Double complex salts based on tetraamminplatinum(ii) and vanadyl(iv) bisoxalate for the preparation of bimetallic Pt–V alloys

Abstract

An oxalate complex of vanadyl(IV) (Bu₄N)₂[VO(C₂O₄)₂] (I) was synthesized and used as a vanadium precursor. The synthesis and characterization of the double complex salts [Pt(NH₃)₄][VO(H₂O)(C₂O₄)₂]·2H₂O (III) and {[Pt(NH₃)₄][VO(C₂O₄)₂]}_n (IV) were carried out. The complexes obtained were characterized by IR and diffuse reflectance spectroscopy, single-crystal and powder X-ray diffraction, and EPR. The magnetic properties of I, III, and IV were also studied. The process of thermal decomposition of the synthesized complexes in reducing and inert atmospheres was studied, and the composition of the released gases was determined. Thermal decomposition of the salts in a hydrogen atmosphere at 600 °C resulted in the formation of a bimetallic solid solution, Pt_0.6V_0.4.