Ground-State Molecular Constants of Hydrogen Sulfide

Abstract

A simultaneous analysis of 185 distinct ground‐state combination differences taken from the (1, 1, 1) and (2, 1, 0) absorption bands of H₂³²S together with the two microwave transitions reported by Burrus and Gordy, yielded the following values for the ground‐state molecular constants (in cm⁻¹): A₀=10.3599±0.0004, B₀=9.0156±0.0005, C₀=4.7315±0.0004, τ_aaaa=—(8.06±0.13)×10⁻³, τ_bbbb=—(4.84±0.04)×10⁻³, τ_aabb=+(4.57±0.10)×10⁻³, τ_abab=—(1.31±0.06)×10⁻³, H₀^K=—(4.6±1.6)×10⁻⁸ (with simultaneous confidence intervals at the 95% level). Equilibrium structural parameters determined from the values of A and B in the (1, 1, 1) and ground states are: r_e=1.335₆ and φ=92°07′.