THE PERPENDICULAR BANDS OF ALLENE AND ALLENE d4

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1958

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Ohio State University

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Abstract

The distribution of intensity in the perpendicular bands of allene has been examined, taking into account the effect of the Coriolis interaction between the degenerate levels $\nu_{2}$ and $\nu_{10}$. The results indicate that in all the perpendicular bands of allene and allene-$d_{4}$ the $^{R}{Q}_{0}$ branch lies on a line which divides the band into two equal (or very nearly equal) areas. This has been used as a criterion for a new rotational assignment of these bands and the rotational constants A and $\zeta$ have been re-evaluated. The present A values, together with $Stoicheff’s^{1}$ B values indicate that the CH bond length is 1.061 A and the HCH angle $116^{\circ}$.

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$^{1}$B. P. Stoicheff, Can. J. Phys. 33, 811 (1956).
Author Institution: Department of Chemistry, University of Minnesota, Minneapolis, MN

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