The maximization of the exchange interaction between the canonical Hartree-Fock virtual and occupied orbitals leads to a transformed set of virtual orbitals which are well suited as one-electron functions for CI calculations. The procedure, generally known for a long time is seldom applied, despite
A systematic CI procedure with modified virtual orbitals
✍ Scribed by Ian L. Cooper; Christopher N. M. Pounder
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 595 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0192-8651
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The use of modified virtual orbitals is studied in a systematic conventional CI procedure which offers considerable potential in regard to convergence and extension to larger systems. The method is applied to the HCN molecule by using 37 basis functions, and analysis of energy expectation values, together with the one‐electron density, yields some insight into the physical content of CI wavefunctions.
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