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Article: Syntheses, electrochemistry and reactivities of pyridine amide complexes of chromium(III) and manganese(III)
Title | Syntheses, electrochemistry and reactivities of pyridine amide complexes of chromium(III) and manganese(III) |
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Authors | |
Issue Date | 1991 |
Publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton |
Citation | Journal Of The Chemical Society, Dalton Transactions, 1991 n. 4, p. 1071-1076 How to Cite? |
Abstract | Reactions of anhydrous CrCl3 with H2bpb and H2bpc [H2bpb = 1,2-bis(pyridine-2-carboxamido)benzene; H2bpc = 4,5-dichloro-1,2-bis(pyridine-2-carboxamido)benzene] in dimethylformamide and manganese(III) acetate with H2bpc in methanol, yielded the respective [CrIII(bpb)Cl]·xH2O, [CrIII(bpc)Cl]·H2O and [MnIII(bpc)(O2CMe)] complexes. The electrochemistry of the chromium(III) amide complexes has been studied by cyclic voltammetry. They exhibit reversible oxidation couples with E°values ranging from 0.28 to 0.80 V vs. ferrocenium-ferrocene. Except for [CrIII(bpb)(CN)2]- which has a quasireversible reduction couple at -1.97 V, the electrochemical reductions are irreversible. The complexes [CrIII(bpb)(H2O)2]ClO4, [CrIII(bpb)Cl(MeOH)] and [MnIII(bpc)(O2CMe)] have been shown to catalyse olefin epoxidation by iodosobenzene. With [Mn(bpc)(O2CMe)], catalytic oxidation of alkanes by PhIO has also been observed. An oxygen-rebound mechanism involving a Mnv=O or a Crv=O intermediate is proposed for the PhIO oxidation reactions. |
Persistent Identifier | http://hdl.handle.net/10722/168195 |
ISSN | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Leung, WH | en_US |
dc.contributor.author | Ma, JX | en_US |
dc.contributor.author | Yam, VWW | en_US |
dc.contributor.author | Che, CM | en_US |
dc.contributor.author | Poon, C | en_US |
dc.date.accessioned | 2012-10-08T03:16:09Z | - |
dc.date.available | 2012-10-08T03:16:09Z | - |
dc.date.issued | 1991 | en_US |
dc.identifier.citation | Journal Of The Chemical Society, Dalton Transactions, 1991 n. 4, p. 1071-1076 | en_US |
dc.identifier.issn | 1472-7773 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/168195 | - |
dc.description.abstract | Reactions of anhydrous CrCl3 with H2bpb and H2bpc [H2bpb = 1,2-bis(pyridine-2-carboxamido)benzene; H2bpc = 4,5-dichloro-1,2-bis(pyridine-2-carboxamido)benzene] in dimethylformamide and manganese(III) acetate with H2bpc in methanol, yielded the respective [CrIII(bpb)Cl]·xH2O, [CrIII(bpc)Cl]·H2O and [MnIII(bpc)(O2CMe)] complexes. The electrochemistry of the chromium(III) amide complexes has been studied by cyclic voltammetry. They exhibit reversible oxidation couples with E°values ranging from 0.28 to 0.80 V vs. ferrocenium-ferrocene. Except for [CrIII(bpb)(CN)2]- which has a quasireversible reduction couple at -1.97 V, the electrochemical reductions are irreversible. The complexes [CrIII(bpb)(H2O)2]ClO4, [CrIII(bpb)Cl(MeOH)] and [MnIII(bpc)(O2CMe)] have been shown to catalyse olefin epoxidation by iodosobenzene. With [Mn(bpc)(O2CMe)], catalytic oxidation of alkanes by PhIO has also been observed. An oxygen-rebound mechanism involving a Mnv=O or a Crv=O intermediate is proposed for the PhIO oxidation reactions. | en_US |
dc.language | eng | en_US |
dc.publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton | en_US |
dc.relation.ispartof | Journal of the Chemical Society, Dalton Transactions | en_US |
dc.title | Syntheses, electrochemistry and reactivities of pyridine amide complexes of chromium(III) and manganese(III) | en_US |
dc.type | Article | en_US |
dc.identifier.email | Yam, VWW:wwyam@hku.hk | en_US |
dc.identifier.email | Che, CM:cmche@hku.hk | en_US |
dc.identifier.authority | Yam, VWW=rp00822 | en_US |
dc.identifier.authority | Che, CM=rp00670 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1039/DT9910001071 | en_US |
dc.identifier.scopus | eid_2-s2.0-37049073388 | en_US |
dc.identifier.issue | 4 | en_US |
dc.identifier.spage | 1071 | en_US |
dc.identifier.epage | 1076 | en_US |
dc.identifier.isi | WOS:A1991FG57200019 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Leung, WH=7201504510 | en_US |
dc.identifier.scopusauthorid | Ma, JX=27168050700 | en_US |
dc.identifier.scopusauthorid | Yam, VWW=18539304700 | en_US |
dc.identifier.scopusauthorid | Che, CM=7102442791 | en_US |
dc.identifier.scopusauthorid | Poon, C=7202673504 | en_US |
dc.identifier.issnl | 1364-5447 | - |