Abstract
Rotationally resolved infrared absorption spectra for the 1(0)(1) band of jet cooled cobalt tricarbonyl nitrosyl have been observed and analyzed. Several longitudinal modes of a Pb-salt diode laser were utilized to measure 105 rovibrational transitions for this particular vibrational band centered near 2112 cm(-1). Spectra were optimized using both argon and helium carrier gases and these experiments eventually led to rovibrational transitions being assigned to four different K subbands, specifically the K = 0, 3, 6, and 9 subbands. An iterative least-squares analysis of the spectroscopic data yielded the following molecular parameters nu0 = 2111.7457(9) cm(-1), B0 = 0.034747(12) cm(-1), B1 = 0.034695(15) cm(-1), C1 = 0.03380(9) cm(-1), and D1K = 6.3(9) x 10(-6) cm(-1) (where 3sigma uncertainties are listed in parenthesis).
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