Structure of (<i>R</i>,<i>R</i>)-4-bromo-2-{4-[4-bromo-1-(4-toluenesulfonyl)-1<i>H</i>-pyrrol-2-yl]-1,3-dinitrobutan-2-yl}-1-(4-toluenesulfonyl)-1<i>H</i>-pyrrole, another ostensible by-product in the synthesis of <i>geminal</i>-dimethyl hydrodipyrrins

The crystal structure of ( R , )-4-bromo-2-{4-[4-bromo-1-(4-toluenesulfonyl)-1 H -pyrrol-2-yl]-1,3-dinitrobutan-2-yl}-1-(4-toluenesulfonyl)-1 -pyrrole 1 C 26 24 Br 2 N 4 O 8 S ) is presented. title compound was isolated in suitable yield as a by-product our synthesis geminal -dimethyl hydrodipyrrins. We observe an unforeseen enantiomeric resolution both the bulk sample and with distinct C—H...O (C methyl —H...O nitro sp 3 sulfonyl interactions observed enantiomers present, along other interactions, namely 5-pyrrolyl forming polymer crystallographic c -axis direction. Whilst pyrrolic fragments are well documented literature, little data found surrounding 1,3-dinitrobutane scaffold.