Synthesis and Charcterization of Oxoyanadium(IV) Coordination Compounds Derived from 4[N-(4-Hydroxy-3-Methyl Benzalidene) Amino] Antipyrine Semicarbazone and 4[N-(3,4,5-Trimethoxybenzalidene) Amino] Antipyrine Semicarbazone†

Abstract

The interaction of various VO²⁺ salts in non-aqueous medium
with 4[N-(4-hydroxy-3-methoxy benzalidene) amino] antipyrine
semicarbazone (HMBAAPS) and 4[N-(3,4,5-trimethoxybenzali.·
dene) amino] antipyrine sernicarbazone (TMBAAPS) results in
the formation of the complexes of the general composition
VOX₂·L (X = Cl^-,  Br^-,  I^-,  NO₃^-  or NCS^-) and VO(ClO₄)₂·L·H₂O
(L = HMBAAPS or TMBAAPS). The ligands behave as tridentate
(N, N, O) donors in these complexes. All the complexes are pentacoordinated.
Thermal stabilities of the complexes have been studied
through thermogravimetric analysis.