ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The weakly bound van der Waals complex CH4–CO has been observed spectroscopically for the first time in the infrared (C–O stretching, (approximate)2143 cm−1) and millimeter wave (80–107 GHz) regions. The spectra analyzed here resemble quite closely those of the rare gas–carbon monoxide complexes, like Ne–CO and Ar–CO, and they almost certainly arise from CH4–CO complexes composed of CH4 in the lowest j=0 rotational state of A symmetry. The effective ground state intermolecular separation is 3.994 Å. Predictions are given here for the K=0 and 1 pure rotational microwave transitions of CH4–CO in the A state. The infrared spectrum shows numerous additional transitions which must be due to CH4–CO composed of methane in the F and E symmetry states, but these have not yet been assigned. Future microwave measurements on these F and E states will aid further progress on the infrared spectrum. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1349425
