(R)-2-[1-(2,6-Dichloro-3,4,5-trimethoxybenzoyl)pyrrolidin-2-yl]-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-1-oxyl 3-oxide

Abstract

In the title compound, C21H28Cl2N3O6, the nitronyl nitroxide ring displays a half-chair conformation, whereas the pyrrolidine ring has an envelope conformation. These two rings are twisted to each other with N—C—C—N torsion angles around the connecting C—C bond of 48.9 (6) and −127.0 (5)°. The benzene ring is nearly perpendicular to the pyrrolidine ring, with torsion angles around the connecting C—C bond of 86.3 (6) and −97.7 (6)°. The crystal structure is stabilized by C—H...O and C—H...π hydrogen bonds, which build up a three-dimensional network.