The crystal structure of 2,3-benzo-1,4,7,13-tetraoxa-10-selenacyclopentadeca-2-ene was de- termined,C_(14)H_(20)O_4Se,M_r:331.27,orthorhombic,Pbca,a=18.445(3),b=16.334(4),c9.232(2) ,V=2781.3 ~3,Z=8,Dx=1.582 Mg m^(-3),...The crystal structure of 2,3-benzo-1,4,7,13-tetraoxa-10-selenacyclopentadeca-2-ene was de- termined,C_(14)H_(20)O_4Se,M_r:331.27,orthorhombic,Pbca,a=18.445(3),b=16.334(4),c9.232(2) ,V=2781.3 ~3,Z=8,Dx=1.582 Mg m^(-3),λ(Mo K_α)=0.71073 ,μ=26.77 cm^(-1),F(000)=1360, T=297 K,R=0.0329,R_w=0.0438 for 2192 reflections with I>3 σ(I).The crystal structure is closely related to that of benzo-15-crown-5(at 123 K),whereas the molecular geometry of the two coronands is different according to their torsion angles calculated and the shapes exhibited.展开更多
文摘The crystal structure of 2,3-benzo-1,4,7,13-tetraoxa-10-selenacyclopentadeca-2-ene was de- termined,C_(14)H_(20)O_4Se,M_r:331.27,orthorhombic,Pbca,a=18.445(3),b=16.334(4),c9.232(2) ,V=2781.3 ~3,Z=8,Dx=1.582 Mg m^(-3),λ(Mo K_α)=0.71073 ,μ=26.77 cm^(-1),F(000)=1360, T=297 K,R=0.0329,R_w=0.0438 for 2192 reflections with I>3 σ(I).The crystal structure is closely related to that of benzo-15-crown-5(at 123 K),whereas the molecular geometry of the two coronands is different according to their torsion angles calculated and the shapes exhibited.
