Two distinct ferroceneyl carboxylate Pb(II) complexes with the same composition prepared by two different synthetic methods: The substitution of precursor and one-pot reaction

摘要

Through substituation reaction, one lead ferroceneyl carboxylate polymer, namely [Pb(μ_2-OOCClH3-C6Fc)2(phen)]_n 1a [Fc = (η~5-C5H5)Fe(η~5-C5H4)] was synthesized from precursor [Pb(μ2-η~2-OOCClH3C6Fc)2-(CH3OH)2]_n 1. However, a mononuclear Pb(II) complex {[Pb(η~2-OOCClH3C5Fc)2(phen)]·(CH3OH)·(H2O)} 2 could be obtained from the traditional one-pot reaction of FcC6H3ClCOONa and Pb(OAc)2 with 1,10-phe-nantholine (phen). The electrochemical studies of 1,1a, 2 and FcC6H3ClCOOH indicate that the half-wave potentials of the ferrocenyl moieties in these complexes are all shifted to positive potential compared with that of FcC6H3ClCOOH.