High-resolution infrared spectrum of propyne: The 30 μm region

• Published in: Journal of molecular spectroscopy 1990-12, Vol.144 (2), p.389-415
• Main Authors: Graner, Georges, Wagner, Georg
• Format: Article
• Language: English
• Subjects: Atomic and molecular physics; Exact sciences and technology; Molecular properties and interactions with photons; Physics; Properties of molecules and molecular ions; Rotation, vibration and vibration-rotation constants
• ISSN: 0022-2852; 1096-083X
• DOI: 10.1016/0022-2852(90)90226-G

A high-resolution (0.002 cm −1) spectrum of propyne in the region of 30 μm has been used to improve the constants of ν 10 and to analyze its hot bands. For ν 10, it was found necessary to use η JJ , η JK , η KK , and even η KKK and η KKKK constants to fit the high K series correctly. A standard deviation of 0.00021 cm −1 was obtained. The assignments were more challenging for the hot bands. Finally, more than 2000 transitions were assigned in the 2 ν 10 ±2- ν 10 +1 band and more than 1500 in 2 ν 10 0- ν 10 ±1. The final fit, also including ν 9, and microwave data will be presented in a future paper.