Portal de Periódicos da CAPES

A study of the fragmentation of caprolactam and its methyl derivatives under electron‐impact

1971; Wiley; Volume: 5; Issue: 6 Linguagem: Inglês

10.1002/oms.1210050604

2376-3884

J. Mitera, V. Kubelka,

Radioactive element chemistry and processing

Abstract A study of the low and high‐resolution mass spectra of caprolactam (I), 1‐methylcaprolactam (II), 3‐methylcaprolactam (III), 4‐methylcaprolactam (IV), 5‐methylcaprolactam (V), 6‐methylcaprolactam (VI), 7‐methylcaprolactam (VII) and deuterium labelled compounds has facilitated the proposal of some principal fragmentation mechanisms of ionized molecules of these compounds. The base peaks in the spectra of all compounds studied (except 3‐methylcaprolactam) are the ions m/e 30 and m/e 44 respectively formed through the cleavage of the C6–C7 bond and the C2–N bond with simultaneous transfer of a hydrogen atom. It has been proved that the fragmentation of molecular ions leading to ions with the structure of cyclopentanone 2‐methylcyclopentanone and 3‐methylcyclopentanone respectively (according to the position of methyl group) is the general feature of the fragmentation of caprolactam and its methyl derivatives.