V. Tafeenko, K. Paseshnichenko, H. Schenk
1996
Citations
4
Influential Citations
6
Citations
Journal
Pure and Applied Chemistry
Abstract
X-ray structural investigations of 2-phenylimidazo[1,2-a]pyridine and two of its salts: 1-methyl-2-phenyl-imidazo[1,2-a]pyridinium iodide and 1-methyl-2-phenyl-6-nitro-imidazo[1,2-a]pyridinium iodide (R = 0.040, 0.032, 0.034 respectively), together with semi-empirical calculations of charge distribution, have been carried out. The insertion of nitro-group does not cause any fundamental changes in geometry, but induces changes in the electron density distribution in the bicyclic unit. As a result rather short cation-anion contacts (I... C = 3.52 A) are observed in structure III.