Structural organisation of [Ni(II)-Me(II)-Dtc] (Me = Zn, Cd, Hg) -: Dithiocarbamate complexes:: ESR, 13C and 15N CP/MAS NMR studies

Magnetically diluted systems of dithiocarbamate complexes of the type Cu-63,Cu-65/[Ni(II)-Me(II)-Dtc] (Me = Zn, Cd, Hg;Dtc = MDtc (dimethyl-) or EDtc (diethyldithiocarbamate)), which model the structural heterogeneity on the local, molecular and supramolecular levels, have been prepared and studied by means of ESR and solid state C-13 and N-15 CP/MAS NMR spectroscopy. Three possible structures of these dithiocarbamate complexes were unambiguously: identified in the composition of the samples under investigation: (i) the mononuclear square-planar, Ni(Dtc)(2); (ii) dinuclear with non-planar molecular configurations, Me-2(Dtc)(4) and (iii) heteropolynuclear complexes with a common composition of Me-2(Dtc)(4). nNi(Dtc)(2) (n = 1-4; Me = Zn, Cd, Hg). The latter is a newly proposed type of structure of dithiocarbamate complexes in the matrix of the model systems. (C) 1998 Elsevier Science Ltd. All rights reserved.