An inverse perturbation calculation using effective normal coordinates is performed, up to second order, to determine the vibrational potential of \({ }^{12} \mathrm{C}^{16} \mathrm{O}_{2}\) from experimental energy levels. Such a potential should be closer to the true potential than if the standard
The calculation of the normal coordinates of molecular crystals using pairwise potential functions
โ Scribed by G. Taddei; H. Bonadeo; S. Califano
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 364 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
A brief outline of a method for the calculation of the normal coordinates of mo1ecul.a.r crystals in the entire BrilloGn zone j! presented. Some results on .the lattice frequencies of crystalline benzene and naphthalene, cak _...' culated using pair potential functions, are presented as ekmples. .-..', .' -In re&tit years a great deal of interest has been de-_ ^..,' voted to -the .studi of the dynamics of molecular crys-.. t,aIs..Va;ious papers have been published on the cal-'CH.EMICAL PHYSICS LETTERS
๐ SIMILAR VOLUMES
The performance of different density functional methods in the calculation of molecular electrostatic potentials and Fukui funcliions, i.e. two reactivity indices based on the electron density, is investigated. It turns out, as a whole, that the exact exchange functionals B3LYP and B3PW91 yield resu