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Kobayashi K, Koizumi TA, Ghosh D, Kajiwara T, Kitagawa S, Tanaka K. Electrochemical behavior of a Rh(pentamethylcyclopentadienyl) complex bearing an NAD +/NADH-functionalized ligand. Dalton Trans 2018. [PMID: 29537007 DOI: 10.1039/c7dt04594h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A RhCp* (Cp* = pentamethylcyclopentadienyl) complex bearing an NAD+/NADH-functionalized ligand, [RhCp*(pbn)Cl]Cl ([1]Cl, pbn = (2-(2-pyridyl)benzo[b]-1,5-naphthyridine)), was synthesized. The cyclic voltammogram of [1]Cl in CH3CN shows two reversible redox waves at E1/2 = -0.58 and -1.53 V (vs. the saturated calomel electrode (SCE)), which correspond to the RhIII/RhI and pbn/pbn˙- redox couples, respectively. The addition of acetic acid to the solution afforded the proton-coupled two-electron reduction of [1]Cl at -0.62 V, from which [RhCp*(pbnHH)Cl]+ was selectively generated, probably via a hydride transfer from a RhIII-hydride intermediate to the pbn ligand. Complex [1]Cl is stable under acidic conditions, whereas a methyl proton of the Cp* moiety dissociates under basic conditions. The resulting anionic methylene group attacks the para carbon of the free pyridine of pbn, accompanied by protonation of the nitrogen atom of the ligand. As a result, treatment of [1]Cl with a base produces selectively the cyclic complex [1CH]Cl, which bears a reduced pbn framework (pbnCH). [1CH]Cl forms 1 : 1 adducts with PhCOO-via hydrogen bonding. A similar adduct, formed by a Ru-pbnHH scaffold and RCOO- (R = CH3, C6H5), has been reported to react with CO2 to produce HCOO- under concomitant regeneration of Ru-pbn. The adduct of [1CH]Cl with PhCOO-, however, lacks such hydride-donor ability, due to a steric barrier in the molecular structure of [1CH]Cl, which hampers the hydride transfer.
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Affiliation(s)
- Katsuaki Kobayashi
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan.
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Chellan P, Land KM, Shokar A, Au A, An SH, Taylor D, Smith PJ, Riedel T, Dyson PJ, Chibale K, Smith GS. Synthesis and evaluation of new polynuclear organometallic Ru(ii), Rh(iii) and Ir(iii) pyridyl ester complexes as in vitro antiparasitic and antitumor agents. Dalton Trans 2014; 43:513-26. [DOI: 10.1039/c3dt52090k] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Chellan P, Land KM, Shokar A, Au A, An SH, Taylor D, Smith PJ, Chibale K, Smith GS. Di- and Trinuclear Ruthenium-, Rhodium-, and Iridium-Functionalized Pyridyl Aromatic Ethers: A New Class of Antiparasitic Agents. Organometallics 2013. [DOI: 10.1021/om400493k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Prinessa Chellan
- Department
of Chemistry, University of Cape Town,
Private Bag, Rondebosch 7701, South Africa
| | - Kirkwood M. Land
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Ajit Shokar
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Aaron Au
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Seung Hwan An
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Dale Taylor
- Division of Pharmacology, Department
of Medicine, University of Cape Town, K45,
OMB, Groote Schuur Hospital, Observatory, 7925, South Africa
| | - Peter J. Smith
- Division of Pharmacology, Department
of Medicine, University of Cape Town, K45,
OMB, Groote Schuur Hospital, Observatory, 7925, South Africa
| | - Kelly Chibale
- Department
of Chemistry, University of Cape Town,
Private Bag, Rondebosch 7701, South Africa
- Institute of Infectious Disease and
Molecular Medicine, University of Cape Town, Rondebosch 7701, South Africa
| | - Gregory S. Smith
- Department
of Chemistry, University of Cape Town,
Private Bag, Rondebosch 7701, South Africa
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Kumar A, Pandey R, Gupta RK, Ghosh K, Pandey DS. Synthesis, characterization and photochemical properties of some ruthenium nitrosyl complexes. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.032] [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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Paz-Michel BA, González-Bravo FJ, Hernández-Muñoz LS, Paz-Sandoval MA. Chemistry of Butadienesulfinate Salts with (Cp*RhCl2)2 and the Reactivity of Their Derivatives with Tertiary Phosphines. Organometallics 2010. [DOI: 10.1021/om901108y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brenda A. Paz-Michel
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN Avenida IPN # 2508, San Pedro Zacatenco, C. P. 07360, D. F., México
| | - Felipe J. González-Bravo
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN Avenida IPN # 2508, San Pedro Zacatenco, C. P. 07360, D. F., México
| | - Lindsay S. Hernández-Muñoz
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN Avenida IPN # 2508, San Pedro Zacatenco, C. P. 07360, D. F., México
| | - M. Angeles Paz-Sandoval
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN Avenida IPN # 2508, San Pedro Zacatenco, C. P. 07360, D. F., México
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Gupta RK, Singh AK, Yadav M, Kumar P, Singh SK, Li P, Xu Q, Pandey DS. Synthesis and characterization of Ru(IV) and Rh(I) complexes containing phenylimidazole ligands. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.04.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Singh AK, Yadav M, Singh SK, Sunkari S, Pandey DS. Extended molecular networks based on Zn and Cd imparting N-substituted imidazole. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2009.12.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Synthesis, characterisation and theoretical studies on some piano-stool ruthenium and rhodium complexes containing substituted phenyl imidazole ligands. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.11.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Singh AK, Yadav M, Kumar P, Singh SK, Sunkari S, Pandey DS. Novel structures based on 1-(4-cyanophenyl)-imidazole resulting from weak bonding interactions. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.06.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yadav M, Singh AK, Pandey DS. First Examples of Heteroleptic Dipyrrin/η5-Pentamethylcyclopentadienyl Rhodium/Iridium(III) Complexes and Their Catalytic Activity. Organometallics 2009. [DOI: 10.1021/om900349v] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mahendra Yadav
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi-221 005 (U.P.), India
| | - Ashish Kumar Singh
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi-221 005 (U.P.), India
| | - Daya Shankar Pandey
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi-221 005 (U.P.), India
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Synthesis and characterization of Cp∗MCl(PR3)(S or W-η1-butadienesulfonyl) compounds of rhodium and iridium. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.01.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Singh SK, Joshi S, Singh AR, Saxena JK, Pandey DS. DNA Binding and Topoisomerase II Inhibitory Activity of Water-Soluble Ruthenium(II) and Rhodium(III) Complexes. Inorg Chem 2007; 46:10869-76. [DOI: 10.1021/ic700885m] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sanjay Kumar Singh
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi -221 005 (U.P.), India, and Division of Biochemistry, Central Drug Research Institute, Chattar Manzil P.O. Box 173, Lucknow-226 001 (U.P.), India
| | - Shweta Joshi
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi -221 005 (U.P.), India, and Division of Biochemistry, Central Drug Research Institute, Chattar Manzil P.O. Box 173, Lucknow-226 001 (U.P.), India
| | - Alok Ranjan Singh
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi -221 005 (U.P.), India, and Division of Biochemistry, Central Drug Research Institute, Chattar Manzil P.O. Box 173, Lucknow-226 001 (U.P.), India
| | - Jitendra Kumar Saxena
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi -221 005 (U.P.), India, and Division of Biochemistry, Central Drug Research Institute, Chattar Manzil P.O. Box 173, Lucknow-226 001 (U.P.), India
| | - Daya Shankar Pandey
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi -221 005 (U.P.), India, and Division of Biochemistry, Central Drug Research Institute, Chattar Manzil P.O. Box 173, Lucknow-226 001 (U.P.), India
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Singh SK, Chandra M, Dubey SK, Pandey DS. Tuned Helical Array of RhIII/IrIII Cp* Complexes with Polypyridyl Ligands. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600355] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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