Syntheses, Structures, and Properties of Vanadium(III) Complexes with the Hexadentate Ligand, Tetramethylenediamine-N,N,N',N'-tetraacetate, N,N'-Bis(2-pyridylmethyl)-1,2-ethanediamine-N,N'-diacetate, and N,N'-Bis(2-pyridylmethyl)-1,3-propanediamine-N,N'-d
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Vanadium(III) complexes with the hexadentate ligand, tetramethylenediamine-N,N,N′,N′-tetraacetate (tmdta), N,N′-bis(2-pyridylmethyl)-1,2-ethanediamine-N,N′-diacetate (bpedda), and N,N′-bis(2-pyridylmethyl)-1,3-propanediamine-N,N′-diacetate (bppdda), have been prepared. The structures of the tmdta (1) and bpedda (3) complexes have been determined by X-ray crystallography. The stereochemical property of complex 1 was compared with that of the corresponding Cr(III) complex (2), whose structure was also determined by X-ray crystallography. The tmdta complexes adopt a distorted octahedral structure, including a seven-membered chelate ring formed by the tetramethylenediamine moiety of the tmdta ligand. The bpedda complex has been determined to be a heptacoordinate complex with a distorted pentagonal bipyramidal geometry. The isolated bppdda complex has been characterized to be a μ-oxo dinuclear vanadium(III) complex on the basis of its spectral features. The tmdta and bpedda complexes do not yield a corresponding μ-oxo dinuclear vanadium(III) complex on base hydrolysis.
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公益社団法人 日本化学会 | 論文
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