Synthesis, characterization and X-ray crystal structures of asymmetric bis(dialkyldithiocarbamates) of zinc: Potential precursors for ZnS deposition

Four new bis(dialkyldithiocarbamates) of zinc, [Zn(S(2)CNMeR)(2)](2) (where R = Et, Pr-n, Pr-i and Bu(n): compounds 1, 2, 3 and 4 have been synthesized and characterized by X-ray crystallography, spectroscopic methods and differential scanning calorimetry. Xray crystallographic characterization indicated centrosymmetric dimeric structures for 1-4. The central region of each molecule, consisting of three edge-sharing four-membered rings, is structurally similar to the symmetric bis(dialkyldithiocarbamates) [Zn(S(2)CNEt(2))(2)](2) and [Zn(S2CNPr2i)(2)](2), characterized in earlier studies. Preliminary results on chemical vapour deposition of polycrystalline ZnS films from 4, which is considerably more volatile than the previously used precursor [Zn(S(2)CNEt(2))(2)](2), are reported. Copyright (C) 1996 Elsevier Science Ltd