Study of formation of complex Salts, [Co(o-phen)3][Zn(ecda)2] and [Ni(bipy)3][Cd(ecda)2] Via Ligand Exchange Reaction

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Complex salts  [Co(o-phen)3][Zn(ecda)2] and [Ni(bipy)3][Cd(ecda)2] have resulted by interaction of [Zn(o-phen)3]2+ and [Co(ecda)2]2- ion; [Cd(bipy)3]2+ cation and [Ni(ecda)2]2- dianion, where ecda=1-ethoxycarbonyl-1-cyanoethylene-2,2-dithiolate.Magnetic susceptibility measurement of the complex [Co(o-phen)3][Zn(ecda)2] suggest presence of octahedral cobalt II ion. Presence of octahedral environment around Ni II in complex, [Ni(bipy)3][Cd(ecda)2] has been supported by electronic spectral data and magnetic susceptibility measurement. IR spectra show presence of prominent groups and coordination of metal ions with ligand. Molar conductance measurements show extensive ion pairing in solution. Formation of these complexes take place presumably via ligand exchange reaction occurring during course of their formation.

Complex salts; Dithiolate; Ecda