title: Vibrational spectra and structure of organophosphorus compounds. X. Methyl torsional frequencies and barriers to internal rotation of some CH 3 PXY 2 compounds.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D007259:Infrared Rays; D008745:Methylation; D009905:Optical Rotatory Dispersion; D009943:Organophosphorus Compounds; D013057:Spectrum Analysis
chemical_list: D009943:Organophosphorus Compounds