The microwave spectrum and molecular structure of CO2-HCl

Abstract

Radio frequency and microwave molecular beam electric resonance spectra have been obtained for three isotopic species of the hydrogen-bonded weakly bound complex CO2-HCl. The following spectroscopic constants have been determined: CO2-H35Cl CO2-H37Cl CO2-D35Cl B0 (MHz) 1109.886(2) 1080.000(2) 1108.100(3) DJ (kHz) 4.63(4) 4.90(5) 4.71(6) eqQ αC1 (MHz) -49.573(2) -39.084(22) -52.7243(7) eqQαD (MHz) ⋯ ⋯ 0.1419(28) μ (D) 1.4509(4) ⋯ 1.48874(7). This complex most likely has a linear equilibrium geometry with an O-H bond length of 2.14 Å. A large induced dipole moment is found in this complex. A comparison of structural properties for this and other related weakly bound molecules is made. © 1982 American Institute of Physics.