title: 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.
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-dicarboxylic 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, C10H2S2Cl2[symbol: see text], at m/z 256 and the dithienothiophene radical cation, C8S3Cl2[symbol: see text], at m/z 262 are formed from their respective precursor compounds.
authors.affiliation: Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Croatia.
authors.forename: G
authors.initials: G
authors.lastname: Karminski-Zamola
authors.forename: M
authors.initials: M
authors.lastname: Malesević
authors.forename: N
authors.initials: N
authors.lastname: Blazević
authors.forename: M
authors.initials: M
authors.lastname: Bajić
authors.forename: D W
authors.initials: DW
authors.lastname: Boykin
mesh_terms: D000813:Anilides / Q000032:analysis*; D003998:Dicarboxylic Acids / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D013876:Thiophenes / Q000032:analysis*
chemical_list: D000813:Anilides; D003998:Dicarboxylic Acids; D013876:Thiophenes