【摘要】 基于分子距离与邻接矩阵提出了一种新颖表征有机物结构特征的分子拓扑指数Y。对饱和烷烃（n≤9，共74个分子）的计算结果及其与物性相关研究表明，与现有某些拓扑指数比较具有良好的结构选择性（简并度较小）和QSPR规律性。更多还原

【Abstract】 A novel topological index called Y-index was developed based simutaneously on the distance (D) and adjaenct (A) matrices for a molecular.The topological index Y was of good resolution and recognition for various molecular structures and of good relation-ship with the physical properties, such as boiling polnts BP, of 74 alkanes. The results show that the Y-index was applicable to QSPR/QSAR studies with good selection and high relation.更多还原