Ab initio SCF MO energies and pair poiarizabiiities are reported for the pairs Li+/Li+and Cl-/Cl-over the ranges of internuclear separation which are of importance in molten LiCL The shapes of the @CR) curves resemble those of inert gas diatoms. The Cl-/Cl-interaction is predicted to make a rather s
The dipole polarizability of Li−
✍ Scribed by S. Canuto; W. Duch; J. Geertsen; F. Müller-Plathe; J. Oddershede; G.E. Scuseria
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 600 KB
- Volume
- 147
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
We have calculated the lowest excitation energies and the static dipole polarizability of Li-as well as the electron affinity of Li using current quantum-chemical methods, including full CI. We have studied the convergence of the polarizability with the size of the orbital basis set. We find that electron correlation has a dramatic effect on the polarimbility reducing it to roughly half its SCP value. MBPT calculations through fourth-order and perturbative propagator methods give an unsatisfactory description of the electron correlation whereas polarization propagator methods based on a coupled-cluster reference state give a polarizability in fair agreement with the full CI result.
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