Abstract

The vibration-rotation spectrum of the ν 6 fundamental of methyl iodide has been recorded in the 824 to 862 cm −1 region by using a tunable semiconductor diode laser spectrometer. The rotational analysis performed for six Q branches p Q( J,3), p Q( J,4), p Q( J,5), p Q( J,6), p Q( J,7), and q Q( J,8) led to accurate values for several molecular constants. The nuclear quadrupole splitting arising from the spin of iodine has been observed very clearly in the low J transitions and for various K values.

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