Infrared and Microwave Spectra and Force Field of DBO: The Coriolis Interaction between the ν1and ν2+ ν3States

✍ Scribed by Yoshiyuki Kawashima; Pina Colarusso; K.Q. Zhang; Peter Bernath; Eizi Hirota

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 452 KB
• Volume: 192
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1998.7633

✦ Synopsis

The 1 and 3 bands of D 11 BO and the 1 band of D 10 BO were observed by using an infrared diode laser spectrometer. The DBO molecule was generated by an ac discharge in a mixture of BCl 3 , D 2 , O 2 , and He. As inferred previously, a strong Coriolis interaction was in fact found to take place between the 1 and 2 ϩ 3 states, and an analysis of the observed 1 spectra, which explicitly took into account this Coriolis interaction, predicted the pure rotational transition frequencies of DBO in the 1 state. Pure rotational lines were then detected by microwave spectroscopy, confirming the validity of the infrared assignment. In the microwave experiment DBO molecules were generated by a discharge in a mixture of B 2 D 6 and O 2 . The three fundamental bands and a hot band of D 11 BO, as well as the 1 and 3 bands of D 10 BO, were subsequently recorded in emission with a Fourier transform infrared spectrometer. DBO molecules were generated by the reaction of D 2 with HBO at temperatures above 800°C in a ceramic tube furnace. All of the observed spectra were simultaneously subjected to a least-squares analysis to obtain molecular parameters in the ground, 1 , 2 , 3 , and 2 ϩ 3 states. The results thus obtained improved the force field and molecular structure of the HBO/DBO molecules reported in a previous study (Y.