New versions of approximately extensive corrected multireference configuration interaction methods

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

In a previous paper (Szalay.P. G.; Bartlett, R. J. J. Chem. Pliys. 1995, 703, 3600) we reviewed all approximately extensive corrected multireference configuration interaction (MR-CI) methods and also proposed a new method , called the multireference averaged quadratic coupled-cluster (MR-AQCC) method. In this paper we continue j the investigation of these methods and propose new variants by including the effect of (a) virtual Orbitals in the EPV (exclusion principle violating) contributions, (b) redundancies due to the MR nature of the reference space. Results of test calculations on water, Be2, Be/H2, ozone and NOi/HF systems are presented which, show that these new methods are able to describe potential energy surfaces very accurately even if small, but qualitatively correct, reference spaces are used.

Original languageEnglish
Pages (from-to)6288-6297
Number of pages10
JournalJournal of physical chemistry
Volume100
Issue number15
DOIs
Publication statusPublished - Jan 1 1996

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'New versions of approximately extensive corrected multireference configuration interaction methods'. Together they form a unique fingerprint.

  • Cite this