Abstract
The synthesis, thermal behavior, spectroscopic properties and crystal structure of tetrabutylammonium Croconate Violet, (NBu 4) 2CV, are described. This compound crystallizes in the triclinic space group P 1 ¯ with a=12.440(1), b=19.003(2), c=19.679(2) Å; α=72.809(4), β=77.037(4), γ=84.702(6)° and Z=4. Additionally, from the reaction between (NBu 4) 2CV and ZnCl 2, the first Zn(II) complex containing the CV 2− dianion, (NBu 4) 4[Zn(CV) 3] was obtained. The complex was characterized by infrared and Raman spectroscopic techniques as well as by 1H and 13C NMR analysis. These data show that the coordination of pseudo-oxocarbon to the metal center occurs through the vicinal oxygen atoms in a chelating fashion while the nitrile groups are not involved in the formation of the complex.
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