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根据文献提出的键参数拓扑指数R,经改进后定义了一个键参数拓扑指数R′,R′=sum from i 1/((1+0.3076(△x_i)~2)·(p_iq_i)~(1/2)),计算结果表明,PR′与MX,MX_2和MO,MS晶格能的对数值In△H_(298)有良好的线性相关性。
According to the key parameter topological index R proposed by the literature, a key parameter topological index R ’is defined after R’ = sum from i 1 / (1 + 0.3076 (Δ x - i) ~ 2) (p_iq_i) ~ (1 / 2)). The calculated results show that there is a good linear correlation between PR ’and the logarithm value InΔH_ (298) of the lattice energy of MX, MX_2 and MO, MS.