Synthesis and Structural Studies on Nickel, Palladium and Rhenium Complexes of Potassium (1,1-Dicarboethoxy-2,2- dithioethene)

Abstract

Diethylmalonate was reacted with carbon disulfide and potassium hydroxide
in dioxane to give the bidentate ligand L {when L = potassium (1,1-dicarboethoxy-
2,2-dithioethene}.
The reaction of the ligand with some metal ions (NiII, PdII and ReV) in
methanol under nitrogen with (2: 1) ligand: metal ratio resulted in a stable anionic
complexes of the general formula: K2[M(L)2], K[ReO(L)2], (where: M = NiII, PdII,
L=1,1-dicarboethoxy-2,2-dithioethene).
All compounds have been characterised by some spectroscopic methods (I.R, U.Vvis,
HPLC, atomic absorption) microanalysis and conductivity measurements. These
studies showed that, the geometry around Ni and Pd is square planar, while Re
complex adopted square pyramid geometry