Average dipole polarizabilities from the unsold approximation and ab initio data

Maurice G. Sylvain, I. G. Csizmadia

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8 Citations (Scopus)


An approximate static dipole polarizability equation is developed on the basis of the Unsold approximation, and is cast in closed shell LCAO MO SCF formalism. A brief study is made of the use of Koopmans' theorem as a means of obtaining an average ionization energy, necessary in the polarizability equation presented. Average polarizabilities for the systems He, Ne, H2, HF, H2O, NH2, CH4, HCN, N2, C2H2, C2H4, C2H6, C6H6, and C6H5F are calculated from the dipole polarizability expression developed using a small 4-31G basis set level. Results show good agreement with experimental data.

Original languageEnglish
Pages (from-to)575-582
Number of pages8
JournalChemical Physics Letters
Issue number6
Publication statusPublished - May 22 1987


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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