TOPOLOGICAL ORGANIC-CHEMISTRY .7. GRAPH-THEORY AND MOLECULAR TOPOLOGICAL INDEXES OF UNSATURATED AND AROMATIC-HYDROCARBONS

Adjacency, distance, and degree matrices of representative unsaturated and aromatic hydrocarbons acquired from the appropriate graphs were u sed to generate molecular topological indices. Invariant indices were obtained from the following distance matrix calculations: the sum of t he elements of the product of the degree vector and the distance matri x; the determinant and principal eigenvalue of the distance matrix; th e permanent, the product of the row sums, and the short and long hafni ans of the distance matrix. Descriptors were also derived from three a djacency-plus-distance matrix calculations: the sum of the elements of the product of the degree vector and the adjacency-plus-distance matr ices; the determinant and principal eigenvalue of the sum of the two m atrices.