The Asymmetric Rotor. VIII. The Hydrogen Sulfide Band at 6300 Cm−1

The absorption spectrum of hydrogen sulfide in the region 6140 to 6420 cm−1 has been measured and the rotational fine structure analyzed through the use of published energy tables for the rigid rotor and a classical correction for centrifugal distortion. The excited state constants giving the best fit are A* = 10.39, B* = 8.90, and C* = 4.55 cm−1. The band center is located at 6289.5 cm−1. The value of IC—IA—IB and the strong Q branch, indicating the non-vanishing electric moment derivative to be along the least inertial axis, show the upper vibrational level to be the (111) state.