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Biswal P, Samser S, Nayak P, Chandrasekhar V, Venkatasubbaiah K. Cobalt(II)porphyrin-Mediated Selective Synthesis of 1,5-Diketones via an Interrupted-Borrowing Hydrogen Strategy Using Methanol as a C1 Source. J Org Chem 2021; 86:6744-6754. [PMID: 33902283 DOI: 10.1021/acs.joc.1c00476] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel cobalt(II)porphyrin-mediated acceptorless dehydrogenation of methanol is reported for the first time. This methodology has been applied for the coupling of a variety of ketones with methanol to produce 1,5-diketones along with H2 and H2O as the environment friendly byproducts. This paradigm was also demonstrated for a one-pot synthesis of substituted pyridines using a sequential addition protocol where the 1,5-diketones were generated in situ. From many experiments including those involving deuterium labeling, it is proposed that protonated cobalt(II)porphyrin methoxide complex acts as an intermediate to generate formaldehyde along with a metal hydride.
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Affiliation(s)
- Priyabrata Biswal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - Shaikh Samser
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - Prakash Nayak
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.,Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, Uttar Pradesh, India
| | - Krishnan Venkatasubbaiah
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
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2
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Bian Y, Tam CM, To CT, Qu X, Chan KS. Alkylation of Rhodium Porphyrin Complexes with Primary Alcohols under Basic Conditions. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yongjun Bian
- Department of Chemistry, The Chinese University of Hong Kong, Shatin 00, New Territories, Hong Kong, People’s Republic of China
| | - Chun Meng Tam
- Department of Chemistry, The Chinese University of Hong Kong, Shatin 00, New Territories, Hong Kong, People’s Republic of China
| | - Ching Tat To
- Department of Chemistry, The Chinese University of Hong Kong, Shatin 00, New Territories, Hong Kong, People’s Republic of China
| | - Xingyu Qu
- Department of Chemistry, The Chinese University of Hong Kong, Shatin 00, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin 00, New Territories, Hong Kong, People’s Republic of China
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3
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Azizi K, Akrami S, Madsen R. Manganese(III) Porphyrin‐Catalyzed Dehydrogenation of Alcohols to form Imines, Tertiary Amines and Quinolines. Chemistry 2019; 25:6439-6446. [DOI: 10.1002/chem.201900737] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 03/14/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Kobra Azizi
- Department of ChemistryTechnical University of Denmark 2800 Kgs. Lyngby Denmark
| | - Sedigheh Akrami
- Department of ChemistryTechnical University of Denmark 2800 Kgs. Lyngby Denmark
| | - Robert Madsen
- Department of ChemistryTechnical University of Denmark 2800 Kgs. Lyngby Denmark
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4
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Wang Z, Yin H, Yun L, Liu X, Fu X. Facile Rh-C Bond Cleavage of Rhodium(III) Benzyl Porphyrin Complex in DMSO with Strong Bases. Isr J Chem 2015. [DOI: 10.1002/ijch.201500039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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5
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Yamazaki SI, Yao M, Asahi M, Sato H, Yamano A, Ioroi T. Characterization of a Rh(iii) porphyrin–CO complex: its structure and reactivity with an electron acceptor. Dalton Trans 2015. [DOI: 10.1039/c5dt01453k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To analyse the electrocatalytic oxidation of carbon monoxide by Rh porphyrins, we isolated a CO-adduct of Rh octaethylporphyrin, and examined its properties and reactivity by IR, NMR, and X-ray crystallographic analyses.
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Affiliation(s)
- Shin-ichi Yamazaki
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
| | - Masaru Yao
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
| | - Masafumi Asahi
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
| | | | | | - Tsutomu Ioroi
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
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6
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Ghisolfi A, Condello F, Fliedel C, Rosa V, Braunstein P. Facile and Room-Temperature Activation of Csp3–Cl Bonds by Cheap and Air-Stable Nickel(II) Complexes of (N-Thioether) DPPA-Type Ligands. Organometallics 2014. [DOI: 10.1021/om501004d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Alessio Ghisolfi
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Francesca Condello
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Christophe Fliedel
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Vitor Rosa
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Pierre Braunstein
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
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7
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Lee SY, Lai TH, Hui YY, Chan KS. Hydroxide-promoted selective C(α)–C(β) bond activation of aliphatic ethers by rhodium(III) porphyrins. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Yun L, Wang Z, Fu X. Intramolecular oxidative cyclization of alkenes by rhodium/cobalt porphyrins in water. Inorg Chem Front 2014. [DOI: 10.1039/c4qi00066h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterocycle construction strategy: intramolecular oxidative cyclization of alkenes was realized by rhodium(iii)/cobalt(iii) porphyrins in water.
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Affiliation(s)
- Lin Yun
- Beijing National Laboratory for Molecular Sciences
- State Key Lab of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing, China
| | - Zikuan Wang
- Beijing National Laboratory for Molecular Sciences
- State Key Lab of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing, China
| | - Xuefeng Fu
- Beijing National Laboratory for Molecular Sciences
- State Key Lab of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing, China
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9
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Ling Z, Yun L, Liu L, Wu B, Fu X. Aerobic oxidative N-dealkylation of tertiary amines in aqueous solution catalyzed by rhodium porphyrins. Chem Commun (Camb) 2013; 49:4214-6. [DOI: 10.1039/c2cc37263k] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Chan CS, Lee SY, Chan KS. Mild and Selective C(CO)–C(α) Bond Activation of Ketones with Rhodium(III) Porphyrin β-Hydroxyethyl. Organometallics 2012. [DOI: 10.1021/om3009519] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chung Sum Chan
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Siu Yin Lee
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
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11
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Lin WC, Hsaio DZ, Chang WP, Chen JH, Wang SS, Tung JY. Molecular structures of Cu(II), Rh(III) complexes of 2-N substituted N-confused porphyrin inner C-oxide. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.05.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Fung HS, Li BZ, Chan KS. Mild and Selective C(CO)–C(α) Bond Cleavage of Ketones by Rhodium(III) Porphyrins: Scope and Mechanism. Organometallics 2012. [DOI: 10.1021/om200788p] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong Sang Fung
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s
Republic of China
| | - Bao Zhu Li
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s
Republic of China
| | - Kin Shing Chan
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s
Republic of China
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13
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Lee SY, Lai TH, Choi KS, Chan KS. Room-Temperature Selective Aliphatic Carbon–Carbon Bond Activation and Functionalization of Ethers by Rhodium(II) Porphyrin. Organometallics 2011. [DOI: 10.1021/om200280w] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Siu Yin Lee
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People’s Republic of China
| | - Tsz Ho Lai
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People’s Republic of China
| | - Kwong Shing Choi
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People’s Republic of China
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14
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Biffinger JC, Uppaluri S, Sun H, DiMagno SG. Ligand Fluorination to Optimize Preferential Oxidation (PROX) of Carbon Monoxide by Water-Soluble Rhodium Porphyrins. ACS Catal 2011; 1:764-771. [PMID: 21949596 DOI: 10.1021/cs2001187] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Catalytic, low temperature preferential oxidation (PROX) of carbon monoxide by aqueous [5,10,15,20-tetrakis(4-sulfonatophenyl)-2,3,7,8,12,13,17,18-octafluoroporphyrinato]rhodium(III) tetrasodium salt, (1[Rh(III)]) and [5,10,15,20-tetrakis(3-sulfonato-2,6-difluorophenyl)-2,3,7,8,12,13,17,18-octafluoroporphyrinato]rhodium(III) tetrasodium salt, (2[Rh(III)]) is reported. The PROX reaction occurs at ambient temperature in buffered (4 ≤ pH ≤ 13) aqueous solutions. Fluorination on the porphyrin periphery is shown to increase the CO PROX reaction rate, shift the metal centered redox potentials, and acidify ligated water molecules. Most importantly, β-fluorination increases the acidity of the rhodium hydride complex (pK(a) = 2.2 ± 0.2 for 2[Rh-D]); the dramatically increased acidity of the Rh(III) hydride complex precludes proton reduction and hydrogen activation near neutral pH, thereby permitting oxidation of CO to be unaffected by the presence of H(2). This new fluorinated water-soluble rhodium porphyrin-based homogenous catalyst system permits preferential oxidation of carbon monoxide in hydrogen gas streams at 308 °K using dioxygen or a sacrificial electron acceptor (indigo carmine) as the terminal oxidant.
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Affiliation(s)
- Justin C. Biffinger
- Department of Chemistry and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588-0304, United States
- U.S. Naval Research Laboratory, Chemistry Division, Washington, D.C. 20375, United States
| | - ShriHarsha Uppaluri
- Department of Chemistry and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588-0304, United States
| | - Haoran Sun
- Department of Chemistry and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588-0304, United States
- University of South Dakota, Vermillion, South Dakota 57069, United States
| | - Stephen G. DiMagno
- Department of Chemistry and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588-0304, United States
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15
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Sarkar S, Li S, Wayland BB. Hydrogen and methanol exchange processes for (TMP)Rh-OCH3(CH3OH) in binary solutions of methanol and benzene. Inorg Chem 2011; 50:3313-9. [PMID: 21428303 DOI: 10.1021/ic1020466] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tetramesityl porphinato rhodium(III) methoxide ((TMP)Rh-OCH(3)) binds with methanol in benzene to form a 1:1 methanol complex ((TMP)Rh-OCH(3)(CH(3)OH)) (1). Dynamic processes are observed to occur for the rhodium(III) methoxide methanol complex (1) that involve both hydrogen and methanol exchange. Hydrogen exchange between coordinated methanol and methoxide through methanol in solution results in an interchange of the environments for the non-equivalent porphyrin faces that contain methoxide and methanol ligands. Interchange of the environments of the coordinated methanol and methoxide sites in 1 produces interchange of the inequivalent mesityl o-CH(3) groups, but methanol ligand exchange occurs on one face of the porphyrin and the mesityl o-CH(3) groups remain inequivalent. Rate constants for dynamic processes are evaluated by full line shape analysis for the (1)H NMR of the mesityl o-CH(3) and high field methyl resonances of coordinated methanol and methoxide groups in 1. The rate constant for interchange of the inequivalent porphyrin faces is associated with hydrogen exchange between 1 and methanol in solution and is observed to increase regularly with the increase in the mole fraction of methanol. The rate constant for methanol ligand exchange between 1 and the solution varies with the solution composition and fluctuates in a manner that parallels the change in the activation energy for methanol diffusion which is a consequence of solution non-ideality from hydrogen bonded clusters.
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Affiliation(s)
- Sounak Sarkar
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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16
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Wu B, Zhang J, Yun L, Fu X. Mechanistic comparison of β-H elimination, β-OH elimination, and nucleophilic displacement reactions of β-hydroxy alkyl rhodium porphyrin complexes. Dalton Trans 2011; 40:2213-7. [DOI: 10.1039/c0dt01146k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Fung HS, Li BZ, Chan KS. Sterically Enhanced, Selective C(CO)−C(α) Bond Cleavage of a Ketones by Rhodium Porphyrin Methyl. Organometallics 2010. [DOI: 10.1021/om1007852] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong Sang Fung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Bao Zhu Li
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
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18
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Sarkar S, Li S, Wayland BB. Comparison of Rh−OCH3 and Rh−CH2OH Bond Dissociation Energetics from Methanol C−H and O−H Bond Reactions with Rhodium(II) Porphyrins. J Am Chem Soc 2010; 132:13569-71. [DOI: 10.1021/ja1035489] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sounak Sarkar
- Departments of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, and University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Shan Li
- Departments of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, and University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Bradford B. Wayland
- Departments of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, and University of Pennsylvania, Philadelphia, Pennsylvania 19104
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19
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20
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Cheung CW, Fung HS, Lee SY, Qian YY, Chan YW, Chan KS. Reactivity Studies of Iridium(III) Porphyrins with Methanol in Alkaline Media. Organometallics 2010. [DOI: 10.1021/om9008668] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chi Wai Cheung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Hong Sang Fung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Siu Yin Lee
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Ying Ying Qian
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Yun Wai Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
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21
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Fung HS, Chan YW, Cheung CW, Choi KS, Lee SY, Qian YY, Chan KS. Reactivity Studies of Rhodium(III) Porphyrins with Methanol in Alkaline Media. Organometallics 2009. [DOI: 10.1021/om801029k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hong Sang Fung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Yun Wai Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Chi Wai Cheung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kwong Shing Choi
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Siu Yin Lee
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Ying Ying Qian
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
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22
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Blank B, Glatz G, Kempe R. Single and Double CCl-Activation of Methylene Chloride by P,N-ligand Coordinated Rhodium Complexes. Chem Asian J 2009; 4:321-7. [DOI: 10.1002/asia.200800359] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Chan YW, Chan KS. Base-Promoted Carbon−Hydrogen Bond Activation of Alkanes with Rhodium(III) Porphyrin Complexes. Organometallics 2008. [DOI: 10.1021/om800397p] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yun Wai Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
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24
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Mora G, Darses S, Genet JP. Tandem Catalysis: Access to Ketones from Aldehydes and Arylboronic Acidsvia Rhodium-Catalyzed Addition/Oxidation. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600530] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Poriel C, Ferrand Y, Le Maux P, Paul-Roth C, Simonneaux G, Rault-Berthelot J. Anodic oxidation and physicochemical properties of various porphyrin-fluorenes or -spirobifluorenes: Synthesis of new polymers for heterogeneous catalytic reactions. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2005.05.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Reactions of Cu3(dppm)3(μ3-OH)(ClO4)2 (dppm=bis-(diphenylphosphino) methane) with Soft Heterocumulenes. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.05.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Gaunt JA, Gibson VC, Haynes A, Spitzmesser SK, White AJP, Williams DJ. Bis(imino)carbazolide Complexes of Rhodium: Highly Nucleophilic Ligands Exerting a Dramatic Accelerating Effect on MeI Oxidative Addition. Organometallics 2004. [DOI: 10.1021/om034309d] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph A. Gaunt
- Department of Chemistry, Imperial College, Exhibition Road, London, SW7 2AY, U.K., and Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
| | - Vernon C. Gibson
- Department of Chemistry, Imperial College, Exhibition Road, London, SW7 2AY, U.K., and Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
| | - Anthony Haynes
- Department of Chemistry, Imperial College, Exhibition Road, London, SW7 2AY, U.K., and Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
| | - Stefan K. Spitzmesser
- Department of Chemistry, Imperial College, Exhibition Road, London, SW7 2AY, U.K., and Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
| | - Andrew J. P. White
- Department of Chemistry, Imperial College, Exhibition Road, London, SW7 2AY, U.K., and Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
| | - David J. Williams
- Department of Chemistry, Imperial College, Exhibition Road, London, SW7 2AY, U.K., and Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
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28
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Fu X, Wayland BB. Equilibrium Thermodynamic Studies in Water: Reactions of Dihydrogen with Rhodium(III) Porphyrins Relevant to Rh−Rh, Rh−H, and Rh−OH Bond Energetics. J Am Chem Soc 2004; 126:2623-31. [PMID: 14982472 DOI: 10.1021/ja039218m] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aqueous solutions of rhodium(III) tetra p-sulfonatophenyl porphyrin ((TSPP)Rh(III)) complexes react with dihydrogen to produce equilibrium distributions between six rhodium species including rhodium hydride, rhodium(I), and rhodium(II) dimer complexes. Equilibrium thermodynamic studies (298 K) for this system establish the quantitative relationships that define the distribution of species in aqueous solution as a function of the dihydrogen and hydrogen ion concentrations through direct measurement of five equilibrium constants along with dissociation energies of D(2)O and dihydrogen in water. The hydride complex ([(TSPP)Rh-D(D(2)O)](-4)) is a weak acid (K(a)(298 K) = (8.0 +/- 0.5) x 10(-8)). Equilibrium constants and free energy changes for a series of reactions that could not be directly determined including homolysis reactions of the Rh(II)-Rh(II) dimer with water (D(2)O) and dihydrogen (D(2)) are derived from the directly measured equilibria. The rhodium hydride (Rh-D)(aq) and rhodium hydroxide (Rh-OD)(aq) bond dissociation free energies for [(TSPP)Rh-D(D(2)O)](-4) and [(TSPP)Rh-OD(D(2)O)](-4) in water are nearly equal (Rh-D = 60 +/- 3 kcal mol(-1), Rh-OD = 62 +/- 3 kcal mol(-1)). Free energy changes in aqueous media are reported for reactions that substitute hydroxide (OD(-)) (-11.9 +/- 0.1 kcal mol(-1)), hydride (D(-)) (-54.9 kcal mol(-1)), and (TSPP)Rh(I): (-7.3 +/- 0.1 kcal mol(-1)) for a water in [(TSPP)Rh(III)(D(2)O)(2)](-3) and for the rhodium hydride [(TSPP)Rh-D(D(2)O)](-4) to dissociate to produce a proton (9.7 +/- 0.1 kcal mol(-1)), a hydrogen atom (approximately 60 +/- 3 kcal mol(-1)), and a hydride (D(-)) (54.9 kcal mol(-1)) in water.
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Affiliation(s)
- Xuefeng Fu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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