The infra-red spectrum of C2HD in the region of the bending fundamental ν4

Abstract
The infra-red spectrum of 12C2HD, in the region of the bending fundamental ν4 around 520 cm-1, has been studied at a resolution better than 0·02 cm-1. In addition to the fundamental the hot bands starting from the levels ν4 and ν5 have been investigated and special attention has been paid to the effects of l-type resonances on the vibrational levels 2ν4 and ν4 + ν5. Vibrational constants associated with the bending modes are given.

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