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(+)-樟脑与6-甲基-2-氨甲基吡啶缩合得到一种新的手性双齿配体-1,7,7-三甲基-双环[2.2.1]-2-(6'-甲基-2'-氨甲基)吡啶亚胺(1), 与二价钯生成配合物2, 晶体属P21空间群, 晶胞参数为a=10.641(2), b=10.706(2), c=11.011(2)埃; β=115.63(1)°;V=1131.15(40)埃^3; Z=2, 二价钴与1生成配合物3, 晶体属PI空间群, 晶胞参数为a=7.429(2), b=7.971(3), c=16.304(5)埃; a=80.19(3), β=77.10(2), γ=83.21(2)°; V=924.25(56)埃^3; Z=2。根据晶体数据讨论了分子的结构特征, 并对配合物的红外、紫外和核磁共振谱的变化作了解释。 相似文献
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(+)-樟脑与6-甲基-2-氨甲基吡啶缩合得到一种新的手性双齿配体-1,7,7-三甲基-双环[2.2.1]-2-(6'-甲基-2'-氨甲基)吡啶亚胺(1), 与二价钯生成配合物2, 晶体属P21空间群, 晶胞参数为a=10.641(2), b=10.706(2), c=11.011(2)埃; β=115.63(1)°;V=1131.15(40)埃^3; Z=2, 二价钴与1生成配合物3, 晶体属PI空间群, 晶胞参数为a=7.429(2), b=7.971(3), c=16.304(5)埃; a=80.19(3), β=77.10(2), γ=83.21(2)°; V=924.25(56)埃^3; Z=2。根据晶体数据讨论了分子的结构特征, 并对配合物的红外、紫外和核磁共振谱的变化作了解释。 相似文献
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以2-氨基-4-三氟甲基-5-甲基-噻吩-3-羧酸乙酯(1)为起始原料制得膦亚胺2.在碳酸钾的催化下,膦亚胺2与芳基异氰酸酯和伯二胺的氮杂Wittig反应制得嘧啶环上2,2’取代的双[噻吩并[2,3-d]嘧啶-4(3H)-酮]3;膦亚胺2与烷基异氰酸酯和伯二胺的氮杂Wittig反应制得嘧啶环上3,3’取代的双[噻吩并[2,3-d]嘧啶-4(3H)-酮]4.化合物3的核磁共振氢谱表明关环反应在嘧啶环的2,2’位;化合物4的核磁共振氢谱表明关环反应在嘧啶环的3,3’位.对合成反应机理的推导及目标产物核磁共振氢谱数据的分析解释了此合成反应的选择性. 相似文献
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以1-苯基-3-甲基-5-苯氧基-吡唑-4-甲醛和1-苯基-3-甲基-5-对甲苯氧基-吡唑-4-甲醛为原料, 在碱性条件下与苯乙酮(取代苯乙酮)发生羟醛缩合, 合成出10种新型含吡唑基的查尔酮; 再用此查尔酮与邻氨基硫酚在冰醋酸中反应, 合成了10种新的1,5-苯并硫氮杂, 化合物的结构经元素分析、IR和1H NMR确认, 同时测定了化合物6c的晶体结构. 化合物6c属单斜晶系(Monoclinic), 空间群P2(1)/n, 晶胞参数a=1.1793(2) nm, b=1.1907(2) nm, c=1.8726(4) nm, α=90°, β=104.71(3)°, γ=90°, M=522.04, V=2.5432(9) nm3, Dc=1.363 Mg/m3, Z=4, F(000)=1088. 相似文献
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含吡唑基的1,5-苯并硫氮杂衍生物的合成及晶体结构 总被引:1,自引:1,他引:0
以1-苯基-3-甲基-5-苯氧基-吡唑-4-甲醛和1-苯基-3-甲基-5-对甲苯氧基-吡唑-4-甲醛为原料,在碱性条件下与苯乙酮(取代苯乙酮)发生羟醛缩合,合成出10种新型含吡唑基的查尔酮;再用此查尔酮与邻氨基硫酚在冰醋酸中反应,合成了10种新的1,5-苯并硫氮杂,化合物的结构经元素分析、IR和1HNMR确认,同时测定了化合物6c的晶体结构.化合物6c属单斜晶系(Monoclinic),空间群P2(1)/n,晶胞参数a=1.1793(2)nm,b=1.1907(2)nm,c=1.8726(4)nm,α=90°,β=104.71(3)°,γ=90°,M=522.04,V=2.5432(9)nm3,D=1.363Mg/m3,Z=4,F(000)=1088. 相似文献
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用烯基膦亚胺与4-甲苯基异氰酸酯、对甲硫苯酚的串联aza-Wittig反应合成了2-(4-甲硫基苯氧基)-3-(4-甲苯基)-4H-咪唑啉-4-酮衍生物.探讨了反应进行的条件和产物的波谱性质,提出了可能的环化反应机理.生成的环化产物均为新的化合物,其结构经元素分析、IR、1H NMR和MS确证.并探讨了所合成的新型杂环化合物的生物活性,结果表明部分化合物表现出良好的抑菌活性,其中3f的活性最好,在质量分数为5×10-5浓度时,对稻瘟菌和苹果轮纹菌的抑制率均达到100%. 相似文献
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本文报道了以(E)-1-(2-对甲苯磺酰胺基)-3-芳基丙-2-烯-1-酮(1)为底物与N-硫代丁二酰亚胺(2)通过亲电环化反应合成2-芳基-3-硫代-2,3-二氢喹啉-4(1H)-酮类化合物。以三氟化硼乙醚为催化剂(20 mol %),1,2-二氯乙烷为溶剂,反应温度为60 oC,可以60-92%的收率得到一系列2-芳基-3-硫代-4(1H)-喹啉酮衍生物,化合物3a-k均未见文献报道,其结构均经过1H NMR, 13C NMR以及高分辨质谱进行确定。 相似文献
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AnticoagulationfactorI (ACFI)fromthevenomofAgki strodonacutusisabindingproteintoactivatedcoagulationfac torX (FXa)andpossessesmarkedanticoagulantactivity .Sin gleACFImoleculehasbeensuccessfullyimagedinairbytap pingmodeatomicforcemicroscopy (AFM )withhigh res… 相似文献
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García-Vela A Cabanillas-Vidosa I Ferrero JC Pino GA 《Physical chemistry chemical physics : PCCP》2012,14(16):5570-5580
The low-energy collisions of I(2)(B,v' = 21) with He involving collision-induced vibrational relaxation of I(2) are investigated both experimentally and by means of wave packet simulations. The theoretical cross sections exhibit a structure of peaks originated by orbiting resonances of the I(2)(B,v' = 21) - He van der Waals complex formed in the I(2) + He collisions. Such a structure has similar characteristics as the structure of peaks found in the experimental cross sections. In fact, four of the five peaks of the measured cross sections appear at positions nearly coincident with those of four of the peaks found in the theoretical cross sections. Thus this result confirms the experimental finding that enhancement of I(2) vibrational relaxation is caused by the population of I(2)(B,v' = 21) - He orbiting resonances populated upon the low-energy collisions. The possibility of using this mechanism in the vibrational cooling of diatomic molecules is discussed. 相似文献
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Shuji Noguchi Keiko Miura Sadahiro Fujiki Yasunori Iwao Shigeru Itai 《Acta Crystallographica. Section C, Structural Chemistry》2012,68(2):o41-o44
The structure of the metastable form I polymorph of the macrolide antibiotic clarithromycin, C38H69NO13, was determined by a powder diffraction method using synchrotron radiation. The space group of form I is P21212. The initial model was determined by a molecular replacement method using the structure of clarithromycin form 0 as a search model, and the final structure was obtained through Rietveld refinements. In the form I crystal structure, the clarithromycin molecules are aligned parallel along the a axis in a head‐to‐tail manner with intermolecular hydrogen bonds between the hydroxy O atoms. The dimethylamine groups of the clarithromycin molecule interdigitate between neighbouring head‐to‐tail clarithromycin alignments. The novel crystal packing found in form I provides a mechanism that describes the transformation of form 0 to form I. 相似文献
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Crystal and Molecular Structure of Tris(1,1-diethyl-3-benzoylthiourea)silver(I) Hydrogensulfide . The crystal structure of tris(1,1-diethyl-3-benzoylthiourea)silver(I) hydrogensulfide has been determined by X-ray crystal structure analysis. The substance crystallizes monoclinic, space group P21/n with a = 8.181, b = 20.216, c = 25.035 Å, β = 98.21° and 4 formula units per unit cell. The structure was solved by heavy atom technique and refined to a final R value of R = 0.046. Silver(I) does not form a chelate with the ligand 1,1-diethyl-3-benzoylthiourea. Three molecules of the ligand coordinate monodentately via the S atoms while a fourth coordination position is occupied by a hydrogensulfide ion. The coordination polyhedron is a distorted tetrahedron. 相似文献
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Yang S Troyanov SI Popov AA Krause M Dunsch L 《Journal of the American Chemical Society》2006,128(51):16733-16739
The high-yield synthesis of Dy3N@C80 (I) opens the possibility of characterizing its molecular and vibrational structures. We report on the structure determination of Dy3N@C80 (I) by X-ray crystallographic study of single crystal of Dy3N@C80.Ni(OEP).2C6H6, revealing a nearly planar Dy3N cluster encapsulated in an Ih-C80 cage. The vibrational structure of Dy3N@C80 (I) is studied by Fourier transform infrared (FTIR) and Raman spectroscopy in combination with force-field calculations. A correlation was found between the antisymmetric metal-nitrogen stretching vibration and the structure of the M3N cluster of M3N@C80 (I) (M = Y, Gd, Tb, Dy, Ho, Er, Tm). Moreover, a stronger interaction between the encaged nitride cluster and the C80 carbon cage was found in the class II M3N@C80 (I) (M = Y, Gd, Tb, Dy, Ho, Er, Tm) than in Sc3N@C80 (I). This study demonstrates that the cluster size plays the dominating role in the structure of the M3N cluster in M3N@C80 (I). 相似文献
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Bykov M. V. Abramov Z. D. Pakhomova M. V. Borodina T. N. Smirnov V. I. Suslov D. S. 《Journal of Structural Chemistry》2022,63(1):125-139
Journal of Structural Chemistry - The structure of complex [Pd(acac){P(NEt2)3}2]BF4 (I) is determined by XRD. In the crystal structure of I, the coordination sphere of palladium is characterized by... 相似文献
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Abstract— The structure of one of the dithymine adducts formed by near-UV photosensitization of aqueous oxygenated thymine in the presence of 2-methyl- 1, 4-naphthoquinone is reported. The compound, 6'β-hydroxy-5'β-1 - [5-methylpyrimidinyl- 2,4-dione]-5'-6'-dihydrothymine has one thymine ring (ring I) linked through the 1-nitrogen atom to the C5' atom of a second thymine, which has been hydroxylated af C6' (ring II). Crystals are monoclinic, space group 12/c, and the structure was refined to Robs = 0.036 for 2072 unique reflections with intensities I greater than 2.33(I). Ring I is planar, whereas ring II is not. Ring I and the OH group on ring II are cis to ring II. The planar ring I and the OH group are attached, respectively, in an equatorial and axial manner to ring II (which is in the sofa conformation). The planar rings I of close-lying pairs of molecules stack parallel to each other. The structure is held together by a hydrogen-bonding system consisting of the water molecules, the NH groups, two of the C=O groups and the OH group. The chemical formula and relative configurations at C5' and C6 are established by this analysis. 相似文献
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Hong-Zheng Chen Mang Wang Shi-Lin Yang 《Journal of polymer science. Part A, Polymer chemistry》1997,35(1):91-95
A novel polymer with quasi-one-dimensional structure of 4,4′-diamino-diphenyl ether bridged polymeric silicon phthalocyanine ( I ) is synthesized by the condensation polymerization of 4,4′-diamino-diphenyl ether (DDE) monomer and dichloride silicon phthalocyanine (Cl2SiPc) monomer. The structure of the polymer ( I ) is identified by IR subtraction and UV/VIS spectroscopy and elemental analysis. The photoconductivity of the polymer I with quasi-one-dimensional structure is better than that of not only the parent Cl2SiPc reactant, but also other polymeric phthalocyanines without one-dimensional structures, and showing one-dimensional effect of molecular structure. © 1997 John Wiley & Sons, Inc. 相似文献
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《Chemical physics letters》1987,133(2):176-178
The electric field effect on the transition of the liquid-crystalline blue phase I(BP I) to the cholesteric phase has been investigated. This field-induced transition can be overvoltaged. This effect is equivalent to the BP I supercooling and is caused by a kinetic hindrance of the molecular rearrangement within the cubic BP I structure. 相似文献