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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
Author(s) -
KarminskiZamola Grace,
Malešević Miro,
Blažević Nikola,
Bajić Miro,
Boykin David W.
Publication year - 1995
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290090508
Subject(s) - chemistry , thiophene , fragmentation (computing) , cleavage (geology) , mass spectrum , radical ion , ion , bond cleavage , stereochemistry , dicarboxylic acid , electron ionization , medicinal chemistry , crystallography , polymer chemistry , organic chemistry , geotechnical engineering , fracture (geology) , computer science , engineering , catalysis , ionization , operating system
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 CN bond on one side of an anilino group. These ions fragment further by the cleavage of a CC 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 2 □ + ., at m / z 256 and the dithienothiophene radical cation, C 8 S 3 Cl 2 □ + ., at m / z 262 are formed from their respective precursor compounds.