Orthogonal Linear Combinations of Gaussian Type Orbitals

Details Orthogonal Linear Combinations of Gaussian Type Orbitals Orthogonal Linear Combinations of Gaussian Type Orbitals

1999-07-30

arxiv.org/abs/physics/9907051v4

Int. J. Quant. Chem. 90 (2002) 227-243

Physics

Chemical Physics

13 pages, no figures, REVTeX4. Corrected eqs. (23) and (C4)

Scientific paper

10.1002/qua.10085

The set of Gaussian Type Orbitals g(n1,n2,n3) of order (n+1)(n+2)/2, of common n=n1+n2+n3<=7, common center and exponential, is customized to define a set of 2n+1 linear combinations t(n,m) (-n<=m<=n) such that each t(n,m) depends on the azimuthal and polar angle of the spherical coordinate system like the real or imaginary part of the associated Spherical Harmonic. (Results cover both Hermite and Cartesian Gaussian Type Orbitals.) Overlap, kinetic energy and Coulomb energy matrix elements are presented for generalized basis functions of the type r^s*t(n,m) (s=0,2,4,...). In addition, normalization integrals int |g(n1,n2,n3)|d^3r are calculated up to n=7 and normalization integrals int |r^s*t(n,m)|d^3r up to n=5.

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