Infrared Laser Spectroscopy of the ν2 Band of Difluorocarbene (CF2)

✍ Scribed by H.B. Qian; P.B. Davies

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 340 KB
• Volume: 169
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1016

✦ Synopsis

The spectrum of the (\nu_{2}) fundamental band of (\mathrm{CF}{2}\left(\dot{X}^{1} A{1}\right)) has been recorded at Dopplerlimited resolution between 638 and (706 \mathrm{~cm}^{-1}) using a diode laser spectrometer. This band is predicted to be about 250 times weaker than the symmetric stretching vibration of (\mathrm{CF}{2}), and a multiple pass cell with an effective absorption length of (25 \mathrm{~m}) was therefore employed in the measurement. A total of 217 transitions with (J \leqslant 40) and (K{a} \leqslant 7) were assigned and used in a least-squares (f) it in which the ground state constants were fixed at their microwave values and the (v_{2}=1) parameters were floated. The band origin was determined to be (666.24922(9) \mathrm{cm}^{-1}). (c) 1995 Academic Press. Inc.