... 'Organoselenium Chemistry. Part IV. For Part 111 see ref. 16. ... J. CHEM. VOL. 52, 1974 ... (iii) The assignments 1 and2 CsHs CH37 of the 13C chemical shifts of the aliphatic F'H carbons is made on the basis of the coupled 13C ~1 spectrum. The P-methyl carbon atom appears as ...