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The ethyl halides: Stable neutral and radical cation isomers [C 2 , H 2 , X] where X = F, Cl, Br, I
Author(s) -
Blanchette Marcia C.,
Holmes John L.,
Lossing F. P.
Publication year - 1987
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210221103
Subject(s) - chemistry , halide , ion , electron ionization , mass spectrometry , medicinal chemistry , reionization , gas phase , analytical chemistry (journal) , stereochemistry , ionization , inorganic chemistry , organic chemistry , chromatography
The following isomers of the ethyl halide molecular ions have all been shown to be stable species in the gas phase: [CH 2 CH 2 FH] + ˙; [CH 3 ClCH 2 ] + ˙ (ΔH f ° = 1012 kJ mol −1 ); [CH 3 CHClH] + ˙ (ΔH f ° = 971 kJ mol −1 ); [CH 2 CH 2 ClH] + ˙; [CH 3 BrCH 2 ] + ˙ (ΔH f ° = 1058 KJ mol −1 ); [CH 3 CHBrH] + ˙ (ΔH f ° = 995 kJ mol −1 ) and [CH 2 CH 2 BrH] + ˙. Neutralization–reionization mass spectrometry, employing Xe as the electron transfer target gas and O 2 as the target gas for reionization, indicated that the ylides CH 3 ClCH 2 and CH 3 BrCH 2 could not be generated by such means. However, the species CH 3 CHClH, CH 2 CH 2 ClH and CH 2 CH 2 BrH (and possibly CH 3 CHBrH) were unambiguously identified.