Effect of basis set superposition error on the electron density of molecular complexes
The effect of basis set superposition error (BSSE) on molecular complexes is analyzed. The BSSE causes artificial delocalizations which modify the first order electron density. The mechanism of this effect is assessed for the hydrogen fluoride dimer with several basis sets. The BSSE-corrected first-...
| Autores: | , , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2000 |
| País: | España |
| Recursos: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:10256/3295 |
| Acesso em linha: | http://hdl.handle.net/10256/3295 |
| Access Level: | acceso abierto |
| Palavra-chave: | Anàlisi d'error (Matemàtica) Funcional de densitat, Teoria del Sistemes hamiltonians Error analysis (Mathematics) Density functionals Hamiltonian systems Electrons -- Distribució Electron distribution |
| Resumo: | The effect of basis set superposition error (BSSE) on molecular complexes is analyzed. The BSSE causes artificial delocalizations which modify the first order electron density. The mechanism of this effect is assessed for the hydrogen fluoride dimer with several basis sets. The BSSE-corrected first-order electron density is obtained using the chemical Hamiltonian approach versions of the Roothaan and Kohn-Sham equations. The corrected densities are compared to uncorrected densities based on the charge density critical points. Contour difference maps between BSSE-corrected and uncorrected densities on the molecular plane are also plotted to gain insight into the effects of BSSE correction on the electron density |
|---|