The solutions of the matrix representation of the Dirac equation obtained by expansion in Gaussian basis sets are examined. The basis sets consist of non-relativistically energy-optimized Cartesian Gaussians, properly balanced by a basis set constraint, or a generalized modified [a • p] representati
Adaptation of one-electron basis sets to spatial confinements
✍ Scribed by J. Planelles; J. Karwowski; W. Jaskólski
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 157 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0020-7608
No coin nor oath required. For personal study only.
✦ Synopsis
A method that generates out of a given orbital basis set its analog appropriate for describing the effects of a spatial confinement is presented. The method is based on the requirement that the one-particle model spaces for the confined and for the unconfined systems are equivalent in the sense of a criterion derived from the basis-set-generating eigenvalue equations.
📜 SIMILAR VOLUMES
We have applied a discretized version of the generator coordinate Hartree᎐Fock method to generate adapted Gaussian basis sets for atoms Cs Ž . Ž . Zs55 to Lr Z s 103 . Our Hartree᎐Fock total energy results, for all atoms studied, are better than the corresponding Hartree᎐Fock energy results attained
The optimized geometries for the rotamers of propanal, 2-butanone, isobutyraldehyde, methyl isopropyl ketone, and isobutyric acid obtained using the 3-21G and 6-31G\* basis sets are compared, and systematic changes are noted. The relative 6-31G\* energies using the 3-21G and 6-31G\* geometries are g
It is pointed out that my arguments on the effects of contractions of the relativistic basis sets on the total energies are made in the sense of the absolute magnitude while Ishikawa's are made in the sense of the relative magnitude. Hence they do not contradict each other.