Ab initio calculation of the X /sup 1/. sigma. /sup +/ state of CsH
Relativistic effective core potential (RECP) and nonrelativistic all electron (NRAE) calculations are reported for the X /sup 1/..sigma../sup +/ state of CsH. The calculations are based on GVB plus single and double excitation CI wave functions with the Cs(5s, 5p) as well as the two valence electrons correlated. The bonding in CsH is found to involve a Cs(6s)--H(1s) bond but with a significant ionic (Cs/sup +/H/sup -/) component. Correlating the Cs(5s, 5p) electrons leads to a significant bond shortening effect (approx.0.15a/sub 0/). This effect is attributed to a contraction of the Cs(6s) orbital and a shift toward higher energy of the Cs/sup +/H/sup -/ asymptote upon correlating the 5s, 5p shell. Bond shortening due to relativistic contraction of the Cs(6s) is only approx.0.05a/sub 0/ in agreement with the small amount of Cs(6s) character in the ionic bond orbital. The NRAE and RECP potential curves are very similar except for the shorter R/sub e/ for the RECP case (due to relativistic bond contraction).
- Research Organization:
- Analatom Inc., Sunnyvale, California 94086
- OSTI ID:
- 6301642
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 78:11; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cesium Platinide Hydride 4Cs 2 Pt-CsH: An Intermetallic Double Salt Featuring Metal Anions
Relating the 4s{sigma}{sup -1} inner-valence photoelectron spectrum of HBr with the Br 3d{sup -1}5l{lambda} resonant Auger spectra: An approach to the assignments
Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
CESIUM COMPOUNDS
CESIUM HYDRIDES
CHEMICAL BONDS
CORRELATIONS
ELECTRON CORRELATION
ELECTRONIC STRUCTURE
FIELD THEORIES
GENERAL RELATIVITY THEORY
HYDRIDES
HYDROGEN COMPOUNDS
RELATIVITY THEORY