Studies of selenides of thiophene and furan series—V: Mass spectra of some thiophene, furan and selenophene derivatives

Abstract Mass spectra of some selenides, sulphides and ethers of furan, thiophene and selenophene series are described. A new fragmentation reaction, consisting in splitting off alkyl, insertion of heteroatom in the cycle and loss of one of heteroatoms as CX, is discussed in detail.