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Identification of two separate mechanisms for HCN loss from gas phase quinoline cations
Author(s) -
Baldwin Michael A.,
Langley G. John
Publication year - 1986
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.1210210107
Subject(s) - quinoline , metastability , chemistry , ion , elimination reaction , gas phase , carbon fibers , phase (matter) , medicinal chemistry , materials science , organic chemistry , composite number , composite material
Critical energy measurements on 13 C‐labelled quinolines show that the energy requirement for elimination of H(C‐2)N from metastable ions is lower than that for H(C‐3)N elimination, the critical energies being 4.03 ± 0.05 eV and 4.17 ± 0.05 eV, respectively. It is also shown that involvement of C‐2 and C‐3 in unimolecular HCN elimination from ions in the second field‐free region is greater, by factors of approximately 3 and 2 respectively, than would be anticipated for elimination following complete carbon randomization.