying the metal- and photocatalyst-free protocol. Preliminary mechanistic studies suggest that a radical-radical coupling process was involved in this transformation.
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Affiliation(s)
- Chao Gong
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Jialun Huang
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Liuyan Cai
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Yilong Yuan
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Tonglv Pu
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Mingjie Huang
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Si-Hai Wu
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Lianhui Wang
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
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2
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Ghosh M, Parvin N, Panwaria P, Tothadi S, Bakthavatsalam R, Therambram A, Khan S. Diverse structural reactivity patterns of a POCOP ligand with coinage metals. Dalton Trans 2024; 53:7763-7774. [PMID: 38619861 DOI: 10.1039/d3dt03921h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
We have utilised the 4,6-di-tert-butyl resorcinol bis(diphenylphosphinite) (POCOP) ligand for exploring its coordination ability towards group 11 metal centres. The treatment of the bidentate ligand 1 with various coinage metal precursors afforded a wide range of structurally diverse complexes 2-12, depending upon the metal precursors used. This furnishes several multinuclear Cu(I) complexes with dimeric (2) and tetrameric cores (3, 4, and 5). The tetrameric stairstep complex 4 shows thermochromic behaviour, whereas the dimeric complex 2 and tetrameric complex 3 show luminescence properties at cryogenic temperatures. Interestingly, the halide substitution reaction of the dimeric complex 2 with KPPh2 produces a unique mixed phosphine-based tetrameric Cu(I) complex, 5. Treatment of the POCOP ligand with [CuBF4(CH3CN)4] in the presence of 2,2'-bipyridine afforded heteroleptic complex 6, consisting of tri- and tetra-coordinated cationic Cu(I) centres. Furthermore, we could also isolate cubane (8) and stairstep (9) complexes of Ag(I). The cationic Au(I) complex (12) was obtained from the dinuclear Au(I) complex of POCOP, 11. Complex 12 revealed the presence of a strong intramolecular aurophilic interaction with an Au⋯Au bond distance of 3.1143(9) Å. Subsequently, the photophysical properties of these complexes have been studied. All the complexes were characterised by single-crystal X-ray diffraction studies, routine NMR techniques, and mass spectroscopy.
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Affiliation(s)
- Moushakhi Ghosh
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Nasrina Parvin
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Prakash Panwaria
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Srinu Tothadi
- CSIR-Central Salt and Marine Chemicals Research Institute, Gijub Badheka Marg, Bhavnagar 364002, India
| | - Rangarajan Bakthavatsalam
- Department of Chemistry, Indian Institute of Science Education and Research Tirupati, Srinivasapuram-Jangalapalli Village, Tirupati 517619, India
| | - Arshad Therambram
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Shabana Khan
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
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3
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Mao JX, Chang J, Zhang J, Chen X. Structures of nickel chloride and thiolate complexes supported by PCN and POCOP pincer ligands and catalytic reactivity of the chloride complexes. Dalton Trans 2023; 52:17485-17492. [PMID: 37955433 DOI: 10.1039/d3dt03109h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Nickel chloride and thiolate complexes supported by benzene-pyridine-based nonsymmetrical PCN pincer ligands, [2-(tBu2PO)-6-(2-pyrindinyl-4-R)-C6H3]NiX (R = H, CH3, CF3; X = Cl, SH, SPh), were synthesized and fully characterized. The structures of these complexes and the catalytic reactivity of the chloride complexes were investigated along with the related POCOP counterparts [2,6-(tBu2PO)2C6H3]NiX (X = Cl, SH). It was found that the composition and substitution of the pincer backbone evidently influence the structures and catalytic reactivity. The Ni-P and Ni-Cipso bond lengths in the PCN complexes are significantly shorter than those in the POCOP complex. The Ni-Cl and Ni-S bond lengths in the PCN complexes are longer than those in the POCOP complexes. An electron rich pyrindinyl ring in the PCN complexes makes the Ni-Cl bond longer. The Ni-N bond length is more sensitive to the auxiliary ligand compared with the Ni-P bond length in the PCN complexes. The PCN chloride complexes were found to be active catalysts for selective hydration of nitriles to primary amides in the presence of NaOH at 80 °C and the catalytic activity increases with the increase of electron richness of the pyridinyl ring. However, the corresponding POCOP counterpart is inactive under the same conditions.
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Affiliation(s)
- Jia-Xue Mao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Jiarui Chang
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Jie Zhang
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
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4
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Zhao X, Li M, Sun K, Xu Z, Tian L, Wang Y. Electrochemical deoxygenative homo-couplings of aromatic aldehydes. Chem Commun (Camb) 2023; 59:13062-13065. [PMID: 37849338 DOI: 10.1039/d3cc03346e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
An electrochemical deoxygenative homo-coupling of aromatic aldehydes is achieved to selectively access bibenzyl and stilbene derivatives. The protocol allows the homo-coupling of aldehydes to occur after single-electron-reduction at the cathode. Taking advantage of the oxophilicity of triphenylphosphine, the electrochemical deoxygenation proceeds smoothly to give reductive homo-coupling products.
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Affiliation(s)
- Xiaoqian Zhao
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Meng Li
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Kunhui Sun
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Zhimin Xu
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Lifang Tian
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Yahui Wang
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
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5
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Yang Q, Li X, Chen L, Han X, Wang FR, Tang J. Effective Activation of Strong C-Cl Bonds for Highly Selective Photosynthesis of Bibenzyl via Homo-Coupling. Angew Chem Int Ed Engl 2023; 62:e202307907. [PMID: 37515455 PMCID: PMC10952150 DOI: 10.1002/anie.202307907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/08/2023] [Accepted: 07/26/2023] [Indexed: 07/30/2023]
Abstract
Carbon-carbon (C-C) coupling of organic halides has been successfully achieved in homogeneous catalysis, while the limitation, e.g., the dependence on rare noble metals, complexity of the metal-ligand catalylst and the poor catalyst stability and recyclability, needs to be tackled for a green process. The past few years have witnessed heterogeneous photocatalysis as a green and novel method for organic synthesis processes. However, the study on C-C coupling of chloride substrates is rare due to the extremely high bond energy of C-Cl bond (327 kJ mol-1 ). Here, we report a robust heterogeneous photocatalyst (Cu/ZnO) to drive the homo-coupling of benzyl chloride with high efficiency, which achieves an unprecedented high selectivity of bibenzyl (93 %) and yield rate of 92 % at room temperature. Moreover, this photocatalytic process has been validated for C-C coupling of 10 benzylic chlorides all with high yields. In addition, the excellent stability has been observed for 8 cycles of reactions. With detailed characterization and DFT calculation, the high selectivity is attributed to the enhanced adsorption of reactants, stabilization of intermediates (benzyl radicals) for the selective coupling by the Cu loading and the moderate oxidation ability of the ZnO support, besides the promoted charge separation and transfer by Cu species.
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Affiliation(s)
- Qingning Yang
- Department of Chemical EngineeringUniversity College London Torrington PlaceLondonWC1E 7JEUK
| | - Xiyi Li
- Department of Chemical EngineeringUniversity College London Torrington PlaceLondonWC1E 7JEUK
| | - Lu Chen
- Department of Chemical EngineeringUniversity College London Torrington PlaceLondonWC1E 7JEUK
| | - Xiaoyu Han
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | - Feng Ryan Wang
- Department of Chemical EngineeringUniversity College London Torrington PlaceLondonWC1E 7JEUK
| | - Junwang Tang
- Department of Chemical EngineeringUniversity College London Torrington PlaceLondonWC1E 7JEUK
- Industrial Catalysis Centre, Department of Chemical EngineeringTsinghua UniversityBeijing100084China
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6
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Chen J, Wang F, Li X, Wang L, Yu W, Sun K, Yang J. Homocoupling of benzyl pyridyl ethers via visible light-mediated deoxygenation. Chem Commun (Camb) 2023; 59:11409-11412. [PMID: 37670690 DOI: 10.1039/d3cc03002d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
The photocatalytic coupling of ethers is uncommon because of the challenges in breaking C-O bonds and low selectivity. Herein, we report a visible light-mediated deoxygenation homocoupling of benzyl pyridyl ethers via their pyridium salts. This approach enables C(sp3)-O bond homolysis under mild conditions. Mechanistic experiments support the radical nature of the reaction. This method is highly compatible with electron-withdrawing groups and has potential applications for drug precursor synthesis.
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Affiliation(s)
- Jingtian Chen
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Nano-biotechnology, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao, 066004, P. R. China.
| | - Fan Wang
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Nano-biotechnology, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao, 066004, P. R. China.
| | - Xiang Li
- Qinhuangdao Customs Technical Center, Qinhuangdao, 066004, P. R. China
| | - Lei Wang
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Nano-biotechnology, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao, 066004, P. R. China.
| | - Wei Yu
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Nano-biotechnology, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao, 066004, P. R. China.
| | - Keju Sun
- Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao, 066004, P. R. China
| | - Jingyue Yang
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Nano-biotechnology, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao, 066004, P. R. China.
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7
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Deng T, Tian J, Zhu J, Yan B. Reactive separation of β-bromoethylbenzene from α-β-bromoethylbenzene mixtures: a Zn 2+-mediated radical polymerization mechanism. Chem Commun (Camb) 2022; 58:1219-1222. [PMID: 34985057 DOI: 10.1039/d1cc05753g] [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
A Zn2+-induced reactive separation method for the purification of β-bromoethylbenzene from α-β-bromoethylbenzene mixtures is discovered, where the selective decomposition of α-bromoethylbenzene follows a radical mechanism. Zn2+ facilitates the homolysis of the C-Br bond of halohydrocarbons with benzyl bromide, enabling the separation of the corresponding isomers with almost identical physical properties.
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Affiliation(s)
- Tianyu Deng
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
| | - Jiaming Tian
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
| | - Junqiu Zhu
- Shandong Exceris Chemical Co., LTD, Shandong 262714, China
| | - Binhang Yan
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
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8
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Fang F, Kang JX, Xu CQ, Chang J, Zhang J, Li S, Chen X. Which Type of Pincer Complex Is Thermodynamically More Stable? Understanding the Structures and Relative Bond Strengths of Group 10 Metal Complexes Supported by Benzene-Based PYCYP Pincer Ligands. Inorg Chem 2021; 60:18924-18937. [PMID: 34878759 DOI: 10.1021/acs.inorgchem.1c02722] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The influence of the pincer platform composition and substitution on the reactivity and physical properties of pincer complexes can be easily explored through different experimental techniques. However, the influence of these factors on the molecular structures and thermodynamic stability of pincer complexes is usually very subtle and cannot always be unambiguously established. To rationalize this subtle influence, a survey of crystallographic data from 130 group 10 metal pincer complexes supported by benzene-based PYCYP pincer ligands, [2,6-(R2PY)2C6H3-nR'n]MX (Y = CH2, NH, O, S; M = Ni, Pd, Pt; R = tBu, iPr, Ph, Cy, Me; R' = CO2Me, tBu, CF3, Ac; n = 0-2; X = F, Cl, Br, I, H, SH, SPh, SBn, Ph, Me, N3, NCS), was carried out. Theoretical calculations for some selected complexes were performed to evaluate the relative bond strength. It was found that the M-Cipso bond length decreases following the linker series of CH2 > NH > O and that the relative M-Cipso bond strength increases following the linker series of CH2 < NH < O. In most cases, the M-P bond length decreases following the linker series of NH > CH2 > O. The relative M-P bond strength increases following the linker series of CH2 < NH < O. A comparison of the thermochemical balance for the isodesmic displacement of the side-arm interactions with PH3 as a probe ligand indicated that the Ni-P bond in a PCCCP-type pincer complex is far less difficult to break compared with that in a POCOP-type complex. As a result, with the same donor substituents and the same auxiliary ligand, the POCOP-type pincer complexes are thermodynamically more stable than the PCCCP complexes. The influence of other backbone and donor substitutions as well as the pincer platform composition on the M-Cipso, M-P, and M-X bond lengths, relative bond strengths, and P-M-P bite angles was also discussed.
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Affiliation(s)
- Fei Fang
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jia-Xin Kang
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Cong-Qiao Xu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Jiarui Chang
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jie Zhang
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Shujun Li
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.,College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
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9
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Rationally Designed Metal Cocatalyst for Selective Photosynthesis of Bibenzyls via Dehalogenative C–C Homocoupling. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00102] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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10
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Mangin LP, Michaud G, Zargarian D. A Wacker-Type Strategy for the Synthesis of Unsymmetrical POC sp3E-Nickel Pincer Complexes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00590] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Loïc P. Mangin
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Guillaume Michaud
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
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Das PK, Chakraborty P, Gholap SS, Gonçalves TP, Yao C, Li H, Lai Z, Emwas AH, Huang KW. Mechanistic elucidation of the role of metal oxidation states in nickel mediated electrocatalytic coupling of benzyl halides. GREEN SYNTHESIS AND CATALYSIS 2020. [DOI: 10.1016/j.gresc.2020.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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12
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Shafiei-Haghighi S, Brar A, Unruh DK, Cozzolino AF, Findlater M. Experimental and Computational Studies of Phosphine Ligand Displacement in Iridium–Pincer Complexes Employing Pyridine or Acetonitrile. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00202] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sara Shafiei-Haghighi
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Aneelman Brar
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Daniel K. Unruh
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Anthony F. Cozzolino
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Michael Findlater
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
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13
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Affiliation(s)
- Si Chen
- Key Laboratory of Organofluorine ChemistryCenter for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Ling‐Ling Road Shanghai 200032 China
| | - Yanchuan Zhao
- Key Laboratory of Organofluorine ChemistryCenter for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Ling‐Ling Road Shanghai 200032 China
- Key Laboratory of Energy Regulation MaterialsShanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Ling‐Ling Road Shanghai 200032 China
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14
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Roque‐Ramires MA, Shen L, Le Lagadec R. Synthesis of Non‐Symmetric Ruthenium(II) POCOP Pincer Complexes and Their Bimetallic Derivatives by π‐Coordination of Arenophile Fragments. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Manuel A. Roque‐Ramires
- Instituto de Química, UNAM, Circuito Exterior s/n Ciudad Universitaria 04510 Ciudad de México Mexico
| | | | - Ronan Le Lagadec
- Instituto de Química, UNAM, Circuito Exterior s/n Ciudad Universitaria 04510 Ciudad de México Mexico
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15
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Joksch M, Agarwala H, Ferro M, Michalik D, Spannenberg A, Beweries T. A Comparative Study on the Thermodynamics of Halogen Bonding of Group 10 Pincer Fluoride Complexes. Chemistry 2020; 26:3571-3577. [PMID: 31846108 PMCID: PMC7154528 DOI: 10.1002/chem.201904863] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Indexed: 12/13/2022]
Abstract
The thermodynamics of halogen bonding of a series of isostructural Group 10 metal pincer fluoride complexes of the type [(3,5‐R2‐tBuPOCOPtBu)MF] (3,5‐R2‐tBuPOCOPtBu=κ3‐C6HR2‐2,6‐(OPtBu2)2 with R=H, tBu, COOMe; M=Ni, Pd, Pt) and iodopentafluorobenzene was investigated. Based on NMR experiments at different temperatures, all complexes 1‐tBu (R=tBu, M=Ni), 2‐H (R=H, M=Pd), 2‐tBu (R=tBu, M=Pd), 2‐COOMe (R=COOMe, M=Pd) and 3‐tBu (R=tBu, M=Pt) form strong halogen bonds with Pd complexes showing significantly stronger binding to iodopentafluorobenzene. Structural and computational analysis of a model adduct of complex 2‐tBu with 1,4‐diiodotetrafluorobenzene as well as of structures of iodopentafluorobenzene in toluene solution shows that formation of a type I contact occurs.
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Affiliation(s)
- Markus Joksch
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein-Strasse 29a18059RostockGermany
| | - Hemlata Agarwala
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein-Strasse 29a18059RostockGermany
- Department of Synthetic Molecular ChemistryÅngström Laboratory, Box 523Uppsala UniversityLägerhyddsvägen 175120UppsalaSweden
| | - Monica Ferro
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein-Strasse 29a18059RostockGermany
- Politecnico di MilanoDipartimento di ChimicaMateriali e Ing. Chimica “G. Natta”Via L. Mancinelli 720131MilanoItaly
| | - Dirk Michalik
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein-Strasse 29a18059RostockGermany
- Institut für ChemieUniversität RostockAlbert-Einstein-Strasse 3a18059RostockGermany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein-Strasse 29a18059RostockGermany
| | - Torsten Beweries
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein-Strasse 29a18059RostockGermany
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16
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Affiliation(s)
- Nadeesha P. N. Wellala
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hai T. Dong
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
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17
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Li Y, Krause JA, Guan H. Cobalt POCOP Pincer Complexes via Ligand C–H Bond Activation with Co2(CO)8: Catalytic Activity for Hydrosilylation of Aldehydes in an Open vs a Closed System. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00273] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yingze Li
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
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18
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19
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Huang MH, Hu J, Huang KW. Extending the Second-Generation Phosphorus-Nitrogen PN3
-Pincer Ligand Family through Ligand Post-Modification. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700205] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mei-Hui Huang
- KAUST Catalysis Center and Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - Jinsong Hu
- KAUST Catalysis Center and Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - Kuo-Wei Huang
- KAUST Catalysis Center and Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
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20
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Dehydrogenative coupling of alcohols to esters on a silica polyamine composite by immobilized PNN and PONOP pincer complexes of ruthenium. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Liu Y, Xiao S, Qi Y, Du F. Reductive Homocoupling of Organohalides Using Nickel(II) Chloride and Samarium Metal. Chem Asian J 2017; 12:673-678. [DOI: 10.1002/asia.201601712] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 01/24/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Yongjun Liu
- State Key Laboratory Base of Eco-chemical Engineering; Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P. R. China
| | - Shuhuan Xiao
- State Key Laboratory Base of Eco-chemical Engineering; Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P. R. China
| | - Yan Qi
- State Key Laboratory Base of Eco-chemical Engineering; Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P. R. China
| | - Feng Du
- State Key Laboratory Base of Eco-chemical Engineering; Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P. R. China
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22
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Park G, Yi SY, Jung J, Cho EJ, You Y. Mechanism and Applications of the Photoredox Catalytic Coupling of Benzyl Bromides. Chemistry 2016; 22:17790-17799. [DOI: 10.1002/chem.201603517] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Gyurim Park
- Department of Food Science and Engineering; Ewha Womans University; Seoul 03760 Republic of Korea
| | - Seung Yeon Yi
- Department of Chemistry and Nano Science; Ewha Womans University; Seoul 03760 Republic of Korea
| | - Jaehun Jung
- Department of Applied Chemistry; Hanyang University; Ansan 15588 Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry; Chung-Ang University; Seoul 06974 Republic of Korea
| | - Youngmin You
- Division of Chemical Engineering and Materials Science; Ewha Womans University; Seoul 03760 Republic of Korea
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23
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Sahoo SK. An unprecedented oxidative intermolecular homo coupling reaction between two sp3C–sp3C centers under metal-free condition. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.092] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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24
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Murugesan S, Kirchner K. Non-precious metal complexes with an anionic PCP pincer architecture. Dalton Trans 2016; 45:416-39. [PMID: 26608262 DOI: 10.1039/c5dt03778f] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This perspective article provides an overview of the advancements in the field of non-precious metal complexes featuring anionic PCP pincer ligands with the inclusion of aliphatic systems. It covers research from the beginning in 1976 until late 2015 and provides a summary of key developments in this area, which is, to date, limited to the metals nickel, cobalt, iron, and molybdenum. While the research in nickel PCP complexes is already quite extensive, the chemistry of cobalt, iron, and molybdenum PCP complexes is comparatively sparse. With other non-precious metals such as copper, manganese, chromium or vanadium no PCP complexes are known as yet. In the case of nickel PCP complexes already many catalytic applications such as Suzuki-Miyaura coupling, C-S cross coupling, Kharasch and Michael additions, hydrosilylation of aldehydes and ketones, cyanomethylation of aldehydes, and hydroamination of nitriles were reported. While iron PCP complexes were found to be active catalysts for the hydrosilylation of aldehydes and ketones as well as the dehydrogenation of ammonia-borane, cobalt PCP complexes were not applied to any catalytic reactions. Surprisingly, only one molybdenum PCP complex is reported, which was capable of cleaving dinitrogen to give a nitride complex. This perspective underlines that the combination of cheap and abundant metals such as nickel, cobalt, and iron with PCP pincer ligands may result in the development of novel, versatile, and efficient catalysts for atom-efficient catalytic reactions.
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Affiliation(s)
- Sathiyamoorthy Murugesan
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
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25
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Teo WJ, Wang Z, Xue F, Andy Hor TS, Zhao J. Cyclopentadienyl nickel(ii) N,C-chelating benzothiazolyl NHC complexes: synthesis, characterization and application in catalytic C–C bond formation reactions. Dalton Trans 2016; 45:7312-9. [DOI: 10.1039/c6dt00252h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
CpNi(ii) N,C-chelating benzothiazolyl NHC complexes have been synthesized. They are efficient catalysts for the homo-coupling of benzyl bromide in the presence of MeMgCl at r.t. with good function group tolerance.
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Affiliation(s)
- Wei Jie Teo
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
| | - Zhe Wang
- Institute of Materials Research and Engineering
- Agency for Science
- Technology and Research
- Singapore 138634
- Singapore
| | - Fei Xue
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
| | - T. S. Andy Hor
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
- Institute of Materials Research and Engineering
| | - Jin Zhao
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
- Institute of Materials Research and Engineering
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26
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Fallon BJ, Corcé V, Amatore M, Aubert C, Chemla F, Ferreira F, Perez-Luna A, Petit M. A well-defined low-valent cobalt catalyst Co(PMe3)4 with dimethylzinc: a simple catalytic approach for the reductive dimerization of benzyl halides. NEW J CHEM 2016. [DOI: 10.1039/c6nj03265f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We report a simple catalytic version of a cobalt-catalysed reductive homocoupling of benzyl halides by combining Co(PMe3)4 and Me2Zn.
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Affiliation(s)
- Brendan J. Fallon
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
| | - Vincent Corcé
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
| | - Muriel Amatore
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
| | - Corinne Aubert
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
| | - Fabrice Chemla
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
| | - Franck Ferreira
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
| | - Alejandro Perez-Luna
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
| | - Marc Petit
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- Case 229
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27
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Ramakrishnan S, Chakraborty S, Brennessel WW, Chidsey CED, Jones WD. Rapid oxidative hydrogen evolution from a family of square-planar nickel hydride complexes. Chem Sci 2015; 7:117-127. [PMID: 29861972 PMCID: PMC5950828 DOI: 10.1039/c5sc03189c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 10/28/2015] [Indexed: 11/21/2022] Open
Abstract
One-electron oxidation in a family of square planar nickel hydride complexes leads to facile H2 evolution.
A series of square-planar nickel hydride complexes supported by bis(phosphinite) pincer ligands with varying substituents (–OMe, –Me, and –But) on the pincer backbone have been synthesized and completely characterized by NMR spectroscopy, IR spectroscopy, elemental analysis, and X-ray crystallography. Their cyclic voltammograms show irreversible oxidation peaks (peak potentials from 101 to 316 mV vs. Fc+/Fc) with peak currents consistent with overall one-electron oxidations. Chemical oxidation by the one-electron oxidant Ce(NBu4)2(NO3)6 was studied by NMR spectroscopy, which provided quantitative evidence for post-oxidative H2 evolution leading to a solvent-coordinated nickel(ii) species with the pincer backbone intact. Bulk electrolysis of the unsubstituted nickel hydride (3a) showed an overall one-electron stoichiometry and gas chromatographic analysis of the headspace gas after electrolysis further confirmed stoichiometric production of dihydrogen. Due to the extremely high rate of the post-oxidative chemical process, electrochemical simulations have been used to establish a lower limit of the bimolecular rate constant (kf > 107 M–1 s–1) for the H2 evolution step. To the best of our knowledge, this is the fastest known oxidative H2 evolution process observed in transition metal hydrides. Quantum chemical calculations based on DFT indicate that the one-electron oxidation of the nickel hydride complex provides a strong chemical driving force (–90.3 kcal mol–1) for the production of H2 at highly oxidizing potentials.
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Affiliation(s)
| | - Sumit Chakraborty
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - William W Brennessel
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | | | - William D Jones
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
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28
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Adhikary A, Krause JA, Guan H. Configurational Stability and Stereochemistry of P-Stereogenic Nickel POCOP-Pincer Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00402] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anubendu Adhikary
- Department
of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department
of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department
of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
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29
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Khan S, Ghatak A, Bhar S. Reductive homocoupling of benzylic halides in aqueous medium using recyclable alumina-supported nickel nanoparticles. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.106] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Asay M, Morales-Morales D. Recent Advances on the Chemistry of POCOP–Nickel Pincer Compounds. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_135] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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31
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Wilson GLO, Abraha M, Krause JA, Guan H. Reactions of phenylacetylene with nickel POCOP-pincer hydride complexes resulting in different outcomes from their palladium analogues. Dalton Trans 2015; 44:12128-36. [DOI: 10.1039/c5dt00161g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel POCOP-pincer hydride complexes react with phenylacetylene to afford alkenyl complexes whereas the palladium analogues give alkynyl complexes.
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Affiliation(s)
| | - Medhanei Abraha
- Department of Chemistry
- University of Cincinnati
- Cincinnati
- USA
| | | | - Hairong Guan
- Department of Chemistry
- University of Cincinnati
- Cincinnati
- USA
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32
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Hao J, Vabre B, Zargarian D. POCOP-Ligated Nickel Siloxide Complexes: Syntheses, Characterization, and Reactivities. Organometallics 2014. [DOI: 10.1021/om500916d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jingjun Hao
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Boris Vabre
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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33
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Vabre B, Petiot P, Declercq R, Zargarian D. Fluoro and Trifluoromethyl Derivatives of POCOP-Type Pincer Complexes of Nickel: Preparation and Reactivities in SN2 Fluorination and Direct Benzylation of Unactivated Arenes. Organometallics 2014. [DOI: 10.1021/om500472b] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Boris Vabre
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Pauline Petiot
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Richard Declercq
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Davit Zargarian
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
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34
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Jonasson KJ, Wendt OF. Synthesis and characterization of a family of POCOP pincer complexes with nickel: reactivity towards CO2 and phenylacetylene. Chemistry 2014; 20:11894-902. [PMID: 25080339 DOI: 10.1002/chem.201403246] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Indexed: 11/08/2022]
Abstract
A cyclohexyl-based POC sp 3OP pincer ligand (POC sp 3OP=cis-1,3-bis(di-tert-butylphosphinito)cyclohexyl) cyclometalates with nickel to generate a series of new POC sp 3OP-supported Ni(II) complexes, including the halide, hydride, methyl, and phenyl species. trans-[NiCl{cis-1,3-bis(di-tert-butylphosphinito)cyclohexane}], [(POC sp 3OP)NiCl] (1 a) and the analogous bromide complex (1 b) were synthesized and fully characterized by NMR spectroscopy and X-ray crystallography. Cyclic voltammetry measurements of 1 a and 1 b alongside their bis(phosphine) analogues [(PC sp 3P)NiCl] (2 a) and [(PC sp 3P)NiCl] (2 a) (PC sp 3P=cis-1,3-bis(di-tert-butylphosphino)cyclohexyl) indicate a reduced electron density at the metal center upon introducing electron-withdrawing oxygen atoms in the pincer arms. The methyl [(POC sp 3OP)NiMe] (3) and phenyl [(POC sp 3OP)NiPh] (4) complexes were formed from 1 a by reaction with the corresponding organolithium reagents. 1 a also reacts with LiAlH4 to give the hydride complex [(POC sp 3OP)NiH] (5). The methyl complex 3 reacts with phenyl acetylene to give the acetylide complex [(POC sp 3OP)NiCCPh] (6). The reactivity of compounds 3-5 towards CO2 was studied. The hydride complex 5 and the methyl complex 3 both underwent CO2 insertion to form the formate species [(POC sp 3OP)NiOCOH] (7) and acetate species [(POC sp 3OP)NiOCOCH3 ] (8), respectively, although with a higher barrier of insertion in the latter case. Compound 4 was unreactive towards CO2 even at elevated temperatures. Complexes 3-8 were all characterized by NMR spectroscopy and X-ray crystallography.
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Affiliation(s)
- Klara J Jonasson
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 22100 Lund (Sweden)
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35
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Jia WG, Li DD, Yan LQ, Sheng EH, Dai YC. Preparation, structures, and properties of nickel complexes containing 2,6-bis[4′,4′-dimethyloxazolin-2′-yl]pyridine, a pincer ligand. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.886109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Wei-Guo Jia
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - Dan-Dan Li
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - Li-Qin Yan
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - En-Hong Sheng
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - Yuan-Chen Dai
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
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36
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Peng Y, Luo L, Yan CS, Zhang JJ, Wang YW. Ni-Catalyzed Reductive Homocoupling of Unactivated Alkyl Bromides at Room Temperature and Its Synthetic Application. J Org Chem 2013; 78:10960-7. [DOI: 10.1021/jo401936v] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Yu Peng
- State Key
Laboratory of Applied
Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and
Resources Utilization of Gansu Province, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Long Luo
- State Key
Laboratory of Applied
Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and
Resources Utilization of Gansu Province, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Chang-Song Yan
- State Key
Laboratory of Applied
Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and
Resources Utilization of Gansu Province, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jian-Jian Zhang
- State Key
Laboratory of Applied
Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and
Resources Utilization of Gansu Province, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Ya-Wen Wang
- State Key
Laboratory of Applied
Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and
Resources Utilization of Gansu Province, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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37
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38
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Vabre B, Spasyuk DM, Zargarian D. Impact of Backbone Substituents on POCOP-Ni Pincer Complexes: A Structural, Spectroscopic, and Electrochemical Study. Organometallics 2012. [DOI: 10.1021/om3009475] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Boris Vabre
- Département
de Chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
| | - Denis M. Spasyuk
- Département
de Chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
| | - Davit Zargarian
- Département
de Chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
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39
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Kwan ML, Conry SJ, Carfagna CS, Press LP, Ozerov OV, Hoffman NW, Sykora RE. {2,6-Bis[(2,6-diisopropyl-phosphan-yl)-oxy]-4-fluoro-phenyl-κ(3)P,C(1),P'}(1H-pyrazole-κN(2))nickel(II) hexa-fluoro-phosphate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:m1282-3. [PMID: 23125603 PMCID: PMC3470159 DOI: 10.1107/s1600536812039207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 09/13/2012] [Indexed: 11/29/2022]
Abstract
The title compound, [Ni(C18H30FO2P2)(C3H4N2)]PF6, was prepared by halide abstraction with TlPF6 in the presence of CH3CN in CDCl3 from the respective neutral pincer chlorido analogue followed by addition of pyrazole. The PO—C—OP pincer ligand acts in typical trans-P2 tridentate fashion to generate a distorted square-planar nickel structure. The Ni—N(pyrazole) distance is 1.925 (2) Å and the plane of the pyrazole ligand is rotated 56.2 (1)° relative to the approximate square plane surrounding the NiII center in which the pyrazole is bound to the NiII atom through its sp2-hybridized N atom. This Ni—N distance is similar to bond lengths in the other reported NiII pincer-ligand square-planar pyrazole complex structures; however, its dihedral angle is significantly larger than any of those for the latter set of pyrazole complexes.
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Affiliation(s)
- Man-Lung Kwan
- Department of Chemistry, John Carroll University, University Heights, OH 44118, USA
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