## Abstract Energy optimization (Eo) and property optimization (PO) were performed on the H~2~O molecule. A definition of the βoptimalityβ ΞΊ, a dimensionless quantity of the form has been proposed where Ο~i~ is a weighting factor, γΗγ~i~ is the computed observable, and __O__~i~ is the correspondin
Study of the quality of Gaussian basis sets for carbon and silicon: Calculations on methane and silane
β Scribed by R. Daudel; R. A. Poirier; J. D. Goddard; I. G. Csizmadia
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 417 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0020-7608
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
A number of Gaussian basis sets for carbon and silicon have been examined in terms of the oneβelectron properties of methane and silane. The convergence of the properties to their limiting values is not monotonic but, in general, a representation that involves five Gaussian functions per occupied atomic orbital on the heavy atom is sufficient to closely approach the limits. A relationship between the sizes and partitioned electronic energies is shown to hold to a good approximation for the Boys spatially localized molecular orbitals employed in this study.
π SIMILAR VOLUMES
Ab initio MO SCF calculations using gaussian basis functions have been performed to study the protonation of carbon monoxide and the nitrogen molecule. The geometry of the protonated species has been investigated in some detail. The calculated pratan affinities are 118 kcal/mole for N3 and 13'7 kcal
## Abstract Several βcoreβdeficientβ small Gaussian basis sets were constructed and analyzed in terms of the balance requirements of functions that contribute predominantly to the core. Variations in the conformational energy barriers and geometrical parameters for ammonia and ethane, calculated wi
The performance of numerical basis sets in relation to Gaussian basis sets is examined, by studying 20 small sulfur-containing molecules. The results of geometry optimization calculations are reported for each molecule using both density functional and Hartee-Fock methods. In comparison with experim
## Abstract Uniform quality basis sets (UQβNG; __N__=3, 4, 5), with __s__ = __p__ and __s__ β __p__, and a 6β31 __G__^\*^ basis set have been optimized for the sulfur atom. These uniform quality basis sets in their uncontracted and contracted forms were used, together with other basis sets reported