Synthesis, characterization and structure of the bis(methy-cyclopentadienyl)vanadium(IV) carboxylates

Abstract

The 1,1′-dimethylvanadocene dichloride ((C5H4CH3)2VCl2) reacts in aqueous solution with various carboxylic acids giving two different types of complexes. The 1,1′-dimethylvanadocene complexes of monocarboxylic acids (C5H4CH3) 2V(OOCR)2 (R = H, CCl3, CF3, C6H5) contain two monodentate carboxylic ligands, whereas oxalic and malonic acids act as chelate compounds of the formula (C5H4CH3)2V(OOC-A-COO) (A= -, CH2). The structure of the (C5H4CH3) 2V(OOCCF3)2 complex was determined by single crystal X-ray diffraction analysis. The isotropic and anisotropic EPR spectra of all the complexes prepared were recorded. The obtained EPR parameter values were found to be in agreement with proposed structures. © Central European Science Journals. All rights reserved.