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On the use of minimal basis sets of gaussian-type orbitals

โœ 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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โœฆ 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.


๐Ÿ“œ SIMILAR VOLUMES


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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 [

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## Abstract We present three Slaterโ€type 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

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## 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__ Hartreeโ€Fock level using the STOโ€3G basis set. It has been revealed that it prov