ANALYSIS OF THE SHAPE OF THE FUNDAMENTAL ABSORPTION-BAND OF CO IN SOME CHLORINATED SOLVENTS

The fundamental infrared absorption band of CO in solution in four chl orinated solvents has been recorded. Quantitative bandshape analyses h ave been made in order to evaluate the band moments and autocorrelatio n functions. Solute-solvent interaction is found to increase with the dipole moment, but to decrease with the polarizability of the solvent molecule. An analysis of the wings of the absorption bands shows that rotation-vibration coupling is important and that a simple asymmetry c orrection with the use of the Boltzmann factor is insufficient to acco unt for the observed asymmetry.