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Stable C 2 H 5 X +˙ (X=Cl, Br) radical cations of structure [CH 3 CHXH +˙ ]: Their energetics and dissociation characteristics
Author(s) -
Holmes John L.,
Burgers Peter C.,
Terlouw Johan K.,
Schwarz Helmut,
Ciommer Bernhard,
Halim Herman
Publication year - 1983
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.1210180506
Subject(s) - chemistry , standard enthalpy change of formation , dissociation (chemistry) , energetics , radical ion , fragmentation (computing) , carbene , standard enthalpy of formation , enthalpy , ion , gas phase , ionization , ionization energy , bond dissociation energy , methyl radical , medicinal chemistry , radical , organic chemistry , thermodynamics , catalysis , physics , computer science , operating system
A new radical cation having the methyl carbene type structure [CH 3 CHClH] +˙ has been characterized in the gas phase. It is readily generated by the dissociative ionization [CH 3 CHCICO 2 H] +˙ → CO 2 +[CH 3 CHCIH] +˙ . Its enthalpy of formation has been estimated to be 951 kJ mol −1 , close to that of [CH 3 CH 2 CI] +˙ . The principal fragmentation characteristics (loss of HCl and Cl ˙ ) of the ion are discussed. A brief description of the bromo analogue [CH 3 CHBrH] +˙ is also given.