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Article: Synthesis, electrochemistry, and oxygen-atom transfer reactions of dioxotungsten(VI) and -molybdenum(VI) complexes with N2O2 and N2S2 tetradentate ligands

TitleSynthesis, electrochemistry, and oxygen-atom transfer reactions of dioxotungsten(VI) and -molybdenum(VI) complexes with N2O2 and N2S2 tetradentate ligands
Authors
KeywordsTungsten complexes
Molybdenum complexes
Tetradentate ligands
Oxygen-atom transfer
Issue Date1999
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.eurjic.org
Citation
European Journal of Inorganic Chemistry, 1999, v. 1999 n. 2, p. 313-321 How to Cite?
AbstractA series of N2O2 tetradentate ligands with a range of substituents attached to the nitrogen atoms have been prepared (H2Ln) (n = 1–9). Treatment of these ligands and the N2S2 tetradentate ligand H2L10 with [WO2Cl2(DME)] (DME = 1,2-dimethoxyethane) in the presence of triethylamine leads to the formation of cis-dioxotungsten(VI) complexes [WO2(Ln)] (n = 1–10). Reaction of the N2O2 tetradentate ligands H2Ln (n = 1, 3–7) with ammonium molybdate tetrahydrate and dilute hydrochloric acid gives the corresponding molybdenum(VI) analogs [MoO2(Ln)] (n = 1, 3–7). These compounds have been spectroscopically characterized and the molecular structures of [WO2(Ln)] (n = 1, 2, 9) and [MoO2(L5)] have been established by X-ray diffraction analysis. These high-valent compounds participate in oxygen-atom transfer reactions and can catalyze the oxidation of benzoin with dimethyl sulfoxide. The complex [WO2(L10)], which contains an S-donor ligand, has lower reduction potential and higher reactivity toward oxo-transfer reactions than analogous tungsten complexes having N2O2 ligands. The kinetics of these catalytic processes along with the structure and electrochemistry of these dioxotungsten and -molybdenum complexes are described and compared.
Persistent Identifierhttp://hdl.handle.net/10722/69755
ISSN
2015 Impact Factor: 2.686
2015 SCImago Journal Rankings: 1.018

 

DC FieldValueLanguage
dc.contributor.authorWong, YLen_HK
dc.contributor.authorMa, JFen_HK
dc.contributor.authorLaw, WFen_HK
dc.contributor.authorYan, Yen_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorZhang, ZYen_HK
dc.contributor.authorMak, TCWen_HK
dc.contributor.authorNg, DKPen_HK
dc.date.accessioned2010-09-06T06:16:33Z-
dc.date.available2010-09-06T06:16:33Z-
dc.date.issued1999en_HK
dc.identifier.citationEuropean Journal of Inorganic Chemistry, 1999, v. 1999 n. 2, p. 313-321en_HK
dc.identifier.issn1434-1948en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69755-
dc.description.abstractA series of N2O2 tetradentate ligands with a range of substituents attached to the nitrogen atoms have been prepared (H2Ln) (n = 1–9). Treatment of these ligands and the N2S2 tetradentate ligand H2L10 with [WO2Cl2(DME)] (DME = 1,2-dimethoxyethane) in the presence of triethylamine leads to the formation of cis-dioxotungsten(VI) complexes [WO2(Ln)] (n = 1–10). Reaction of the N2O2 tetradentate ligands H2Ln (n = 1, 3–7) with ammonium molybdate tetrahydrate and dilute hydrochloric acid gives the corresponding molybdenum(VI) analogs [MoO2(Ln)] (n = 1, 3–7). These compounds have been spectroscopically characterized and the molecular structures of [WO2(Ln)] (n = 1, 2, 9) and [MoO2(L5)] have been established by X-ray diffraction analysis. These high-valent compounds participate in oxygen-atom transfer reactions and can catalyze the oxidation of benzoin with dimethyl sulfoxide. The complex [WO2(L10)], which contains an S-donor ligand, has lower reduction potential and higher reactivity toward oxo-transfer reactions than analogous tungsten complexes having N2O2 ligands. The kinetics of these catalytic processes along with the structure and electrochemistry of these dioxotungsten and -molybdenum complexes are described and compared.-
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.eurjic.orgen_HK
dc.relation.ispartofEuropean Journal of Inorganic Chemistryen_HK
dc.subjectTungsten complexes-
dc.subjectMolybdenum complexes-
dc.subjectTetradentate ligands-
dc.subjectOxygen-atom transfer-
dc.titleSynthesis, electrochemistry, and oxygen-atom transfer reactions of dioxotungsten(VI) and -molybdenum(VI) complexes with N2O2 and N2S2 tetradentate ligandsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1434-1948&volume=&spage=313&epage=321&date=1999&atitle=Synthesis,+electrochemistry,+and+oxygen-atom+transfer+reactions+of+dioxotungsten(VI)+and+-molybdenum(VI)+complexes+with+N2O2+and+N2S2+tetradentate+ligandsen_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.identifier.doi10.1002/(SICI)1099-0682(19990202)1999:2<313::AID-EJIC313>3.0.CO;2-Z-
dc.identifier.scopuseid_2-s2.0-0032803181-
dc.identifier.hkuros45470en_HK
dc.identifier.volume1999-
dc.identifier.issue2-
dc.identifier.spage313-
dc.identifier.epage321-

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