Rovibronic spectroscopy of the Ã(1A′)–X̃(1A′′) transition in the bromochloromethylene radical

✍ Scribed by Craig A Richmond; Joseph S Guss; Klaas Nauta; Scott H Kable

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 457 KB
• Volume: 220
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1016/s0022-2852(03)00107-3

✦ Synopsis

The à Að 1 A 0 Þ $ X X ð 1 A 00 ) spectroscopy of jet-cooled CBrCl has been measured by both laser-induced fluorescence excitation and dispersed fluorescence. All three vibrational frequencies were assigned and measured in both electronic states, including the first gas phase measurements of the C-Cl stretching frequencies, m 00 1 ¼ 759 and m 0 1 ¼ 716 cm À1 . An almost complete set of anharmonicity constants, x ij , were evaluated in both electronic states. In the Ã

A state these values were measured for all isotopomers involving 35;37 Cl and 79;81 Br. The LIF spectrum was measured to the limit of observable Franck-Condon intensity. No evidence was found for shortening of the fluorescence lifetime or for large changes in the A 0 rotational constant, which have been observed in other halocarbenes and indicate the presence of other photochemical or photophysical pathways.