Fragmentation of valine and proline in resonant free electron capture reactions

The processes of resonant electron capture by molecules of valine and proline were studied. The main dissociative decay channels of molecular ions and the structures of fragment ions were established. The reactions of simple bond cleavage and H-shift rearrangement processes were revealed. The dissociative electron attachment cross-sections for M - H]^? ions were measured in the region of 1.25 eV. The metastable decay of M - H]^? ions were found in the energy region of 4.5?C8 eV. The structures of decomposing parent ions were determined using the statistical model of metastable fragmentation.