ELECTRON-IMPACT MASS-SPECTRA OF SOME BIS-(-BENZOTHIAZOLYL)FURANS AND BIS-(2-BENZOTHIAZOLYL)THIOPHENES

The electron impact mass spectra of some bis-(2-benzothiazolyl)furans and bis-(2-benzothiazolyl)thiophenes have been recorded and the identi ty of various ions in the mass spectra established. Compounds 1 and 2 present model substances and it is found that their fragmentation path way is similar to the mono-(2-benzothiazoles). Compounds where the ben zothiazolyl groups are directly substituted on the furan nuclei, but i n different positions, exhibit two main pathways of fragmentation: fra gmentation of the furan nucleus and fragmentation of the benzothiazole nucleus, Other compounds studied show specific fragmentation characte ristic for divinyl furan compounds and for compounds with a phenyl sub stituent between two heterocyclic nuclei.