Conformation of 4-methylcyclohexanone by microwave spectroscopy
Abstract
The microwave spectrum of 4-methylcyclohexanone has been observed in the frequency region from 18.0 to 26.5 GHz. Both a-type and c-type transitions in the ground state and a-type transitions in four excited states have been assigned. The ground state rotational constants are determined to be A = 4034.39 ± 0.06 MHz, B = 1455.46 ± 0.01 MHz, and C = 1174.06 ± 0.01 MHz. From these data, it is shown that the most stable conformer exists in the chair form with the methyl group in the equatorial position.
- Publication:
-
Journal of Molecular Spectroscopy
- Pub Date:
- November 1983
- DOI:
- 10.1016/0022-2852(83)90225-4
- Bibcode:
- 1983JMoSp.102...33L