Electron-impact mass spectra of carbomethoxyl derivatives of cyclopropylthiophenes
In the mass spectra of carbomethoxyl derivatives of cyclopropylthiophene, intense ion peaks are observed, corresponding to successive elimination of MeO and COOMe radicals and the neutral fragments MeOH, HCOOMe, and CO from M/sup +./, so that the number of carbomethoxyl substituents in CPR can be determined. Mono- and gem-dicarbomethoxyl derivatives of cyclopropylthiophenes are characterized by rearrangements of M/sup +./ with migration of the MeO groups to the carbon atom adjacent to the thiophene ring. The presence of a methyl substituent at this carbon atom hinders this rearrangement. For the monocarbomethoxyl derivatives of cyclopropylthiophenes under electron impact, a splitting off of the methyl substituent of the ester groups is observed.
- Research Organization:
- N.D. Zelinskii Institute of Organic Chemistry, Moscow, USSR
- OSTI ID:
- 6227282
- Journal Information:
- Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Vol. 35:7; Other Information: Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya; 35: No.7, 1501-1505(Jul 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
CARBOXYLIC ACID ESTERS
MASS SPECTRA
POLYCYCLIC SULFUR HETEROCYCLES
CARBOXYLATION
ESTERIFICATION
CONFORMATIONAL CHANGES
CYCLOALKANES
DISSOCIATION
ELECTRON BEAMS
ELECTRON-MOLECULE COLLISIONS
IONIZATION
MOLECULAR IONS
ALKANES
BEAMS
CHARGED PARTICLES
CHEMICAL REACTIONS
COLLISIONS
ELECTRON COLLISIONS
ESTERS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IONS
LEPTON BEAMS
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PARTICLE BEAMS
SPECTRA
400201* - Chemical & Physicochemical Properties
640304 - Atomic
Molecular & Chemical Physics- Collision Phenomena