title: Relationship between structure and photoinitiating abilities of selected bromide salts of 2-oxo-2,3-dihydro-1H-imidazo[1,2-a]pyridine (IMP): influence of the solvent and the substitution in benzaldehyde on the course of its reaction with IMP.
abstract: 2-Oxo-2,3-dihydro-1H-imidazo[1,2-a]pyridinium bromide and its C3-substituted derivatives have been synthesized and structurally characterized by X-ray crystallography and quantum chemical calculations. Their potential as photoinitiators for free-radical polymerization has been investigated experimentally and compared with theoretical results. It has been established that the course of the reaction that introduces the substituted benzylidene group to the imidazole ring is different in the protic and dipolar aprotic solvents, and also depends on the character of the substituent, as the energy change in the reaction favours either R1R2C=CHR3 or R1R2CH-CH(OCH3)R3 formation.
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Plutecka
authors.forename: Marcin
authors.initials: M
authors.lastname: Hoffmann
authors.forename: Urszula
authors.initials: U
authors.lastname: Rychlewska
authors.forename: Zdzisław
authors.initials: Z
authors.lastname: Kucybała
authors.forename: Jerzy
authors.initials: J
authors.lastname: Paczkowski
authors.forename: Ilona
authors.initials: I
authors.lastname: Pyszka