The crystal structure of the title compound （C19H13BrOs） has been detemlined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/c, with a = 10.508（4）, b = 11.354（4）, c = 14.522（5...The crystal structure of the title compound （C19H13BrOs） has been detemlined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/c, with a = 10.508（4）, b = 11.354（4）, c = 14.522（5）A, β = 106.255（4）°, V = 1663.4（10）A3, Mr = 401.20, Z = 4, Do = 1.602 g/cm^3, λ = 0.71073A, F（000） = 808,μ= 2.498 mm^-1, R = 0.0337 and wR = 0.0837 for 2200 observed reflections （1 〉 2σ（Ⅰ））. X-ray analysis reveals that the dihedral angles between planes 1 and 2, 1 and 3, 1 and 4, 2 and 3, 2 and 4, and 3 and 4 are 78.6, 82.5, 87.4, 5.6, 9.5 and 4.9°, respectively. There exists a conjugated system in the molecular structure.展开更多
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 g...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.展开更多
基金the Science and Technology Foundation of Guangdong Province (No. 031792, 06028565)
文摘The crystal structure of the title compound （C19H13BrOs） has been detemlined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/c, with a = 10.508（4）, b = 11.354（4）, c = 14.522（5）A, β = 106.255（4）°, V = 1663.4（10）A3, Mr = 401.20, Z = 4, Do = 1.602 g/cm^3, λ = 0.71073A, F（000） = 808,μ= 2.498 mm^-1, R = 0.0337 and wR = 0.0837 for 2200 observed reflections （1 〉 2σ（Ⅰ））. X-ray analysis reveals that the dihedral angles between planes 1 and 2, 1 and 3, 1 and 4, 2 and 3, 2 and 4, and 3 and 4 are 78.6, 82.5, 87.4, 5.6, 9.5 and 4.9°, respectively. There exists a conjugated system in the molecular structure.
基金supported by the National Natural Science Foundation of China (20802061)Natural Science Foundation of the Education Committee of Jiangsu Province (08KJD150019)Qinglan Project (08QLT001) of the Education Committee of Jiangsu Province
文摘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.
