引用本文:
Zheng Hua WANG, Zhao Long LI, Xiao Yin HONG. Crystal Structure of Diethyl[2,3-Di(Ethoxycarbonyl)-2, 3-di(p-nitrophenyl)] Succinate[J]. Chinese Chemical Letters,
2001, 12(12): 1131-1134.
Citation: Zheng Hua WANG, Zhao Long LI, Xiao Yin HONG. Crystal Structure of Diethyl[2,3-Di(Ethoxycarbonyl)-2, 3-di(p-nitrophenyl)] Succinate[J]. Chinese Chemical Letters, 2001, 12(12): 1131-1134.
Citation: Zheng Hua WANG, Zhao Long LI, Xiao Yin HONG. Crystal Structure of Diethyl[2,3-Di(Ethoxycarbonyl)-2, 3-di(p-nitrophenyl)] Succinate[J]. Chinese Chemical Letters, 2001, 12(12): 1131-1134.
Crystal Structure of Diethyl[2,3-Di(Ethoxycarbonyl)-2, 3-di(p-nitrophenyl)] Succinate
摘要:
A new conformational carbon-carbon bond free radical initiator diethyl [2,3-di(ethoxycarbonyl)-2,3-di(p-nitrophenyl)] succinate (EMNPS) was synthesized and identified by elemental analysis, FAB-MS, IR and 1H NMR spectroscopy. The analytical results of single crystal X-ray show the conforma-tion of EMNPS tends to be a stagger gauche form, and torsion angle of the two gauche phenyls is smaller than 60°. There is obvious elongation in central carbon-carbon bond length (0.161 nm). EMNPS can be decomposed into two relatively stable free radicals measured by ESR. By initiating bulk polymeriza-tion of methyl methacrylate (MMA), EMNPS shows the ability of controlling the molecular weight of polymers.
English
Crystal Structure of Diethyl[2,3-Di(Ethoxycarbonyl)-2, 3-di(p-nitrophenyl)] Succinate
Abstract:
A new conformational carbon-carbon bond free radical initiator diethyl [2,3-di(ethoxycarbonyl)-2,3-di(p-nitrophenyl)] succinate (EMNPS) was synthesized and identified by elemental analysis, FAB-MS, IR and 1H NMR spectroscopy. The analytical results of single crystal X-ray show the conforma-tion of EMNPS tends to be a stagger gauche form, and torsion angle of the two gauche phenyls is smaller than 60°. There is obvious elongation in central carbon-carbon bond length (0.161 nm). EMNPS can be decomposed into two relatively stable free radicals measured by ESR. By initiating bulk polymeriza-tion of methyl methacrylate (MMA), EMNPS shows the ability of controlling the molecular weight of polymers.
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