The optical rotatory strengths for the first four electronic transitions in fluoro-and methyl-cyclopropanone have been calculated by a large-scale multi-reference CI (MR-Cl) wavefunction. The fluorine effect of the "octant rule" for the first absorption band of the carbonyl chromophore has been conf
Ab initio CI study of the optical rotatory strengths of HSSH
โ Scribed by Tae-Kyu Ha; W. Cencek
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 382 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The optical rotatory strengths for the four lower-lying electronic transitions of dihydrogen disuhide (HSSH) have been studied by a large ab initio multi-reference CI (MR CI) calculation, The dependence of the optical property on the rotation with respect to the twofold axis of symmetry has been examined. For the two lowest-lying transitions, the empirical C:-rule and the "quadrant rule" may be confirmed. However, for dihedral angles near 90ยฐ. a significant net contribution of rotatory strengths is calculated, whereas the two excited states are nearly degenerate.
๐ SIMILAR VOLUMES
Ab initio MRD CI calculations using an extended basis set have been performed on the FHBr-ion in order to determine its electronic structure and hydrogen bond energy. The equilibirum F-H/H...Br distances are predicted to be 1.73913.344, 1.777/ 3.073 and I .786/3.064 bohr by the SCF, MRD CI and estim
Minimal basis set (STO4G) ab initio calculations in the randomphase approximation (RPA) are presented for the ordinary and rotatory intensities of the low-Iying electronic transitions of twisted cis-butadiene. and planar trams-butadiene. The formally equivalent intensities agree much better in the R