Ground-state rotational spectrum and spectroscopic parameters of the gauche butane conformer
- 1 May 1989
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 67 (1) , 131-140
- https://doi.org/10.1080/00268978900100961
Abstract
The rotational spectrum of gauche butane, CH3(CH2)2CH3, has been investigated between 100 and 150 GHz, and vibronic-ground-state transitions have been assigned. In a few cases, multiplet splitting caused by internal tunnelling was observed. Most of the transitions appear as singlets which could be analyzed in terms of the standard rigid-rotor model including centrifugal perturbations up to sixth order. The electric dipole moment, oriented along the molecular b axis, was measured to be (0·0900 ± 0·0015) D.Keywords
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