| Autor: |
Zushi, Shoji, Kodama, Yoshio, Nishihata, Ken, Umemura, Koshiro, Nishio, Motohiro, Uzawa, Jun, Hirota, Minoru |
| Zdroj: |
Bulletin of the Chemical Society of Japan; December 1980, Vol. 53 Issue: 12 p3631-3640, 10p |
| Abstrakt: |
The conformations have been studied by means of NMR spectroscopy, largely by the computer simulation of the lanthanoid-induced shifts, for a series of aliphatic carbonyl compounds with the following structures: CH3CH(C6H5)CO–R; R=H, CH3, C2H5, i-C3H7, and t-C4H9. It has been suggested that two rotamers are important in the conformational equilibria of these ketones, in which the R–C–C–C6H5dihedral angle is ca.30° and ca.90°. The relative stability of the above two rotamers has been found to depend on the nature of the alkyl group, R. The results have been discussed in light of the possible weak attractive forces, the CH/π and CH/n interactions. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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