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Structure/formula informatics of isomeric sets of fluoranthenoid/fluorenoid and indacenoid hydrocarbons

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Abstract

The systematics of fluoranthenoid/fluorenoid and indacenoid hydrocarbons is studied. Successive circumscribing a set of isomeric structures that result in a constant number of isomers at each circumscribing step gives what is called a constant-isomer series. Constant-isomer series have a repetitive isomer number pattern in which those series with the same isomer number have a one-to-one matching in topology among their membership. The general formulas of the matching constant-isomer sets of indacenoids are reproduced by \({{\rm C}_{{{4p}^{2}}{+1}}{\rm H}_{4p+1}}\) and \({{\rm C}_{{{4p}^{2}}{+4p+3}}{\rm H}_{4p+3}}\), respectively, by successively inputting p  =  1, 2, 3, . . ., and the general formula for the unique indacenoid constant-isomers is reproduced by \({{\rm C}_{{p^{2}}{+3p+4}}{\rm H}_{2p+4}}\). Similar general formulas for the fluoranthenoid/fluorenoid hydrocarbon constant-isomer series are also presented.

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Correspondence to Jerry Ray Dias.

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Dias, J.R. Structure/formula informatics of isomeric sets of fluoranthenoid/fluorenoid and indacenoid hydrocarbons. J Math Chem 48, 313–329 (2010). https://doi.org/10.1007/s10910-010-9671-9

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