O. Ohashi, Hisao Hara, Keiko Noji
Apr 1, 1977
Citations
0
Influential Citations
10
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The microwave spectrum of anti-acetaldehyde oxime-d was investigated in the frequency region from 9 to 36 GHz. The rotational transition lines widely split into the A and E species due to the tunneling of the methyl group through the low potential barrier hindering the internal rotation. The transition lines belonging to the A species were fitted to the rigid rotor Hamiltonian, and the following effective rotational constants in MHz were obtained: AA=17250, BA=6284.33, and CA=4704.96. All the observed transition frequencies were fitted to the Hamiltonian containing perturbation terms to the fourth order in order to obtain the internal-rotation parameters using the principal axis method. The potential barrier, V3, hindering the internal rotation was determined to be 373 cal mol−1. The dipole moment was determined to be 0.828 D from the Stark effect of the transitions belonging to the A species.