Compact Valence Sequences for Molecules with Single, Double and Triple Covalent Bonds. II. Graphs with Non-trivial Cycles*


Molecular graphs able to model covalent multiple bonds are called plerographs. For such graphs, with single, double and triple edges, compact degree sequences (n1, n2, n3, n4), where ni, i = 1, 2, 3, 4 denote the number of vertices of degree i, are defined. Investigations are extended to necessary and sufficient conditions on (n1, n2, n3, n4) for the… (More)


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