The use of orthogonalized atomic orbitals in valence bond type wavefunctions ts critically examined. By analyzing a test case m detatl, it is shown that the simple interpretation of such wavefunctions in terms ofweighted chemical formulae can be misleading.
Limits on the localized interpretation of molecular orbital wavefunctions
โ Scribed by R. Daudel; M.E. Stephens; E. Kapuy; C. Kozmutza
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 540 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
A new measure of orbital localiwbility is proposed. The actual improvement in classical electrostatic interpretations of elcctronie energy contributions on localization of CHg, NH3, H20, NF and NC LCAO wavefunctions is computed to be small. Substantial vttlence LMO spztiat overlappiq remains. A Borg-standiu~ goal of quantum chemistry has been the estabIishing of a theoretically rigorous quantum analogtie of the intuitive Lewis [I ] descr$tion of molecular electronic structure f2,3]. That a modet of s~tf@y relatively well-localized electron pairs may not be compatible with the properties of oneparticle SchrGdinger coordinate-space representation
.'
๐ SIMILAR VOLUMES
The purpose of this work is to make the coupled cluster (CC) energy stationary with respect to molecular-orbital (MO) variations in the reference configuration. To achieve this, we have used the Zvector, the solution of a set of perturbation-independent CPHF-like equations, to rotate the MOs. A new
## Abstract We present a derivation of the semiempirical variational finite localized molecular orbital (VFL) approximation, which was introduced by Anikin et al. (J Chem Phys 2004, 121, 1266). On the basis of VFL approximation, we developed the novel semiempirical (quantum mechanical) QM/QM method