The mass spectrum of 1‐(2‐thienyl) hexane‐1‐¹³C

Abstract

The mass spectrum of 1-(2-thieiiyl)he~aiie-l-~~C is reported. The principal fragmentation routes of the parent ion are delineated. Beta cleavage of the alkyl chain predominates, and the label retention indicates that the alpha carbon atom remains with the charged ring moiety. A substantial part of the m/e 97 ion undergoes a ring expansion to a six membered ring. A small amount of alpha cleavage of the alkyl chain occurs with the expected loss of the label. Further fragmentation of the ions from initial alpha or beta cleavage produces similar fragment ions. It is noted that many of the neutral particles lost in the formation of the fragment ions are typical of those encountered in the alkylbenzenes or other aromatic ion systems.

Mass spectrometry

“…Deuterium labeling is used most frequently; however, 18C, 14C, and 180, as well as 19F (134), have also been used. Rearrangements of 1-phenylheptenes (184), carbon-skeletal rearrangements of butene ions (185), of aniline (186), of l-(2-thienyl)hexane (187), of toluene (188), of five classes of trityl compounds (189), of o-terphenyl (190), of aromatic amines (191), and fragmentations of methyl esters of normal long-chain monoacids (192) have been studied with 13C-labeling.…”