The spectrum of natural hydrogen sulfide between 2150 and 2950 cm⁻¹

Abstract

Spectra of hydrogen sulfide have been recorded between 2150 and 2950 cm−1 with a Fourier transform spectrophotometer at a resolution of 0.01 cm−1. Most of the absorption in this region is due to the 2ν2, ν1, and ν3 bands of H232S, H233S, and H234S observed in natural abundance. A careful analysis of the spectra, combined with recent data on the ground states of the three isotopic species, led to an improved and extended set of rotational energy levels of the (020), (100), and (001) vibrational states of these isotopes. The rovibrational levels have been subjected to a least squares fit, using a Hamiltonian which takes the effects of Coriolis resonance explicitly into account, and precise rotational and coupling parameters have been determined.About 529 individual line intensities have been measured and from them it has been possible to deduce the expansion of the transformed transition moment operators of the three bands 2ν2, ν1, and ν3 and to determine the first derivatives of the dipole moment[Formula: see text]Finally, a complete list of line positions and intensities of natural hydrogen sulfide has been computed which should be of interest for the analysis of infrared spectra of the giant planets and for pollution studies.

Noble Gas Broadening in Fundamental Bands of H2S

“…The strong cients a pronounced JЉ dependence and no KЉ a trend was interactions between the n 1 , n 3 , and 2n 2 (centered at 2354.0 determined. Similar differences are known for NO 2 , where cm 01 ) bands were taken into account in the work by LechPustogov et al (19) stated no significant trend in the quanuga-Fossat et al (7). This study includes the strong Coriolis tum number dependencies of the self-and air-broadening interaction between the n 1 and n 3 bands and the 2n 2 and n 3 coefficients, but Sumpf et al (20) measured at least for bands.…”

High Resolution Vibrational–Rotational Spectrum of H2S in the Region of the ν2Fundamental Band

“…At the same time, up to date DJ Å 0, {1; DK A Å {(2n / 1); [1] there is no precise information about the vibration-rotation spectrum of the n 2 band.…”

“…The strongest ''allowed'' transiworks in the determination of the line positions and the tions are obtained from Eq. [1], when m Å n Å 0. The values of energy levels cannot be considered satisfactory at other combinations of m and n correspond to the weaker the present time.…”

“…many studies during the past 25 years (see, e.g., Refs. (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11) and references cited there). Many high-energy vibrational-…”

The Overtone Spectrum of H232S near 13 200 cm−1

“…In particular, the rotational constants of the local mode pair are expected to be the same and to follow simple arithmetic relations, while the H 21 Coriolis interaction between the local mode states is expected to vanish. On the other hand, a strong H 22 resonance (also called ␣ resonance) is expected to occur between the rotational states of the close lying local mode states (8).…”