EDF2: A density functional for predicting molecular vibrational frequencies

Ching Yeh Lin, Michael W. George, Peter M.W. Gill

Research output: Journal PublicationArticlepeer-review

123 Citations (Scopus)

Abstract

The majority of calculations of molecular vibrational spectra are based on the harmonic approximation but are compared (usually after empirical scaling) with experimental anharmonic frequencies. Any agreement that is observed in such cases must be attributable to fortuitous cancellation of errors and it would certainly be preferable to develop a more rigorous computational approach. In this paper, we introduce a new density functional model (EDF2) that is explicitly designed to yield accurate harmonic frequencies, and we present numerical results for a wide variety of molecules whose experimental harmonic frequencies are known. The EDF2 model is found to be significantly more accurate than other DFT models and competitive with the computationally expensive CCSD(T) method.

Original languageEnglish
Pages (from-to)365-370
Number of pages6
JournalAustralian Journal of Chemistry
Volume57
Issue number4
DOIs
Publication statusPublished - 2004
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)

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