6-31G* basis set for third-row atoms

Vitaly A. Rassolov*, Mark A. Ratner, John A. Pople, Paul C. Redfern, Larry A. Curtiss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1908 Scopus citations


Medium basis sets based upon contractions of Gaussian primitives are developed for the third-row elements Ga through Kr. The basis functions generalize the 6-31G and 6-31G* sets commonly used for atoms up to Ar. A reexamination of the 6-31G* basis set for K and Ca developed earlier leads to the inclusion of 3d orbitals into the valence space for these atoms. Now the 6-31G basis for the whole third-row K through Kr has six primitive Gaussians for 1s, 2s, 2p, 3s, and 3p orbitals, and a split-valence pair of three and one primitives for valence orbitals, which are 4s, 4p, and 3d. The nature of the polarization functions for third-row atoms is reexamined as well. The polarization functions for K, Ca, and Ga through Kr are single set of Cartesian d-type primitives. The polarization functions for transition metals are defined to be a single 7f set of uncontracted primitives. Comparison with experimental data shows good agreement with bond lengths and angles for representative vapor-phase metal complexes.

Original languageEnglish (US)
Pages (from-to)976-984
Number of pages9
JournalJournal of computational chemistry
Issue number9
StatePublished - 2001


  • Ab initio
  • Basis sets
  • Hartree-Fock
  • Third-row elements

ASJC Scopus subject areas

  • General Chemistry
  • Computational Mathematics


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