Abstract
Helicenes form a subclass of polyhexes and correspond to hydrocarbons of considerable chemical interest. This paper is the first part of a general graph-theoretical treatment of helicenes. The invariants are studied: the relations between them, their possible values, and their upper and lower bounds in helicenes. Extremal helicenes and circular helicenes are useful definitions of subclasses of the systems under consideration. Finally an account of symmetry of helicenes is given.
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On leave from: Department of Mathematics, Xinjiang University, Wulumuqi Xinjiang 830046, People's Republic of China.
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Cyvin, S.J., Fuji, Z., Cyvin, B.N. et al. Theory of helicenic hydrocarbons. Part 1: Invariants and symmetry. Struct Chem 4, 149–160 (1993). https://doi.org/10.1007/BF00679341
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DOI: https://doi.org/10.1007/BF00679341