Synthesis and reactivity of diorganotellurium(IV) β-diketonates

Abstract

Diorganotellurium(IV) bis-(β-diketonates) of the formula R₂Te(acac)₂ {R=CH₃, C₆H₅, <em>p</em>-CH₃OC₆B₄} and R₂Te(dpm)₂ (acacH = 2,4-pentanedione; dpmH = 2,2,6,6-tetramethylheptane-3,5-dione) have been prepared by the reaction of R₂Te(OMe)₂ with (acacH) and (dpmH) in anhydrous conditions. R₂Te(acac)z reacts with halocarboxylic acids (R'COOH) (R'= CF₃, CC1₃, CHCl₂ or CH₂Cl) to give mixed ligand complexes of the type R₂Te(acac)(R'COO). A weak coordination of the β-diketone group with tellurium atom in the solid state is concluded. The geometry around the central tellurium atom is suggested on the basis of physicochemical studies.