Calculations of PAH anions: When are diffuse functions necessary?

Noach Treitel, Roy Shenhar, Ivan Aprahamian, Tuvia Sheradsky, Mordecai Rabinovitz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


The effect of including vs. excluding diffuse functions while calculating numerous parameters of PAH anions by various calculation methods is discussed. The omission of diffuse functions appears to have a negligible effect while calculating geometry parameters or total energy; thus, acceptable results may be obtained without them. The conclusions for charge density appear to be the same; however, limited results make an unambiguous claim unachievable. Calculating 1H- and 13C-NMR shifts undoubtedly requires the use of these functions.

Original languageAmerican English
Pages (from-to)1113-1121
Number of pages9
JournalPhysical Chemistry Chemical Physics
StatePublished - 2004


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