CHELATING VERSUS BRIDGING COORDINATION OF DITHIOPHOSPHATES IN COPPER-COMPLEXES - AN EHMO STUDY

Arguments in favour of the stabilization of Cu(II) dithiophosphates by intermolecular associations through LUMO (b) and high Energy occupied molecular orbitals of CuS4 core (d, e) or donor solvents are offered by Extended Huckel calculations. It is also shown that L(2)Cu(I) fragm ents tend to coordinate a chelating dithiophosphate if L has soft dono r atoms, and dimers or oligomers are foormed if L coordinates through hard donors.