Em-opPen dc CaIcrtl Alomiqur cl Mol&rrIaire. CECAM. Bt?fin~~~d 506. 91 Cantpus d'Orsay. Fv-ance Receivcrl 9 October 1970 The'concept of constructing moleculnr wivcfunctions using basis sets whose members consist of both Slater-type and gaussian-type atomic orbit:ds is ex:lmined through pilot SCF cal
On the use of minimal basis sets of gaussian-type orbitals
โ Scribed by R.A. Suthers; J.W. Linnett
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 499 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
First ionization potentials and electron affinities have been calculated for the atoms hydrogen to neon using singk, double and triple pussian functions. The results help to explain why those. simple ab initio methods which imptoy minimal basis sets of single gaussian-type orbiti experience difficulties when applied to molecules containing[onepairs of electrons.
๐ SIMILAR VOLUMES
Information theoretic techniques have been applied for the refinement of Gaussian basis sets. A refined distribution has been obtained by cross-entropy minimization starting from a near Hartree-Fock quality density distribution. For this purpose, the Kullback-Leibler cross-entropy, S[&,] =jp(r) In [
In this paper we will consider some of the methods involved in carrying out density functional calculations within the framework of localised basis sets, specifically those of Gaussian type orbitals. Particular emphasis is placed on the methods used in the AIMPRO (Ab Initio Modelling PROgram) code,
## Abstract We present three Slaterโtype atomic orbital (STO) valence basis (VB) sets for the first and second row atoms, referred to as the VB1, VB2, and VB3 bases. The smallest VB1 basis has the following structure: [3, 1] for the H and He atoms, [5, 1] for Li and Be, and [5, 3, 1] for the B to N
## Abstract A new scheme for deriving localized basis orbitals (LBOs) and for obtaining integral transformations from the basis orbitals (BOs) to the LBOs has been introduced. The scheme was tested at the __ab initio__ HartreeโFock level using the STOโ3G basis set. It has been revealed that it prov