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本文利用拓扑指数ｘｚ研究饱和烷烃物理化学性质，对含２-９个碳原子饱和烷烃共７４个分子的计算结果表明，ｘｚ指数不仅有较好的结构选择性，而且有较好的性质相关性。
In this paper, the physicochemical properties of saturated alkanes are investigated by the topological index xz. The calculation of 74 molecules with saturated alkanes of 2 to 9 carbon atoms shows that the xz index not only has good structural selectivity, but also has good property correlation .