Solution-phase Raman spectra of L-alanyl-L-alanine and five nitrogen and/or a-deuterated isotopomers are reported. Detailed vibrational assignments on this set of spectra have led to a somewhat different interpretation of the amide I11 vibrational region, as compared to literature assignments. The differences result from the fact that, in these deuterated samples, the nature of certain vibrations, and their interactions with other vibrations of similar ...
