Studies on Heteromacrocyclic Polyether (X) Synthesis and Structural Characterization of 2, 3, 11, 12-Dibenzo-1, 4, 10, 13-tetraselena-7, 16-dioxacyclooctadeca-2, 11-diene  

作　　者：胡盛志 李卫平 等 

机构地区：[1]DepartmentofChemistry,XiamenUniversity,Xiamen36100 [2]DepartmentofChemistry,XiamenU

出　　处：《Chinese Journal of Structural Chemistry》1995年第4期267-271,共5页结构化学（英文）

摘　　要：Dibenzo-1 , 4 , 10 , 13-tetraselena-7 , 16-dioxacyclo-octadeca-2 , 11-diene was synthesized by the condensation of poly (o-diselenobenzene) with bis (2-chloroethyl) ether in the presence of potassium borohydride. The molecular structure was examined by IR, MS and ￣1H NMR spectra, and confirmed by an X-ray diffraction study. The molecule in the crystal has a centrosymmetry and shows a chair conformation. The dihedral angle between the plane containing the four Se atoms and the benzene ring is 104. 1 (2)°. All geometrical parameters of the molecule are unexceptional. Crystal data : C_20H_24O_2Se_4, M_r= 612. 26, monoclinic, space group P2_1/c, a=8. 866(2) , b=5. 349(1). c=22. 315(3) A, β=96. 04(2)°, V=1052. 3 A￣3, Z=2,D_c=1.932 g/cm￣-3 , μ(MoKα) = 69. 15 cm￣-1, F(000) = 592, T= 297K, R= 0. 038for 1270 observed reflections and 154 refined parameters.Dibenzo-1 , 4 , 10 , 13-tetraselena-7 , 16-dioxacyclo-octadeca-2 , 11-diene was synthesized by the condensation of poly (o-diselenobenzene) with bis (2-chloroethyl) ether in the presence of potassium borohydride. The molecular structure was examined by IR, MS and ￣1H NMR spectra, and confirmed by an X-ray diffraction study. The molecule in the crystal has a centrosymmetry and shows a chair conformation. The dihedral angle between the plane containing the four Se atoms and the benzene ring is 104. 1 (2)°. All geometrical parameters of the molecule are unexceptional. Crystal data : C_20H_24O_2Se_4, M_r= 612. 26, monoclinic, space group P2_1/c, a=8. 866(2) , b=5. 349(1). c=22. 315(3) A, β=96. 04(2)°, V=1052. 3 A￣3, Z=2,D_c=1.932 g/cm￣-3 , μ(MoKα) = 69. 15 cm￣-1, F(000) = 592, T= 297K, R= 0. 038for 1270 observed reflections and 154 refined parameters.

关 键 词：crown ether selenacrown ether SYNTHESIS crystal structure 

分 类 号：O627.61[理学—有机化学] O623.423[理学—化学]