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Spectroscopy of the Acetylenic CH Stretch of Propyne-d3 in the Region of the Second Overtone

✍ Scribed by Y. Ganot; X. Chen; I. Bar; S. Rosenwaks

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
63 KB
Volume
208
Category
Article
ISSN
0022-2852

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✦ Synopsis

The rovibrational overtone spectrum of propyne-d 3 (CD 3 -C≡C-H) in the region of the second overtone of the acetylenic C-H stretch (3ν 1 ) was monitored employing photoacoustic laser absorption spectroscopy. Comparison of the observed spectrum with that simulated for a symmetric-top molecule revealed the assignment. The observed spectrum comprises the main parallel band, 3ν 1 , overlapped by two hot bands identified as 3ν 1 + ν 10 -ν 10 and 3ν 1 + 2ν 10 -2ν 10 , where ν 10 is the degenerate C-C≡C bend. The bands are resolved for the total angular momentum, allowing derivation of the parameters of the 3ν 1 state and of some of those of the hot bands.

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