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Mass spectral fragmentation patterns of some new 3,7‐dichloro‐benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐dicarboxylic acid dianilides and 3,5‐dichloro‐dithieno[3,2‐b:2′,3′‐d]thiophene‐2,6‐dicarboxylic acid dianilides. II

1995; Wiley; Volume: 9; Issue: 5 Linguagem: Inglês

10.1002/rcm.1290090508

1097-0231

Grace Karminski‐Zamola, Miroslav Malešević, Nikola Blažević, Miro Bajić, David W. Boykin,

Structural and Chemical Analysis of Organic and Inorganic Compounds

Abstract The electron impact mass spectra of some benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐dicarboxylic acid dianilides and dithieno[3,2‐b:2′,3′‐d]thiophene‐2,6‐dicarboxylk acid dianilides are discussed. Dominant peaks in these dianilides are formed by the cleavage of a CN bond on one side of an anilino group. These ions fragment further by the cleavage of a CC bond on the other side of an anilino group and a CONRPhR′ group may be lost directly. After loss of CO, the characteristic benzodithiophene radical cation, C 10 H 2 S 2 Cl , at m / z 256 and the dithienothiophene radical cation, C 8 S 3 Cl , at m / z 262 are formed from their respective precursor compounds.