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Three new heterobimetallic acetylene complexes CpNiCo (CO)_2 (PPh_3) (PhC_2C_6H_4-R-p) [R =H(2), Br(3), COCH_3(4)] have been synthesized in suitable yield (31-47％) via the reaction of(PhC_2C_6H_4-R-p)CO_2(CO)_5PPh_3 with nickelcene in n-octane. The complex CpNiCo(CO)_3 (Ph_2C_2) (1)has also been obtained in 12％ by the reaction of (Ph_2C_2) Co_2 (CO)_6 with nickelcene. The complexeshave been characterized by elemental analysis, IR and ~1H NMR. Electrochemical study of redoxcouples of these complexes was presented by using cyclic voltammetry on Pt electrodes in acetone.At room temperature, all complexes underwent electrochemically reversible or guasi-reversible one-electron oxidation or reduction to the stable radicals. The radical anions of the complexes couldbe easily detected by ESR method in situ electrolysis in the THF solution. The isotropic parameters,Co= 2.20mT, = 2.052 for the radical anion of complex 1, Co= 2.20 mT, p = 1.42 mT,
Three new heterobimetallic acetylene complexes CpNiCo (CO) _2 (PPh_3) (PhC_2C_6H_4-Rp) [R═H (2), Br (3), COCH_3 (4)] have been synthesized in suitable yield (31-47%) via the The complex CpNiCo (CO) _3 (Ph_2C_2) (1) has also been obtained in 12% by the reaction of (Ph_2C_2) CO_2 (CO) _5PPh_3 with nickel in neoctane The complexes have been characterized by elemental analysis, IR and ~ 1H NMR. Electrochemical study of redoxcouples of these complexes was presented by using cyclic voltammetry on Pt electrodes in acetone. At room temperature, all complexes underwent electrochemically reversible or guasi-reversible The radical anions of the complexes could easily be detected by ESR method in situ electrolysis in the THF solution. The isotropic parameters, Co = 2.20 mT, = 2.052 for the radical anion of complex 1, Co = 2.20 mT, p = 1.42 mT,