Accession Number : AD0619912

Title :   THE MICROWAVE SPECTRUM OF METHYL VINYL ETHER,

Corporate Author : COLUMBIA RADIATION LAB NEW YORK

Personal Author(s) : Cahill,Patrick ; Gold,L. Peter

Report Date : 1964

Pagination or Media Count : 12

Abstract : Many of the lines in the microwave spectrum of methyl vinyl ether were assigned to a planar cis molecular conformation, having the following principal moments of inertia, Ia = 27.7382, Ib = 79.1268, and Ic = 103.678 gm sq. cm2. The dipole moment of the cis structure was measured and found to be 0.98 = 0.02 D (mu-a = 0.30 D and mu-b = 0.93 D). Vibrationally excited states of this species were assigned using a microwave double-resonance technique. This method consists of observing the change in one transition while a second transition is saturated with microwave power. Changes occur only if the two transitions have a common energy level. Various evidence indicates an unusually large value for the barrier to internal rotation of the CH3 group. (Author)

Descriptors :   (*ETHERS, MICROWAVE SPECTROSCOPY), (*MICROWAVE SPECTROSCOPY, ETHERS), (*MOLECULAR SPECTROSCOPY, ETHERS), MOLECULAR ISOMERISM, DIPOLE MOMENTS, EXCITATION, NUCLEAR RESONANCE, ELECTRON TRANSITIONS, ATOMIC ENERGY LEVELS, INTENSITY, LINE SPECTRA

Distribution Statement : APPROVED FOR PUBLIC RELEASE