Regioselective chloride ion loss from chlorine-37 enriched polychlorodibenzofurans by negative-ion mass spectrometry.
Regiospecific chlorine-37 enriched dichloro-, trichloro-, tetrachloro-, and pentachlorodibenzofuran isomers were investigated under electron capture negative-ion mass spectrometry (ECNIMS) conditions. The relative chloride ion loss from the enriched positions was determined from the chloride-37 and chloride-35 ion abundances after correcting for the isotopic enrichment. Regioselective chloride anion losses were observed with the carbon 3-chlorine bond (beta-chlorine) generally found to be the most labile. The carbon-chlorine bond cleavages can be loosely associated with calculated carbon-chlorine bond residual charges.
Chang
Y S
YS
Department of Agricultural Chemistry, Oregon State University, Corvallis 97331.
Laramée
J A
JA
Deinzer
M L
ML
D001572:Benzofurans / Q000032:analysis*; D002712:Chlorides / Q000032:analysis*; D007554:Isotopes; D013058:Mass Spectrometry; D011108:Polymers / Q000032:analysis*
D001572:Benzofurans; D002712:Chlorides; D007554:Isotopes; D011108:Polymers; C016068:polychlorodibenzofuran