期刊
DALTON TRANSACTIONS
卷 39, 期 41, 页码 9936-9940出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0dt00633e
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- JSPS
(Arylimido)vanadium(v) complexes, V(NAr)(OEt)Cl-2 [Ar = C6H5, p-BrC6H4, p-(MeO)C6H4] or V(NAr)Cl-3 [Ar = o-BrC6H4, o-(MeO)C6H4] were synthesized by the reaction of VO(OEt)Cl-2 or VOCl3, respectively, with the corresponding aryl isocyanates. X-Ray crystal structure determination for V(NAr)(OEt)Cl-2 (Ar = C6H5 and p-BrC6H4) elucidates the alkoxido-bridged dimeric building blocks [V(NAr)(OEt)Cl-2](2), wherein the substituent on the benzene ring was found to affect the character of the imido nitrogen. The V-51 NMR spectroscopic measurements indicated that the electronic state of the vanadium metal centre depends on the ligands connecting to the vanadium and the substituents on the benzene ring. The selective oxidative cross-coupling reaction of silyl ketene acetal with silyl enol ether was achieved using V(Np-BrC6H4)Cl-3 or V(No-BrC6H4)Cl-3.
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