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A novel topological index W F is defined by the matrices X,W and L as W F=XWL.The topological index WF based on the distance-related matrix of molecular graphs is used to code the structural environment of each atom-type in a molecular graph.Good QSPR models have been obtained for standard formation enthalpy of methyl halides.The result indicates that the idea of using multiple matrices to define the distance-related matrix topological index is valid.
A novel topological index WF is defined by the matrices X, W and L as WF = XWL. The topological index WF based on the distance-related matrix of molecular graphs is used to code the structural environment of each atom-type in a molecular graph .Good QSPR models have been obtained for standard formation enthalpy of methyl halides. The result indicates that the idea of using multiple matrices to define the distance-related matrix topological index is valid.