ROTATIONAL RAMAN-SPECTRUM OF CYCLOPROPANE

The pure rotational Raman spectrum of cyclopropane was observed up to J = 43. We have taken into account the effects of the unresolved K structure of the lines by assigning an effective value of K to the center of each unresolved line. Methods are developed for calculating effective K values for each value of J that allow a simultaneous fit to the R-and S-branch lines. The rotational constants of cyclopropane derived from this research are, in wavenumber units (cm-1); B0 = 0.67028, DJ = 1.0 × 10-6, and DJK = -1.3 × 10-6. We have also tested the validity of the method by using it with recent Raman data for BF3. © 1978.