Molecular electrical conducting properties of a series of new complex salts, [n-Pr 4 N] 2 [M(ecda) 2 ] and heterobimetallics, VO[M(ecda) 2 ] [M=Ni(II), Cu(II), Zn(II) or Cd(II); ecda 2 - =1-ethoxycarbonyl-1-cyanoethylene-2,2-dithiolate] and Cu[Zn(ecda) 2 ] that have been synthesized and characterized by elemental analysis, solution conductivity and magnetic susceptibility measurements and relevant spectroscopies [IR, UV-VIS, EPR, 1 H and 1 3 C NMR] are described. Complete quenching of paramagnetism at room temperature showed presence of strongly antiferromagnetically coupled Cu(II) ions in Cu[Zn(ecda) 2 ]. Considerably low values of magnetic moment and feature of EPR spectra in the remaining heterobimetallics containing VO(IV), Ni(II) and Cu(II) showed involvement of some sort of metal-metal interaction in these species. All of the compounds exhibited semiconducting behaviour in the range of 293-393 K with σ r t =10 - 1 2 to 10 - 8 S cm - 1 .