化学键共价离子性的判据

THE CRITERION ON THE CORALENT—IONIC CHARACTER OF CHEMICAL BOND

本文从电负性分数差出发,参照化合物的某些重要物理性质,确定了电负性分数差Δx_f=0.34做为离子键和共价键的分界线。参照核四极偶极常数测定所得到的单键共价离子性百分数的估算值,从电负性分数差出发,建立了如下经验公式:p=1.75+9.3Δx_f-7.9Δx_f^2(Δx_f≥0.34)p=0.02+1.4Δx_f+0.07Δx_f^2(Δx_f<0.34)

Being regered to some important properties of compounds,the fractional difference of electronegativity =0.34 is defined as a dividing line between ionic and covalent bond in this paper. From the fractional difference of electronegativity and the evaluated covalent-ionic. character from nuclear quadrupole moment constant,the following experencial formula are also given in this paper: P=0.75+9.3-7.9(≥0.34) p=0.02+1.4+0.07(<0.34)