Barriers to internal rotation in histamine and 4-methyl histamine
β Scribed by W.G. Richards; Jane Hammond; D.G. Aschman
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 132 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0022-5193
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract The electronic states and barriers to internal rotation in allene (**1a**), 1βsilaallene (**2a**), and 2βsilaallene (**3a**) are investigated computationally using __ab__β__initio__ molecular orbital methods. Planar geometries with twoβ, threeβ, and fourβΟβelectron configurations have b
## Abstract Activation parameters for the hindered rotation in some dimethylamino substituted azoles are reported and the effects of various ring systems and substituents on the barrier are discussed. Possible errors in Ξ__H__β and Ξ__S__β are investigated.
The microwave rotational spectra of 2,4-difluorotoluene (C 6 H 3 CH 3 F 2 ) have been investigated in the ground and first excited torsional state in the frequency ranges 12.4-26.0 and 32.0-37.0 GHz. The true rotational constants for the ground state were determined to be A r Γ 3070.287 MHz, B r Γ 1