2-Amino-1-methyl-1H-imidazol-4(5H)-one dimethyl sulfoxide monosolvate

Abstract

In the title compound, C4H7N3O·C2H6OS, creatinine [2-amino-1-methyl-1H-imidazol-4(5H)one] exists in the amine form. The ring is planar (r.m.s. deviation for all non-H atoms = 0.017 Å). In the crystal, two creatinine molecules form centrosymmetric hydrogen-bonded dimers linked by pairs of N—H...N hydrogen bonds. In addition, creatinine is linked to a dimethyl sulfoxide molecule by an N—H...O interaction. The packing shows layers parallel to (120).