Synthesis, structural characterization and thermal behaviour of bis(l-phenyl-l ,3 - butanedionato) non-oxovanadium(IV) aryloxides

Abstract

The non-oxovanadium(IV) aryloxides of composition [VCl(bzac)₂(OAr)^1,2] {where OAr^l= -OC₆H₄Bu^t-4 and OAr²= -OC₆H₄OMe-4; bzac= 1-phenyl-1,3-butane-dionato ion

(C₆H₅COCHCOCH₃)^-} have been synthesized by the direct reaction of VCl₂(bzac)₂ with 4-tert-butyl and 4-methoxy phenols in CCl₄ while [V(bzac)₂(OAr)₂^1,2] have been prepared from

VCl₂(bzac)₂ and trimethylsilyl derivatives of these phenols. The complexes have been characterized by elemental analyses, molar conductance, molecular mass determinations, FT- infrared, UV-vis, ESR spectroscopy and magnetic susceptibility measurements. Thermal behaviour of the complexes is consistent with the proposed formulations.