Abstract
The ν6 parallel band of C2F6 has been measured at high resolution by using diode laser absorption spectroscopy in a free jet expansion. A comparison of the rotational intensity distribution with simulated band profiles indicated a rotational temperature of between 2 and 3 K in the jet. In addition to the fundamental band, weak Q-branches of other bands were also found, both to the red and to the blue side of the ν6 fundamental Q-branch. The band origin of the ν6 mode was measured as 713.671 05(10) cm-1. The B rotational constants were determined in different ways as described in the text. A preferred value of B0 = 0.061 580 6(22) cm-1 was selected for simulation purposes. This value is independent of the electron diffraction structure.
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