【摘 要】
：
X射线衍射法测定了6-对硝基苯基-2-环己烯酸(1)和6-对甲氧苯基-2-环已烯酸(2)的晶体结构。晶体(1)属三斜晶系,空间群为P1,晶胞参数a=10.300,b=8.062,c=7.804A,α=71.39,β=80
【机 构】
：
中国科学院生物物理所,中国科学院生物物理所,中国科学院生物物理所,中山大学化学系,中山大学化学系,中山大学化学系
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X射线衍射法测定了6-对硝基苯基-2-环己烯酸(1)和6-对甲氧苯基-2-环已烯酸(2)的晶体结构。晶体(1)属三斜晶系,空间群为P1,晶胞参数a=10.300,b=8.062,c=7.804A,α=71.39,β=80.40,γ=74.77°,Z=2,偏离因子R=0.073。晶体(2)属单斜晶系,空间群为P2_1/c,晶胞参数a=16.550,b=5.583,c=14.600A,β=116.0°Z=4,偏离因子R=0.048。根据实验结果对成环加成反应的活性和区域选择性进行了讨论。
The crystal structures of 6-p-nitrophenyl-2-cyclohexenoic acid (1) and 6-p-methoxyphenyl-2-cyclohexenoic acid (2) were determined by X-ray diffractometry. The crystal (1) belongs to the triclinic system with the space group P1 and the unit cell parameters a = 10.300, b = 8.062, c = 7.804A, α = 71.39, β = 80.40, γ = 74.77 °, Z = R = 0.073. Crystal (2) belongs to monoclinic system with space group P2_1 / c. The unit cell parameters a = 16.550, b = 5.583, c = 14.600A, β = 116.0 ° Z = 4 and the deviation factor R = 0.048. The activity and regioselectivities of the cycloaddition reaction were discussed based on the experimental results.
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