Complexes of alkyl pyruvate benzoylhydrazones with Ti(IV), Zr(IV) and Hf(IV) chlorides

Abstract

The reactions between M(IV) chlorides (M = Ti, Zr and Hf) and alkyl pyruvate benzoylhydrazones [C₆H₅C(O)NHN = C(CH₃)C(O)OR,R = Me(HL), R = Et (HL')] have been carried out in 1:1 and 1:2 molar ratios to obtain hexa- and octa-coordinated metal complexes of the types [MCl₃L], [MCl₂L₂], [MCl₃L’] and [MCl₂L₂]. The coordination occurs through two carbonyl oxygens and azomethine nitrogen. All the new complexes have been characterized on the basis of elemental analyses, conductivity measurements, UV, IR and ¹H NMR spectral studies.