Crystal Structure of 4-(4-chlorophenyl)-7,7-dimethyl-2,5- dioxo-1,2,3,4,5,6,7,8-octahydroquinoline

The crystal structure of the title compound (C17H18ClNO2) has been determined by single-crystal X-ray diffraction. The crystal is monoclinic with space group C2/c, a=23.677(5), b=9.5333(2), c=14.027(3)? b=98.06(3), V=313.5(1)?, Mr=303.77, Z=8, Dc=1.287g/cm3, l=0.71073, m(MoKa)=0.247mm-1, F(000)=1280. The structure was refined to R=0.0600, wR=0.1959 for 2020 reflections with I2s(I). X-ray analysis reveals that the dihedral angle between plane 1 [C(1)~C(6)] and plane 2 [N(1), C(10), C(11), C(7)] is 78.8(1) , between plane 2 and plane 3 [C(10), C(11), C(12), C(13), C(15)] is 3.95(7) .