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A series of new oxo-vanadium(IV) complexes with octahedral coordinated vanadium centers

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A series of new oxo-vanadium(IV) complexes, [VOCl0.69(OH)0.31 (2,2′-bipy)2]Cl·2H2O (1, 2,2′-bipy = 2,2′-bipyridine) [(VO)2Cl4(4,4'-bipy)3 (H2O)2] (2, 4,4'-bipy = 4,4'-bipyridine), [VO(ida)(H2O)]n (3, H2ida = iminodiacetic acid), and [(VO)2(oa)4]n·4n(H3O)·n(H2O) (4, H2oa = oxalic acid), have been synthesized and structurally characterized. 1 contains a [VOCl0.69(OH)0.31(2,2′-bipy)2]+ cation, Cl anion and two free H2O molecules. 2 exhibits a binuclear centrosymmetric moiety built up from two [VOCl2(4,4'-bipy)(H2O)] units and one bridging 4,4'-bipy ligand, which provides a rare example of a 4,4'-bipy molecule acting as monodentate ligand. 3 displays a neutral chain [VO(ida)(H2O)]n constructed by the linkages of [VO(H2O)]2+ units and ida2− bridging ligands, while 4 offers the only example of three kinds of oa2- ligands coexisting within the same anionic chain [(VO)2(oa)4 4-]n. Their spectroscopic properties were investigated, and the magnetic susceptibility of 4 shows antiferromagnetic behavior.
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Keywords: Hydrothermal syntheses; magnetic properties; structure; vanadium

Document Type: Research Article

Affiliations: 1: Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing, P. R. China; 2: State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China

Publication date: April 3, 2019

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