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WANG Yu-huan WANG Guo-jia ZHANG Wei-ge DU BO FANG BO-yan YU Gui CHENG Yue-mei 《高等学校化学研究》1994,10(3):266-271
Synthesesof3-Methyl-1-propyl-4-piperidoneand1-Methyl-3,7-dipropyl-3,7-diazabicyclo[3,3,1]nonan-9-oneWANGYu-huan,WANGGuo-jia,Z... 相似文献
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CrystalandMolecularStructureofN-Isopropyl-O-(p-Chlorophenyl)-O'-(1,2:3,4-Di-O"-isopropylidene-α-D-galactopyranosyl)Thiophosph... 相似文献
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CrystalStructureofO,O-Diethyl-α-(β-triphenylgermanyl)-propionoyloxyMethylphosphonateChenRu-Yu;MaoLi-Juan;LiuAi-Lin(Instituteo... 相似文献
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CrystalStructureofO,O-Diethyl-(α-p-Hydroxyphenyl-β-Nitroethyl)phosphonateZhangXin(DepartmentofChemistry,TianjinEducationColle... 相似文献
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SUN Jun quan 《高等学校化学研究》1997,13(4):344-349
ThePolymerizationofMethylMethacrylatewithaNewNd(O—i┐Pr)3—AI(i┐Bu)3CatalystSystem*SUNJun-quan(Dept.ofPolym.Sci.andEnginering,Z... 相似文献
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CrystalandMolecularStructureof3,4-diphenyl-5-ethyl-5-methyl-1,3,4-diazaphospholidin-2-thione-4-oxide¥FengKe-Sheng;ChenRu-Yu(I... 相似文献
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标题化合物C23H26O4是由水杨醛与5,5-二甲基-1,3-环己二酮在N,N-二甲基甲酰胺中反应而得.结构通过单晶X-射线行射法确定,其晶体属于单料晶系,空间群P21/c,a=7.056(7),b=20.263(3),c=13.665(2)A,β=93.32(1)°,V=1950.7(4)A3,Mr=366.46,Dc=1.248g/cm3,Z=4,μ(MoKa)=0.84cm-1,F(000)=784。晶体结构用直接法解出,经全矩阵最小二乘法对原子参数进行修正,最后的偏离因子R=0.068,Rw=0.075。晶体结构分析结果表明,分子中存在一个共轭的烯醇式结构。 相似文献
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标题化合物C24H30O5是由邻甲氧基苯甲醛与5,5-二甲基-1,3-环己二酮在N,N-二甲基甲酰胺中反应而得。结构通过单晶X-射线衍射法确定,其晶体属于单斜晶系,空间群C2/c,a=33.942(6),b=7273(1),c=22667(4)A,β=128.989(9)°,Mr=398.50,V=4349(1)A3,Dc=1.2179·cm-3,Z=8,μ(MoKa)=840mm-1,F(000)=1712。晶体结构用直接法解出,经用全矩阵最小二乘法对原子参数进行修正,最后的偏离因子为R=0.043,Rw=0.052。在晶体结构中,存在一个分子间氢键。 相似文献
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WANG Hong-Li XU Wen-Yuan WANG Ding-Li ZHANG Bin WU Hong 《结构化学》2007,26(6):691-694
The title compound {4-[2-(9-hexyl-9H-carbazol-3-yl)vinyl]phenyl} dimethylamine has been synthesized by the well known Wittig reaction, and its crystal structure was determined by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 47.87(2), b = 10.222(4), c = 9.612(4) , β = 92.401(9)o, V = 4699(3) 3, Z = 8, C28H32N2, Mr = 396.56, Dc = 1.121 g/cm3, F(000) = 1712 and μ(MoKa) = 0.065 mm-1. The final R and wR are 0.0793 and 0.1983, respectively for 3524 observed reflections with I > 2σ(I). In the title compound, the bond lengths are normal, and the crystal is stabilized by Van der Waals’ forces. 相似文献
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1 INTRODUCTION The title compound bis-9-fluorenylmethyl- phenyl silane is an intermediate to synthesize the rare earth organometallic complexes containing silylene-bridged ligand. It was synthesized from fluorenyl lithium reacting with dichlorine (methyl) phenylsilane. In this experiment, however, a new method was taken. In the first step fluorenyl lithium was prepared from fluorene reacting with metal lithium directly instead of with n-butyllithium, which not only reduces the by-produc… 相似文献
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本文报告用单晶X-射线衍射法测定[Nd_2O(C-5H_5)_6](C_(12)H_9N_2)_3C1·mC_4H_5O的晶体结构。晶体属于单斜晶系,空间群为P2-1/c,晶胞参数为a=20.982(15),b=11.217(7),c=32.954(32),β=104.17(7)°;Z=4。Nd和C1原子坐标用直接法定出,其他原子坐标以差Fourier方法求得,经过最小二乘法修正,R因子为0.159。在分子中三个茂环皆通过η~5。键与Nd原子配位,两个Nd原子间存在桥氧原子,因而形成(Nd_2O(C_5H_5)_6)~(2-)阴离子,Nd-C键基本上属于离子键。三个邻菲罗啉基团通过氢键与C1原子连接形成大的阳离子[(C_(12)H_9N_2)3-C1]~(2+)。 相似文献
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CrystalStructureof1,2:5,6-Di-O-isopropylidene-α-D-glucofuranosylN,N-bis(2-chloroethyl)PhosphordiamidateChenRu-Yu;ChenXiao-Ru(... 相似文献
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1 INTRODUCTION Since the discovery of pharmacological effectsof 1,4-Dihydropyridine (1,4-DHPs) as calcium chan-nel modulators[1], a great deal of work has been di-rected towards the synthesis of novel 1,4-DHPs ac-ting as calcium antagonists[2]. Researches on the syn-theses and structures of such compounds have attrac-ted the attention of many chemists. People hope to obtain materials with differentbiological activities through chemical modificationon the pyridine ring, e.g., introducing… 相似文献
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1 INTRODUCTION Over the past decades, extensive work has been carried out to study palladium complexes in organic synthesis, structural analysis, chemical reactivity, catalytic process, spectroscopy and functional mate- rials[1]. Especially the anti… 相似文献
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长管香茶菜B(LongikaurinB)分子的化学计量式为C22H30O7,Mr=406.47,用X射线衍射法确定其晶体结构,该结晶是无色透明柱状,属单斜晶系,空间和群为P21,晶胞参数:a=11.893(2),b=6.380(2),c=13.205(2)A,β=99.39(2)°,Z=2,V=988.5(4)A3,Dc=1.366g/cm3,F(000)=436,u=0.9cm-1。应用直接法解析分子结构,以最小二乘法修正结构参数。最终可靠因子R=0.042,Ra=0.043。结果表明,该化合物为长管香茶菜B,属7,20-氧桥-对映-贝壳杉烯型工花化合物。结构与功能关系研究表明LongikaurinB化合物可能具有抗肿瘤生物活性。 相似文献