| 6-对硝基苯基-2-环己烯酸和6-对甲氧苯基-2-环己烯酸的合成和晶体结构 |
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| 引用本文： | 梁栋材,李密,刘成国,黄锦珂,钟增培,丘茹惠.6-对硝基苯基-2-环己烯酸和6-对甲氧苯基-2-环己烯酸的合成和晶体结构[J].结构化学,1988(4). |
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| 作者姓名： | 梁栋材 李密 刘成国 黄锦珂 钟增培 丘茹惠 |
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| 作者单位： | 中国科学院生物物理所
(梁栋材，李密，刘成国)，中山大学化学系
(黄锦珂，钟增培)，中山大学化学系(丘茹惠) |
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| 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=80.40,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。
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Syntheses and Structures of 6-Nitrophenyl-2-cyclohexenyl Acid and 6-Methoxyphenyl-2-cyclohexenyl Acid |
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| Abstract: | 6-p-Nitrophenyl-2-cyclohexenyl acid ( molecule(1) ) crystalizes in triclinic, space group P1 with lattice parameters a = 10.300 6 = 8,062, c = 7.804A,α= 71.39,β=80.40,γ=74.77°,and Z=2.6-Methoxyphenyl-2-cyclohexenyl acid (molecule (2) ) crystalizes in monoclinic, space group P21/c with lattice parameters a = 16.550,b= 5.583, c = 14.600A,β= 116.0°,and Z = 4. Their structures are solved by direct methods and Fourier synthesis and refined by least-squares method. The final R values are 0.073 for molecule (1) and 0.048 for molecule (2). Based on the results, the reactivity of cyclic addition and regioselectivity are discussed. |
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