Conformational Effects on Optical Rotation. 3-Substituted 1-Butenes
โ Scribed by Wiberg, Kenneth B.; Vaccaro, Patrick H.; Cheeseman, James R.
- Book ID
- 127234187
- Publisher
- American Chemical Society
- Year
- 2003
- Tongue
- English
- Weight
- 260 KB
- Volume
- 125
- Category
- Article
- ISSN
- 0002-7863
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๐ SIMILAR VOLUMES
## Abstract The vaporโphase optical rotation (or circular birefringence) of (__S__)โ1,2โepoxybutane, (__S__)โepichlorohydrin, and (__S__)โepifluorohydrin has been measured at the nonresonant excitation wavelengths of 355 nm and 633 nm by means of Cavity RingโDown Polarimetry (CRDP). Complementary s
## Abstract The calculated result obtained with MM2(87) for the rotation of the isopropyl group in 3โmethylโ1โbutene is not in agreement with experimental data. In order to reparametrize the C~__sp__~2โC~__sp__~3โC~__sp__~โC~__sp__~3 torsional angle, 3โmethylโ1โbutene and 1โbutene have been studied
The conformati ons and the rotational barriers of the 2-substituted 1,3-diphenylallylanions lb-g (Tab.2) have been determined. Increasing size of the substituents leads tomore exo,endo-and endo,endo-conformers at the cost of the exo,exo-species. This trend is connected with decreasing AG\*-values of