#### Croatica Chemica Acta, Vol. 83 No. 4, 2010.

Original scientific paper

**Omega Polynomial in a Combined Coronene-Sumanene Covering**

Mahboubeh Saheli
; Departmant of Mathematics, Faculty of Science, University of Kashan, Kashan 87317-51167, I.R. Iran

Mahdieh Neamati
; Departmant of Mathematics, Faculty of Science, University of Kashan, Kashan 87317-51167, I.R. Iran

Aleksandar Ilić
; Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia

Mircea V. Diudea
; Faculty of Chemistry and Chemical Engineering, "Babes-Bolyai" University, 400028 Cluj, Romania

###### Abstract

A new graphene pattern, called CorSu, was designed by combining the patterns of coronene [6:66]

and sumanene [6:(5,6)3]. The energy of some small fragments of this lattice, functionalized by groups

containing oxygen, carbon, nitrogen and phosphorus, was evaluated at the level of semiempirical method

PM3. The topology of the network is described in terms of Omega counting polynomial. Close formulas

for calculating the Omega polynomial and the Cluj-Ilmenau index derived from this polynomial are given.

###### Keywords

counting polynomial; lattice; CI index; coronene; sumanene

###### Hrčak ID:

62643

###### URI

###### Publication date:

1.12.2010.

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