MASS-SPECTRA OF SUBSTITUTED N-ALKYLPYRROLES AND RELATED-COMPOUNDS

Authors
LIN ST SHIUE GY KUO YH SHIH KS
Citation
St. Lin et al., MASS-SPECTRA OF SUBSTITUTED N-ALKYLPYRROLES AND RELATED-COMPOUNDS, Journal of the Chinese Chemical Society, 41(1), 1994, pp. 27-31
Citations number
7
Categorie Soggetti
Chemistry
Journal title
Journal of the Chinese Chemical Society → ACNP
ISSN journal
00094536
Volume
41
Issue
1
Year of publication
1994
Pages
27 - 31
Database
ISI
SICI code
0009-4536(1994)41:1<27:MOSNAR>2.0.ZU;2-#
Abstract
Under E1 conditions, substituents on N-alkylpyrroles affect fragmentat ion of the alkyl groups. The electron-withdrawing character of the cya no group retarded formation of a N-methylene cation, and a labile subs tituent, i.e., -CHO, -CH2COOMe, competed with an N-alkyl group to be a initial fragmentation center. MNDO calculation of the heat of formati on of possible fragment ions showed that protonated pyridine is the mo st stable among the isobaric ions.