A Mo/ller–Plesset study of the electron affinities of the diatomic hydrides XH (X=Li, B, Be, C, N, O)
- 15 March 1986
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 84 (6), 3224-3229
- https://doi.org/10.1063/1.450832
Abstract
Electron affinities for LiH, BeH, BH, CH, NH, and OH are computed at the MP2, MP3, and full MP4(SDTQ) order of perturbation theory employing the basis sets 6‐31G(d,p), 6‐311G(d,p), 6‐311++G(d,p), and 6‐311++G(3df,3pd), using geometries optimized at MP2/6‐31G(d,p). At the MP4(SDTQ)/6‐311++G(3df,3pd)//MP2/6‐31G(d,p) level including zero‐point corrections, electron affinities are predicted with a maximum deviation of 0.2 eV from experiment. At the same level of theory, dissociation energies of the anions are computed to an accuracy of 0.11 eV. The energy results reported here are in most cases in better agreement with experiments than previous theoretical results. Vibrational frequencies and atomic distances are determined at the MP2/6‐31G(d,p) level indicating longer bonds and lower frequencies as a consequence of electron attachment to the neutral hydrides.Keywords
This publication has 40 references indexed in Scilit:
- Molecular orbital study of the complexes (AHn)2H+ formed from ammonia, water, hydrogen fluoride, phosphine, hydrogen sulfide, and hydrogen chlorideThe Journal of Physical Chemistry, 1985
- OH− and OD− threshold photodetachmentThe Journal of Chemical Physics, 1982
- Photodetachment of the azide anion in the gas phase. Electron affinity of the azide radicalJournal of the American Chemical Society, 1981
- MCSCF pseudopotential calculations for the alkali hydrides and their anionsThe Journal of Chemical Physics, 1981
- Theoretical Studies of Negative Molecular IonsAnnual Review of Physical Chemistry, 1977
- Correlation energy difference models for first and second row hydridesThe Journal of Chemical Physics, 1976
- Theoretical predictions of stable negative ions: HF−, LiH−, NaH−The Journal of Chemical Physics, 1975
- Theoretical studies of molecular ions. The ionization potential and electron affinity of BHThe Journal of Chemical Physics, 1975
- The electron affinities of the diatomic hydrides CH, NH, SiH and PHProceedings of the Physical Society, 1967
- Note on an Approximation Treatment for Many-Electron SystemsPhysical Review B, 1934