BENZENOID SERIES HAVING A CONSTANT NUMBER OF ISOMERS .2. TOPOLOGICAL CHARACTERISTICS OF STRICTLY PERICONDENSED CONSTANT-ISOMER BENZENOID SERIES

Our previous constant-isomer series are supplemented and extended. Two distinct classes of constant-isomer benzenoid groups have been identified. One class is topologically unique and the other forms a pairwise topologically equivalent class. An extention to our previous algorithm which led to these additional results is presented. Circulenes, benzenoid-related molecular systems having holes, have no constant-isomer series. © 1990, American Chemical Society. All rights reserved.