artículo con referato
"Structural study of a new 1-(2-thienyl)-3-(3-methyl-2-thienyl)-propenone, in-situ radiation-induced dimerization products"
Y. Moreno, D. Contreras, A. Buljan, F. Brovelli and R. Baggio
J. Chil. Chem. Soc., 55, Nº4 (2010) 519-521
Abstract
The new conjugated system (“chalcone kind”) reported herein, 1-(2-thienyl)-3-(3-methyl-2-thienyl)-propenone, C12H10OS2 presents a monomeric molecular structure, and it most interesting aspects are to be found in it intermolecular interactions, of varied type (C–H⋯O, C–H⋯π, π⋯π) and strength. Some anomalies detected in the refinement process, however, provided evidence that an unexpected in-situ, radiation-induced dimerization reaction had taken place during data collection, with the starting and final products coexisting in a topotactic fashion. This effect is depended of structural packing; that is not all this kind of conjugated system presents this effect. The main factor is the distance between the double bonds of neighboring monomers (about 3 Å).
DEPARTAMENTO FISICA DE LA MATERIA CONDENSADA