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N-[2-(4-chlorophenyl)-1-(1-methylcarbamoyl-2-phenyl-ethylcarbamoyl)-3-phenyl-cyclopropyl]benzamide,C33H30ClN3O3,has been synthesized and characterized by IR,1H NMR,13C NMR and single-crystal X-ray diffraction.The crystal is of triclinic,space group P1 with a = 11.646(2),b = 13.795(3),c = 14.559(3),α = 76.422(4),β = 78.028(4),γ = 74.500(4)°,V = 2164.6(7)3,Z = 3,Mr = 552.05,Dc = 1.270 g/cm3,λ = 0.71073 ,μ(MoKα)= 0.171 mm–1,F(000)= 870,the final R = 0.0469 and wR = 0.0805 for 5554 observed reflections with I > 2σ(I).The N–H and oxygen atoms are involved in one-dimensional intermolecular hydrogen bonds,which further stabilize the structure. 相似文献
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2-(4-Decarboxydehydroabietyl)-5-p-toyl-[1,3,4]-oxadiazole, C28H34N2O, has been synthesized and characterized by IR, NMR, elemental analysis and single-crystal X-ray diffraction method. The crystal belongs to the orthorhombic system, space group P212121 with a = 6.1351(5), b = 14.8495(19), c = 25.9050(2) A, V = 2360.0(4) A3, Z = 4, Mr = 414.57, Dc = 1.167 Mg/m^3, 2 = 0.71073 A,μ(MoKa) = 0.070 mm^-1, F(000) = 896, the final R = 0.0452 and wR = 0.1076 for 1647 observed reflections with I 〉 2σ(I). There are five rings in the crystal structure of the title compound, but the oxadiazole ring is non-coplanar with the benzene ring D. 相似文献
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用水杨酸和间甲酚为原料,在三氯氧磷和氯化锌的作用下合成了(4-羟基-2-甲基苯基)(2-羟基苯基)甲酮(C14H12O3),通过IR、NMR、元素分析、X射线单晶衍射等手段对化合物进行了结构表征.该晶体属于单斜晶系,空间群为P2(1)/n,晶胞参数为:a=1.09534(10),b=0.84616(6),c=1.30458(19)nm,α=γ=90°, β=109.584 (2)°, V=1. 139 2(2) nm^3, Z=4, Mr =228.24, Dc =1.331 g/cm^3, μ=0.093 mm^-1, F (000) =480,羟基和羰基中的氧原子所形成的分子问氢键把分子连接成一维链.该化合物在240~360nm之间有强烈的紫外吸收. 相似文献
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N-[1-(2-Methyl-1-methylcarbamoyl-propylcarbamoyl)-2,3-diphenyl-cyclopropyl]-ben- zamide, C29H31N3O3, has been synthesized and characterized by IR, ^1H NMR, ^13C NMR and singlecrystal X-ray diffraction. The crystal is of orthorhombic, space group P212121 with a = 11.0855(11), b = 18.7756(19), c = 24.434(2)A, V = 5085.5(9)A^3, Z = 8, Mr = 469.57, Dc = 1.227 g/cm^3, λ = 0.71070 A,μ(MoKα) = 0.080 mm^-1, F(000) = 2000, the final R = 0.0579 and wR = 0.1111 for 4569 observed reflections with I 〉 2σ(I). The N-H and oxygen atom are involved in intermolecular hydrogen bonds which link the molecules into a one-dimensional chain. 相似文献
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用全息光学元件实现对眼睛的激光防护 总被引:6,自引:0,他引:6
反射式全息滤光片具有很好的滤光特性,可作为一种激光防护元件.本文对这种元件的波长选择性,角度选择性,所能承受的功率密度进行分析,并讨论了实际应用的可能性. 相似文献
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反射式全息滤光片背景噪声的抑制 总被引:1,自引:0,他引:1
与传统的干涉滤光片相比,背景噪声高是全息滤光片的主要缺点.本文介绍了用倾斜条纹抑制全息滤光片背景噪声的方法,可以收到较好的效果. 相似文献
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惠更斯-菲涅耳原理是光学中解决衍射问题的基本原理,它是作为假设提出来的,数学表达式为其中∑是衍射孔,U0(P1)是光源照到衍射屏上的复振幅,K(θ)为倾斜因子,k为波数,r是观察点P到衍射孔∑上P1点的距离.为了搞清公式(1)的适用条件,下面给出建立在电磁场理论基础上的基尔霍夫衍射公式. 基尔霍夫在波动方程和格林定理的基础上,取由观察点发出的单位振幅球面波的复振幅函数为格林函数,得到了基尔霍夫积分定理[1]公式(2)表示,观察点P的复振幅U(P)可以由包围该点的任一闭合面上的复振幅U0和 U0。。、.、。t.。。。。。,OU。。、,,。对闭合面… 相似文献