Letter to the Editor
The millimeter-wave spectrum and the dipole moment of vinylacetylene *
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
Corresponding author: S. Thorwirth, firstname.lastname@example.org
Accepted: 15 December 2002
The pure rotational spectrum of the hydrocarbon vinylacetylene (1-butene-3-yne, ) in its ground vibrational state has been investigated from 80 to 165 GHz, covering the rotational quantum numbers and , in order to provide accurate rest frequencies for radioastronomical searches. Moreover, quantum chemical calculations of the dipole moment components and have been performed leading to the result D. The value for the dipole moment component is very low and lies in the range of several thousandth to a few hundredth of a Debeye.
Key words: molecular data / methods: laboratory / techniques: spectroscopic / stars: AGB and post-AGB
© ESO, 2003