J. Portilla, J. Quiroga, J. Cobo
2005
Citations
0
Influential Citations
3
Citations
Journal
Acta crystallographica. Section C, Crystal structure communications
Abstract
5-methyl-2-(4-methylphenyl)-7,8-dihydro-6H-cyclopenta[g]pyrazolo[1,5-a]pyrimidine, C17H17N3, 2-(4-chlorophenyl)-5-methyl-7,8-dihydro-6H-cyclopenta[g]pyrazolo[1,5-a]pyrimidine, C16H14ClN3, and 2-(4-bromophenyl)-5-methyl-7,8-dihydro-6H-cyclopenta[g]pyrazolo[1,5-a]pyrimidine, C16H14BrN3, are isostructural; in each compound, the molecules are linked into chains by a single C-H...pi(arene) hydrogen bond. Molecules of 2-(4-methoxyphenyl)-5-methyl-7,8-dihydro-6H-cyclopenta[g]pyrazolo[1,5-a]pyrimidine, C17H17N3O, are linked by a single C-H...N hydrogen bond into chains, which are themselves linked into sheets by a pi-pi stacking interaction.