Gaussian-1 theory of molecular energies for second-row compounds
J. Chem. Phys. 93, 2537 (1990); doi:10.1063/1.458892
Issue Date: 15 August 1990
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The Gaussian-1 theoretical procedure is extended and tested on compounds containing second-row atoms (Na–Cl). This is a composite procedure based on ab initio molecular orbital theory, utilizing large basis sets (including diffuse-sp, double-d, and f-polarization functions) and treating electron correlation by Møller–Plesset perturbation theory and by quadratic configuration interaction. Total atomization energies for a set of 24 species agree with accurate experimental data to an accuracy of better than 3 kcal/mol in most cases, SO2 being the notable exception. Similar agreement is achieved for ionization energies, electron affinities, and proton affinities. The method is used to assess experimental data for a number of other compounds having less accurate atomization energies.
The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
| History: | Received 27 March 1990; accepted 24 May 1990 |
| Permalink: |
http://link.aip.org/link/?JCPSA6/93/2537/1 |
KEYWORDS and PACS
GAUSSIAN PROCESSES,
ELECTRON CORRELATION,
PERTURBATION THEORY,
AFFINITY,
IONIZATION POTENTIAL,
DISSOCIATION ENERGY,
SODIUM COMPOUNDS,
MAGNESIUM COMPOUNDS,
ALUMINIUM COMPOUNDS,
SILICON COMPOUNDS,
PHOSPHORUS COMPOUNDS,
SULFUR COMPOUNDS,
CHLORINE COMPOUNDS,
ELECTRONEGATIVITY,
ATOMIZATION,
MOLECULAR ORBITAL METHOD,
AB INITIO CALCULATIONS
- 31.20.Ej
Electronic structure of atoms and molecules: theory Specific calculations and results Ab initio MO calculations - 31.20.Tz
Electronic structure of atoms and molecules: theory Specific calculations and results Electron correlation and CI calculations - 35.20.Gs
Experimentally derived information on atoms and molecules; instrumentation and techniques Molecules Bond strengths, dissociation energies, hydrogen bonding, etc. - 35.20.Vf
Experimentally derived information on atoms and molecules; instrumentation and techniques Molecules Ionization potentials, electron affinities, molecular core binding energy - YEAR: 1990
RELATED DATABASES
PUBLICATION DATA
0021-9606 (print)
1089-7690 (online)
REFERENCES (31)
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