The experimentally determined structures of small peptides, from the simplest dipeptide to smaller oligopeptides, would significantly contribute to development of physically reliable potential energy functions suitable to study the conformation and dynamics of larger peptides and proteins. The determination of small peptide structures in solution is a challenging task which typically requires several spectroscopic methods such as Raman, infrared, NMR, UV-CD and VCD. In this proposal we would like to use inelastic neutron scattering on the new spectrometer, Lagrange, and IN4. We will exploit the sensitivity of INS to proton dynamics and contrast variation via partial deuteration to highlight specific vibrational modes to probe peptide structures stabilized with intra- and inter-molecular hydrogen bonds (C7, -turns). In addition, an elastic scattering experiment on D4 will be proposed.