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The crystal structure of the title compound (C 20 H 20 O 4, M r =324.36) has been determined by single crystal X ray diffraction. The crystal is monoclinic with space group P2 1/c, a=9.506(1), b=14.499(9), c=12.077(1) , β=93.55(3)°, V=1661.3(3) 3, Z=4, D c =1.297g/cm 3, λ=0.71073 , μ (Mo Kα )=0^090mm -1 , F (000)=688. The structrue was refined to R=0.0516, wR(F 2 )=0^1266 for 2947 reflections with I > 2σ(I). X ray diffraction analysis reveals that the title compound is a pseudo|dimer of benzofuran and there is a chiral carbon atom which causes the two neighbor hydrogen atoms magnetically nonequivalent.
The crystal structure of the title compound (C 20 H 20 O 4, M r = 324.36) has been determined by single crystal X-ray diffraction. The crystal is monoclinic with space group P2 1 / c, a = 9.506 = 14.499 (9), c = 12.077 (1) β, β = 93.55 (3) °, V = 1661.3 (3) 3, Z = 4, D c = 1.297 g / cm 3, (Mo Kα) = 0 ^ 090 mm -1, F (000) = 688. The structrue was refined to R = 0.0516 and wR (F 2) = 0 1266 for 2947 reflections with I> 2σ X ray diffraction analysis reveals that the title compound is a pseudo | dimer of benzofuran and there is a chiral carbon atom which causes the two neighbor hydrogen atom magnetically nonequivalent.