Collect. Czech. Chem. Commun.
1985, 50, 995-1000
https://doi.org/10.1135/cccc19850995
Study of potential curves by UHF-type methods. Linearized coupled cluster methods with double substitution
Viliam Klimo and Jozef Tiňo
Polymer Institute, Centre of Chemical Research, Slovak Academy of Sciences, 842 36 Bratislava
Abstract
The potential energy curves have ben calculated for LiH, Li2, and N2 molecules by means of the L-CCD method (Linearized Coupled Cluster Method with Double Substitutions) based on the UHF and RHF reference functions. With each of the molecules, peculiarities are discussed of the description of the curves by the UHF-type methods on the basis of comparison with the full CI or experimental curves. The L-CCD(UHF) method gives a qualitatively correct course within the whole range of internuclear distances.
