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The title compound 9-(2-hydroxy-5-nitrophenyl)-9H-dibenzo[c,h]-2,7,10-trioxan-thene-1,8-dione DMF solvate (C28H20N2O9,Mr=528.46) was synthesized and crystallized.The crystal belongs to the triclinic system,space group P1 with a=10.210(3),b=10.698(4),c=12.522(4),α=92.214(6),β=113.751(5),γ=105.040(5)°,Z=2,V=1193.0(7)3,Dc=1.471 g·cm-3,μ(MoKα)=0.112 mm-1,F(000)=548,R=0.0444 and wR=0.1141 for 2667 observed reflections (I > 2σ(I)).X-ray analysis reveals that atoms C(1),C(2),C(3),C(4),C(5) and O(1) on the new 4H-pyran ring are slightly distorted,forming a half-chair conformation.
The title compound was synthesized from the title compound 9- (2-hydroxy-5-nitrophenyl) -9H- dibenzo [c, h] -2,7,10-trioxan-thene- 1,8- dione DMF solvate (C28H20N2O9, Mr = 528.46) and crystallized.The crystal belongs to the triclinic system, space group P1 with a = 10.210 (3), b = 10.698 (4), c = 12.522 (4) , α = 92.214 (6), β = 113.751 (5) , γ = 105.040 (5) °, Z = 2, V = 1193.0 (7) 3, Dc = 1.471 g · cm -3, μ (MoKα) = 0.112 mm- 0.0444 and wR = 0.1141 for 2667 observed reflections (I> 2σ (I)). X-ray analysis reveals that the atoms C (1), C (2), C O (1) on the new 4H-pyran ring are slightly distorted, forming a half-chair conformation.