Crystal Structure of 3,3,6,6-Tetramethyl-9-(4-pyridyl)-3,4,5,6-tetrahydro-1,8(2H,5H)-acridinedione

Abstract

The title compound, “3,3,6,6-tetramethyl-9-pyridyl-3,4,5,6-tetrahydroacridine-1,8(2H,5H)-dione” crystallized in an orthorhombic space group, Pbcn, with cell parameters a = 6.0581(5), b = 19.0837(16), c = 16.4145(14)Å, V = 1897.7(3)ų, D_x = 1.220 Mg/m³. The structure was refined to final R = 0.054 using 1826 observed reflections. The molecule occupies a two-fold axis passing through N1, C5, C6 and N2 atoms. The outer cyclohexane rings adopt a conformation intermediate between a half chair and a sofa. The crystal packing is stabilized by van der Waals interactions.