新型四齿膦配体合成及其与过渡金属配位反应研究

Synthesis of new tetradentate phosphine ligand and study of its coordination reaction with transition metals

通过多步膦烷基化反应和还原脱苄基反应,成功合成了一种具有双碳链连接体的新型四齿膦配体,该配体中含有一个1,4-二磷环己烷的结构以及两个—P(H)_(2).研究了配体合成过程中含磷环的顺反异构现象,以及该配体与Ni^(2+)的配位反应.结果表明,该膦配体能够很好地与Ni^(2+)螯合,形成平面四边形配位的配合物Ni{[PH_(2)(CH_(2))_(3)]_(2)P_(2)C_(4)H_(8)}^(2+),使用核磁共振和计算化学等方法对其进行了表征和结构预测.

A new type of tetradentate phosphine ligand containing two carbon-chain linkers is synthesized through multi-step phosphine alkylation reaction and reductive debenzylation reaction.This ligand has a 1,4-diphosphocyclohexane skeleton and two—P(H)_(2).The cis-trans isomerization of the phosphorus-containing ring in its preparation is discussed.The coordination reaction between the ligand and Ni^(2+)is studied.The results show that this tetradentate phosphine ligand can chelate with Ni^(2+)to form a planar quadrilateral coordination complex Ni{[PH_(2)(CH_(2))_(3)]_(2)P_(2)C_(4)H_(8)}^(2+).Nuclear magnetic resonance and computational chemistry methods are used to characterize and predict its structure.