Peroxo aminopolycarboxylato vanadate(V) of an unusually low toxicity: synthesis and structure of the very stable K2[VO(O2)(C6H6NO6)]·2H2O
1995; Elsevier BV; Volume: 230; Issue: 1-2 Linguagem: Inglês
10.1016/0020-1693(94)04290-c
ISSN1873-3255
AutoresC. Djordjević, P.L. Wilkins, Ekkehard Sinn, Ray J. Butcher,
Tópico(s)Magnetism in coordination complexes
ResumoThe synthesis and structure of a monoperoxo vanadate(V) of the formula K2[VO(O2)NTA]·2H[2O, where NTA = C6H6NO6 3−, the nitrilotriacetate, is described. This stable compound crystallizes in the orthorhombic system (space group Pna21): a = 7.621(1), b = 13.002(3), c = 13.155(1) Å. A tetradentate NTA encloses vanadium in a distorted pentagonal bipyramid with an apical V = O group. Cis to it, in the pentagonal plane, a non-symmetrically coordinated peroxo group is located with an (OO) bond length of 1.438(4) Å. Complex IR spectra display rich absorption due to coordinated NTA, in addition to the characteristic V = O and (OO) stretching vibrations. Aqueous solutions of the complex show a (peroxo → V(V)) charge transfer band at γmax = 425 nm.
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