FT-Infrared and FT-Raman spectra are presented for a series of MesNP
derivatives. N-15-labeled samples and comparisons between compounds al
low for reliable assignment of NP stretching frequencies. The observed
isotopic shift is consistent with calculated values, and assignments
are supported by the observation of a relationship between the relativ
e Raman intensity of the NP stretch and the bond angle at the nitrogen
center (C-N-P).