In this article a procedure for generating starting orbitals for generalized valence bond (GVB) calculations is presented. This is achieved by selecting orbitals which correspond to specific bonds or electron pairs. These orbitals can be identified from the localized molecular orbitals, for both occ
The orthogonality problem in valence bond calculations
β Scribed by Mario Raimondi; Massimo Simonetta
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- English
- Weight
- 149 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0020-7608
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
The energy of the Οβelectron system in benzene has been obtained by means of valence bond calculations using orthogonal and nonorthogonal basis orbitals at different levels of configuration interaction, which shows the influence of the orthogonalization procedures.
π SIMILAR VOLUMES
The "non-orthogontity problem" in vaIenm bond theory is avoided by uing two sets of basis functions, with a bi-orthogor&ty property, together with the method of moments. The basis set Limit is reach4 when all struclures are included, but even trunc=lted sets give good (though not monotonic) converge
## Abstract An integral formula is derived involving a new type of determinantal function which reproduces the effect of the Young operator ΞΈ__NPN__. This result is used to calculate matrix elements between tableau functions of nonβorthogonal orbitals. Matrices which transform this representation i
a) In atomic units (27.2 eV) relative to Be++.
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.
## Abstract An approximate __abβinitio__ valence bond calculation of hydrogen bond energy was carried out and the results are discussed. The total bond energy of a simplified Nο£ΏHβ¦O structure is calculated for various Nο£ΏH and Nβ¦O distances and the potential energy profiles are obtained. The hydrogen