排序方式: 共有18条查询结果,搜索用时 203 毫秒
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4,6-二叔丁基-2-氯甲基苯酚(1Bu2-1-(HO)C6H2CH2Cl)与1-(2-羟基3,5-二叔丁基1-苄基)咪唑(2-HO-3,5-di-1Bu-C6H2-CH2{CH(NCHCHN)})反应首次成功地合成双功能化的氮杂环卡宾前体1,3-(2-羟基-3,5-二叔丁基苄基)咪唑筠氯盐([[2-HO-3,5-di-1Bu-C6H2-CH2]2{CH(NCHCHN)}]Cl)1,化合物1通过元素分析,1HNMR和X-ray衍射进行表征.晶体结构表明其晶体属三斜晶系,空间群为P-1,化学式为C37,H55ClN4O2,晶胞参数为a=11.94(4)A,b=16.57(7)A,c=19.11(7)A,a(deg)=94.24(14)deg,β(deg)=92.63(14)(3)deg,γ(deg)=92.52(14)deg,V(A3)=3764(24)A3,Z=4,最终R=0.1565,wR=0.1660. 相似文献
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4,6-tBu2-1-(HO)C6H2CH2Cl与1,1'-羰基二咪唑反应成功地合成双阴离子芳氧功能化的氮杂环卡宾前体[[2-HO-3,5-tBu2-C6H2CH2]2{CH(NCHCHN)}]CI(I),结果表明在反应过程中发生了断裂反应。化合物I通过元素分析,1HNMR和X-ray衍射进行表征。晶体结构表明其晶体属三斜晶系,空间群为P-1,化学式为C33H49ClN2O2,晶胞参数为a=12.014(3),b=16.757(3),c=19.191(4),α=94.836(4)deg,β=92.658(4)deg,γ=92.631(4)deg,V=3840.8(14)3,Z=2,最终R=0.092,wR=0.291。 相似文献
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桥联杂环卡宾前体[CH3CH(NCHCHN)CH2]2Br2的合成 总被引:1,自引:0,他引:1
甲基咪唑与1,2-二溴乙烷在THF(四氢呋喃)中以2∶1(摩尔比)反应合成了一种新型桥联氮杂环卡宾前体[CH3CH(NCHCHN)CH2]2Br-2,产物通过核磁和X射线衍射表征.晶体结构显示其晶体属单斜晶系P21/c,a=0.847 5(3) nm,b=0.891 6(3) nm,c=0.923 4(3) nm,α=90°,β=108.214°,γ=90°,V=0.662 8(4) nm3,Z=2,Dc=1.764 mg/m3,μ=6.097 mm-1,F(000)=348.产物分子结构中存在的大量氢键是其形成空间网状结构的主要原因. 相似文献
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通过亲核反应合成了芳氧功能化的氮杂环卡宾前体[HO-4,6-di-C(CH3)3-C6H2-2-CH2{CH(NCHCHN)CH3}]Cl(1),1再与正丁基锂(n-BuLi)按照摩尔比2∶1常温反应生成芳氧功能化的氮杂环卡宾迁移产物[O-4,6-di-tBu-C6H2-2-CH2{C(MeNCHCHNH)}]2Li2(THF)2(2).化合物1和2均通过核磁、元素分析和X射线衍射表征.晶体结构显示化合物1属单斜晶系,空间群为C2/c,化学式为C19H29ClN2O,晶胞参数a=3.203 4(14) nm,b=0.863 0(4) nm,c=1.469 5(7) nm,α=90 °,β=106.305(10) °,γ=90 °,V=3.899(3) nm3,Z=8,R=0.170 5, wR=0.176 6.化合物2也属三斜晶系P1,a=0.942 64(13) nm,b=0.987 21(15) nm,c=1.405 58(16) nm,α=79.040(10)°,β=73.928(9)°,γ=85.804(11)°,V=1.233 7(3)nm3,Z=1,Dc=1.116 mg/m3,μ=0.070 mm-1,F(000)= 452.同时,发现温度是影响氮杂环卡宾迁移的主要原因. 相似文献
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The title complex [Ag(carbene)2]2[Ag2Br4] has been synthesized by the reaction of Ag2O with 1-ethyl-3-benyl-imidazolium bromide in DMSO at room temperature, and characterized by elemental analysis, 1H NMR and single-crystal X-ray diffraction analysis. It crystallizes in triclinic, space group P with a = 10.1597(10), b =11.0646(11), c = 13.0245(14) , α = 102.230(2), β = 90.606, γ = 113.9250(10)o, V = 1300.3(2) 3, Mr = 748.06, Z = 2, Dc = 1.911 g/cm3, μ(MoKα) = 4.60 mm-1 and F(000) = 728. The structure was refined to R = 0.0316 and wR = 0.0835 for 3744 observed reflections with I > 2σ(I). The title compound crystallizes as a centrosymmetric tetranuclear compound. One half of the molecule comprises the asymmetric unit of the structure. The Ag(1) atom is nearly linear or T-shaped when the Ag(1)-Ag(2) interaction is taken into consideration, which is bi-coordinated by two carbene carbon atoms. The Ag(2) atom adopts tetrahedral geometry. The catalytic behavior of the title complex has been investigated, and the results indicate it has a highly catalytic activation for L-lactide polymerization. 相似文献
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