Two series of the organometallic salts, (M'Cp2)[M(mnt)2] and [FeCp(Tol)]n[M(mnt)2][M=Ni, Pd, Co, Cu or Zn; M'=Fe or Cp=cyclopentadienyl; Tol=Toluene; mnt=maleonitriledithiolate; n=1 or 2).were synthesized .their structure was confirmed by elemental analysis, IR and NMR. the singl4e crystal structure of [FeCp(Tol)]2[Ni(mnt)2]was determined by X-ray diffraction. Mossbauer and ESR spectra indecated that (FeCp2)[Ni(mnt)2] was a mixed valence compound and the mechanism of its formation reaction was proposed. The solid state conductivity of all the compounds and the magnetic property of some compounds were measured.

Key words: MERCAPTAN, REACTION MECHANISM, MAGNETISM, ELECTRICAL CONDUCTIVITY, STRUCTURE, PHYSICAL PROPERTIES