2,2-DIMETHYL-5-(DIMETHYLAMINO)INDAN-1,3-DIONE

The title compound, C13H15NO2, lies on a crystallographic mirror plane. The indan-1,3-dione and the dimethylamino systems are therefore coplanar. The C-C-C angle formed by the gem-dimethyl groups is 110.3 (1)degrees and the C-C-C-O torsion angles which they form with the carbonyl O atoms have magnitudes of 61.6 (1) and 61.3 (1)degrees. The C=O distances are 1.217 (2) and 1.210 (2) Angstrom. The N-methyl groups lying on the crystallographic mirror plane have their atoms disordered into half-populated positions. The N-C(methyl) distances are 1.432 (2) and 1.447 (2) Angstrom.