用VSEPR理论判断过渡元素配合物构型探讨

Study on Configuration of Complex for Transition Elements by VSEPR Theory

在分子轨道理论的基础上 ,提出一种应用VSEPR理论判断过渡元素配合物分子构型的方法 ,并对其在八面体场、四面体场中的应用进行了详细的探讨 .结果表明 :在配位数为 4,6,8的配合物中 ,必须将VSEPR理论和其他化学键理论并用 ,才能得到准确结果 .VSEPR理论是化学键理论中的一种近似模型 ,将此理论应用于配合物中 ,是一种新的尝试 ,目的在于应用简单的方法判断复杂的配合物分子构型 .

In this paper,a new approach to judge molecular configuration of complex for transition elements by VSEPR theory is put forward on the basis of molecular orbit theory.Its application to octahedral field and tetrahedral field are introduced in detail.Results indicate that the correct molecular configuration of complex can be obtained by VSEPR theory,but for the complex in which the coordination number is 4,6 and 8 by both VSEPR theory and other chemical bond theory.The VSEPR is simple in use due to approxiate model.It is a new attempt to put the VSEPR theory into use for complex.The aim is to judge molecular (or iron) configuration of complex by simple method.