Abstract

C₂₀H₁₇NO₅, triclinic, PI (no. 2), a = 6.633(5) A , b = 8.694(5) A, c = 16.758(5) A , a = 76.169(5)°, P = 83.423(5)°, y = 68.016(5)°, V = 869.8 A^{​° 3}, Z = 2, R_gt(F) = 0.061, wR_ref(F²) = 0.176, T= 293 K. 115.3(2)°, Z.C6-05-C7 = 116.4(2)°, ¿C1-N-C2 = 118.2(1)°, ¿Cl-N-C14 = 126.4(1)°, ¿01-C1-N= 120.1(1)°, ¿C3-C2-C5 = 112.2(1)°, Z.02-C3-03 = 124.3(2)°, ZC6-C5-C8 = 123.6(2)°, Z.04-C6-05 = 123.79(2)°, ZC5-C8-C9 = 120.8(1)°. They are similar to the previous reports [2-9], The methyl groups at 03 and 0 5 are approximately in the 03-C3-02 (ZC4-03-C3-02 = -1.5(3)°) and 05-C6-04 (¿C7-05-C6-04 = -3.4(3)°) planes, respectively, that agree well with participation of 03 and 05 in the electron donation to the carbonyl groups. The torsion angle ZC8-C5-C6-04 (164.53(18)°) shows that the carbonyl group (C6-04) and C5=C8 double bond share approximately a common plane with S-trans conformation, probably as a result of Jtsystems conjugations. jr-TT-ring stacking is observed within the crystals, probably as a result of the presence of parallel aromatic rings (benzoyl rings) that stabilize the crystal packing.