Calculations of PAH anions: When are diffuse functions necessary?

Citation:

Treitel, N. ; Shenhar, R. ; Aprahamian, I. ; Sheradsky, T. ; Rabinovitz, M. Calculations of PAH anions: When are diffuse functions necessary?. Physical Chemistry Chemical Physics 2004, 6 1113-1121.

Date Published:

MAR 21

Abstract:

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 H-1- and C-13-NMR shifts undoubtedly requires the use of these functions.
Last updated on 12/31/2018