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High-Temperature Infrared Measurements in the Region of the Bending Fundamental of H12C14N, H12C15N, and H13C14N

✍ Scribed by A.G. Maki; G.Ch. Mellau; S. Klee; M. Winnewisser; W. Quapp

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
801 KB
Volume
202
Category
Article
ISSN
0022-2852

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✦ Synopsis

High-resolution measurements have been made on the infrared emission spectrum of H 12 C 14 N, H 12 C 15 N, and H 13 C 14 N at temperatures on the order of 1370 K. The measurements cover the region 400 -850 cm Οͺ1 with a resolution of 0.006 cm Οͺ1 . New room-temperature absorption measurements are also reported for H 13 C 14 N in the regions, 1200 -1500 cm Οͺ1 and 2500 -3700 cm Οͺ1 . These measurements are combined with earlier measurements to obtain improved values for the rovibrational constants for these three isotopomers. The high temperatures allowed us to measure the bending vibrational levels up to the 0 11 11 0 state, at more than 7900 cm Οͺ1 above the ground vibrational level, for H 12 C 15 N and H 13 C 14 N, and the 0 10 10 0 state for H 12 C 14 N. The Coriolis interaction responsible for the laser transitions of H 12 C 14 N and H 12 C 15 N has also been observed, for the first time, for H 13 C 14 N. New r e values are given using the B e values found in this paper and in a recent paper on deuterated isotopomers.

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We have measured the Fourier transform spectrum ( FTS ) of two isotopomers of hydrogen cyanide ( H 12 C 14 N and H 12 C 15 N ) from 500 to 10 000 cm 01 . The infrared data have been combined with earlier published microwave and submillimeter-wave measurements. From this analysis new vibration -rotat