双吡唑烷ⅥB金属羰基配合物的取代基效应与电化学性质研究

Studies on the Substituent Effect and Electrochemical Behavior of ⅥB Metal Carbonyl Complexes Containing Bis(pyrazol-1-yl)alkanes

对双吡唑烷 B金属羰基配合物的电化学特性进行了系统研究 .结果表明 ,吡唑环上的取代基极大的影响双吡唑烷 B金属羰基配合物金属中心的峰电位 E1/ 2 .给电子取代基增强配体的配位能力且使金属中心的 E1/ 2 减小 ,而吸电子取代基减弱配体的配位能力使金属中心的 E1/ 2 增大 .

The cyclic voltammetric behavior of ⅥB carbonyl complexes containing bis(pyrazol 1 yl)alkanes has been investigated. It was found that the redox potentials(E 1/2) of metal centers remarkably relate to the ability of electron donating of ligands. Metal centers with electron donating groups on the pyrazolyl rings are easier to be oxidized than those containing electron withdrawing groups.