THE MICROWAVE SPECTRUM OF ISOBUTYLENE
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Date
1959
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Ohio State University
Abstract
The microwave spectrum of isobutylene has been studied in the range from 19--33 kmc, and a number of rotational transitions have been identified. The pattern of the low-J transitions is that of an effective rigid rotor with the constants $a_{o} = 9133.32$ Mc, $b_{o} = 8381.61$, $c_{o} = 4615.99$. Certain high-J lines are split into triplets by the internal rotation of the two methyl groups. A preliminary analysis of these splittings implies an internal barrier of 2.3 kcal/mole.
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Author Institution: National Bureau of Standards