Ground-State Molecular Constants of Hydrogen Sulfide

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, τaaaa=—(8.06±0.13)×10−3, τbbbb=—(4.84±0.04)×10−3, τaabb=+(4.57±0.10)×10−3, τabab=—(1.31±0.06)×10−3, H0K=—(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: re=1.3356 and φ=92°07′.