Narumi-Katayama index of phenylenes

Željko Tomović, Ivan Gutman

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)


The Narumi-Katayama topological indes S of a hydrocarbon is the product of vertex degrees of the respective molecular graph. If PH is a phenylene and HS is its hexagonal squeeze, then the respective Narumi-Katayama indices are related as S(PH) = 9h 1 S(HS), where h is the number of hexagons of PH and HS, or as S(PH) = αS(HS)β. where α = 0.078 and β = 1.613.

Original languageEnglish
Pages (from-to)243-247
Number of pages5
JournalJournal of the Serbian Chemical Society
Issue number4
Publication statusPublished - 1 Jan 2001


  • Benzenoid hydrocarbons
  • Hexagonal squeeze
  • Narumi-Katayama topological index
  • Phenylenes


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