Calculated Band Intensities for CO2 from Infrared Dispersion Data

“The band intensities for the CO₂ fundamentals have been calculated from the infrared dispersion data of wetterblad.¹ For the band at 2349.3 cm⁻¹ (\ν₃) a value A₃ = 2970 cm⁻² at N.T.P. was obtained and for the band at 667 cm⁻¹ (\ν₂) a value A₂ = 240 cm⁻² resulted. In calculating intensities the data used was sufficiently removed from the band centers that an harmonic oscillator approximation allowed a satisfactory fit to the data. The value for A₂ is in exact agreement with the most recent results obtained from absorption studies.2,3 The value for A₃ is some 10\% higher than the corresponding absorption value of 2693.3 cm-2,4”