The v7 parallel band of Fe(CO)5 has been measured in the 620 cm-1 region using high-resolution diode laser absorption spectroscopy in a free jet expansion. A comparison with simulated band profiles indicated a rotational temperature of between 2 and 3 K in the jet. At these temperatures the K-structure of the Q-branch is partly resolved. The following molecular parameters were obtained: v0 = 619.95747(12) cm-1, B7 = 0.026743(2) cm- 1, A7 = 0.030721(1) cm-1. Approximate values of the quartic centrifugal distortion constants were also obtained from fitting the spectra. (C) 2000 Elsevier Science B.V.
Bibliographical noteFunding Information:
We thank Dr. M. Takami for helpful correspondence and Dr. J. Röpcke for the loan of one of the diode lasers used in this study. M. Loroño thanks the Universidad de Oriente, Venezuela and The Cambridge Overseas Trust for financial support.
- Free jet expansion
- Infrared laser absorption spectroscopy
- Iron pentacarbonyl
- V-Parallel band