The calculation of second-order molecular properties at the CI level of accuracy. The magnetisability of LiH
β Scribed by G.T. Daborn; N.C. Handy
- Book ID
- 103021649
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 606 KB
- Volume
- 81
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The perturbation theory approach to the calculation of secondarder molecular properties is amended for the case when the perturbation is a magnetic field. It is therefore possible to calculate rehably the CI contrl%utions to molecular magnetisabilities and large basis results are presented for LIH. 'i AxII ~xkp b) Ax: (1) Ax! (2) -
π SIMILAR VOLUMES
We present the theory of the electron propagator perturbed by an external electric field and show how it can be used to calculate a variety of one-electron linear response properties that are accurate through second order in electron correlation. Some illustrative calculations are discussed.
Cubic and quartic internal coordinate force constants are often obtained by a least-squares fit of a set of ab initio energies to an expansion of the potential energy. The reliability of such a procedure can now be determined, since analytic Cartesian cubic force constants are available which, when