MICROWAVE SPECTRUM OF ETHOXYETHYNE

Abstract

The microwave spectrum of ethoxyethyne, $CH_{3}CH_{2}OC$ = CH has been studied in the frequency region 12.4 - 32.0 GHz. The spectrum reveals two rotational isomers, an anti form and a gauche form with dihedral angle approximately $115^{\circ}$ (from anti). Provisional relative intensity measurements indicate that the anti form has slightly lower energy.