顺式-四氢环丁烷[1,2-b:3,4-b′]骈二吡啶-四羧酸乙酯的合成及晶体结构

Synthesis and crystal structure of syn-tetrahydrocyclobuta [1,2-b:3,4-b′] dipydine-tetracarboxylate

研究了由3,5-二羧酸乙酯-1,4-二氢吡啶光二聚合成顺式二聚体的反应,培养出了顺式二聚体的单晶,并表征了单晶的晶体结构.结果表明,合成的顺式二聚体晶体为单斜晶系,空间群P2(1)/c,晶胞参数为:a=1.193 7(2)nm,b=2.091 3(4)nm,c=0.976 3(2)nm,α=90.00°,β=108.46(3)°,γ=90.00°,V=2.311 9(8)nm3,Z=4,μ=0.099mm-1.

The synthesis of syn-photodimer from diethyl 1,4-dihydropyridine-3,5-dicarboxylate was studied. Single crystal syn-photodimer was obtained, and its erystal structure was eharac- terized. Results indicate that as-synthesized syn-photodimer crystallizes in monoclinic system of P2（1）/c space group, with cell parameters of α = 1. 193 7（2） nm, b = 2. 091 3（4） nm, c = 0. 976 3（2） nm, α = 90.00°, β = 108.46（3）°, γ = 90.00°, V = 2. 311 9（8） nm3, Z = 4, and /l = O. 099 mm-1.