Vibration-rotation absorption lines of HCS+ have been detected between 718 and 816 cm−1 by diode laser spectroscopy, and assigned to P-, Q-, and R-branch components of the ν2 bending fundamental. Their accurate analysis yields the first measurements of the rotational parameters B and D and the l-doubling constant q for the 0110 level. The band center was determined to be 766.453 (1) cm−1.
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Davies et al. (1985) studied this question.
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