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7631367 
Journal Article 
Number and forms of tetracyclic polygonal pyrene isomers 
Cyvin, SJ; Brunvoll, J; Cyvin, BN; , 
1995 
1 
Match (Mülheim an der Ruhr, Germany)
ISSN: 0340-6253 
UNIV BAYREUTH, DEPT MATHEMATICS 
BAYREUTH 
59-70 
WOS:A1995XM47400005 
Polygonal systems (P) correspond to polycyclic conjugated hydrocarbons. The (cyclic polygonal) pyrene isomers (C16H10) belonging to the class P are enumerated. The resulting 965 isomers are specified in terms of polygon sizes within the five subclasses: n(i) = 0 (branched and unbranched), n(i) = 1, 2, 3. Here n(i) is used to denote the number of internal vertices.