COMPLEXATION OF PALLADIUM CYANIDE WITH IMIDAZOLIDINE-2-THIONE AND ITSDERIVATIVES

Pd(CN)2 reacts with imidazolidine-2-thione (Imt), 1,3-diazinane-2-thio ne (Diaz), 1,3-diazipnane-2-thione (Diap) and their derivatives to yie ld complexes of stoichiometry [PdL2(CN)2] or [PdL'(CN)2] (L = Imt, Dia z or Diap and L'= Imt having N-Me, Et or Pr substituents), which were characterized by elemental analysis, i.r., H-1 and C-13 n.m.r. spectro scopy. Both mono- and bis ligand complexes are thought to be square pl anar with the monoligand binding to metal via sulphur (bridging) and,t he bis ligand via the monodentate thione group. The C-13 enriched (Pd( CN)2)-C-13 complex was prepared and the C-13 n.m.r. recorded. The C-2 resonance of C-13 n.m.r. of Imt, Diaz or Diap complexes of the copper( I), silver(I), gold(I) and palladium(II) were compared.