Tunable diode laser study of the ν[sub 2] infrared band of fluoroketene: Confirmation of anomalously low C==O stretching frequency.

Autor: Russell, Douglas K., Wesendrup, Ralf
Předmět:
Zdroj: Journal of Chemical Physics; 9/15/2002, Vol. 117 Issue 11, p5252, 5p, 3 Diagrams, 3 Charts, 1 Graph
Abstrakt: The short-lived molecule fluoroketene (FHCCO) was generated by laser pyrolysis of fluoroacetyl chloride in a static multipass cell to record the first high-resolution infrared spectrum of its υ[sub 2] fundamental band. More than 400 transitions between 2143 and 2160 cm[sup -1] were assigned and analyzed to yield very accurate rotational and centrifugal distortion constants for the upper vibrational state. The υ[sub 2] band origin of fluoroketene lies at 2147.826 93 cm[sup -1], which is surprisingly low compared to the band origins of other ketenes. This result is confirmed by matrix isolation Fourier transform infrared spectroscopy of all four monohaloketenes. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index