Enumeration and classification of coronoid hydrocarbons. Part V. Primitive coronoids

Abstract

Some topological properties of primitive coronoids are discussed. A method of generating such systems from the corona hole is described in detail. The results from computer-aided enumerations of primitive coronoids are given for h (the number of hexagons ) up to 25. The results account for 1 075 554 nonisomorphic systems. The distributions into symmetry groups are specified. The forms of all the primitive coronoids for h ≤ 15 are depicted and supplied with K numbers ( Kekulé structure counts ). Finally the average K values and related quantities for the systems under consideration are reported. © 1989.