SERIES OF FLUORENOID FLUORANTHENOID HYDROCARBONS HAVING A CONSTANT NUMBER OF ISOMERS

There are series of C(n)H(s) formulas for fluorenoid/fluoranthenoid hydrocarbons having equal numbers of isomers. The isomer numbers of these constant-isomer series are presented for the first time. These results were obtained by the use of the aufbau principle, excised internal structure concept, and a hexagonal-to-pentagonal ring contraction process on previously enumerated benzenoid isomers. The formula periodic table for fluorenoid/fluoranthenoid hydrocarbons is the framework which governs the application of these algorithms. Two classes of series exist; one is unique and the other forms a pairwise topologically equivalent class.