Zhang-Zhang Polynomials of Regular 5-tier Benzenoid Strips

Abstract

Formal derivations of closed-form expressions for Clar covering polynomials (aka Zhang Zhang polynomials or ZZ polynomials) of twelve classes of regular 5-tier benzenoid strips are presented. The derived formulas, together with the results reported previously in the literature, complete the full collection of ZZ polynomial formulas for the regular 5-tier benzenoid strips.