摘要
The title compound 5-allyl-2,3-dihydro-9-（2-hydroxy-5-oxocyclopent-1-enyl）-cyclopenta[b]chromen-1（9H）-one monohydrate（C20H18O4.H2O,Mr = 340.36） was synthesized and crystallized.It crystallizes in the triclinic system,space group P with a = 8.5840（17）,b = 8.7027（17）,c = 11.561（2）,α = 89.69（3）,β = 74.33（3）,γ = 86.13（3）°,V = 829.6（3）（A°）^3,Z = 2,Dc = 1.363 g/cm^3,MoKa radiation（λ = 0.71073 ）,F（000） = 360,μ = 0.098 mm^-1,the final R = 0.0430 and wR = 0.1008 for 2957 observed reflections with（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 pyran ring are coplanar,which is obviously different from the half-chair or boat conformations of other similar compounds.
The title compound 5-allyl-2,3-dihydro-9-（2-hydroxy-5-oxocyclopent-1-enyl）-cyclopenta[b]chromen-1（9H）-one monohydrate（C20H18O4.H2O,Mr = 340.36） was synthesized and crystallized.It crystallizes in the triclinic system,space group P with a = 8.5840（17）,b = 8.7027（17）,c = 11.561（2）,α = 89.69（3）,β = 74.33（3）,γ = 86.13（3）°,V = 829.6（3）（A°）^3,Z = 2,Dc = 1.363 g/cm^3,MoKa radiation（λ = 0.71073 ）,F（000） = 360,μ = 0.098 mm^-1,the final R = 0.0430 and wR = 0.1008 for 2957 observed reflections with（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 pyran ring are coplanar,which is obviously different from the half-chair or boat conformations of other similar compounds.
基金
Industrialization Project (JHB2011-57) of the Education Committee of Jiangsu Province
Industrialization Project of Huaian City (HAG2010075)
