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1.
Unsymmetrical porphyrazines bearing a single peripheral bis(hydroxyethylthio) moiety were synthesised by mixed condensation of bis(2-hydroxyethylthio)maleonitrile and phthalonitrile. Complexation of the thioether groups of metal-free porphyrazine with PdCl2 further lowered the intensity of the Q-band absorption of the porphyrazine core. The new compounds were characterised by elemental analyses, IR, 1H NMR, UV-Vis, and mass spectra. 相似文献
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Rakhimov A. I. Nalesnaya A. V. Fedunov R. G. Vostrikova O. V. 《Russian Journal of General Chemistry》2004,74(5):799-800
Russian Journal of General Chemistry - 相似文献
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Summary. Unsymmetrical porphyrazines bearing a single peripheral bis(hydroxyethylthio) moiety were synthesised by mixed condensation of bis(2-hydroxyethylthio)maleonitrile and phthalonitrile. Complexation of the thioether groups of metal-free porphyrazine with PdCl2 further lowered the intensity of the Q-band absorption of the porphyrazine core. The new compounds were characterised by elemental analyses, IR, 1H NMR, UV-Vis, and mass spectra. 相似文献
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二茂基环己氧基稀土化合物的合成、分子结构和催化活性 总被引:1,自引:0,他引:1
通过Cp_3Ln(Ln=Sm, Yb)和环己醇在THF溶剂中按1:1摩匀比反应,合成了标题 化合物[Cp_2LnOC_6H_(11)]_2(Ln=Sm, Yb)。化合物经元素分析、红外光谱分析表 征。镱配合物经X单晶衍射分析。它是一个以氧原子为桥的二聚体,环己烷基呈椅 式构型,O-C(环己烷基)键处于平伏e键位置。在上述基础上,尝试了它对己内 酯的催化聚合反应,发现标题化合物对己内酯聚合具有一定的催化活性。进一步合 成了[Cp_2YbOC_6H_(11)]与己内酯的1:4预聚反应产物,发现预聚物催化己内酯聚 合活性比标题化合物大大增强,从而说明催化聚合过程中引发反应速率慢是影响标 题化合物表观催化活性的重要因素。 相似文献
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M. I. Kabachnik L. S. Zakharov E. I. Goryunov P. V. Petrovskii T. M. Schcherbina A. P. Laretina 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract The phosphorylation of tertiary alcohols can be performed only in some exceptional cases. We established, that phosphorylation of tertiary fluoroalkanols H(CF2) nCMe2OH (I, n = 2,4) with aryl- and polyfluoroalkyl-phosphorodicnlor-idates or aryl- and alkylphosphonic dichlorides in the presence of metal of metal salt catalysts yields chloroan-hydrides (II) and (III). When benzyl phosphorochloridates (IV) are used as phosphorylating agents, either products of phosphorylation or products of alkylation are formed depending on the nature of the substituent in the aromatic ring. 相似文献
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通过二茂铁甲醛与丙二胺反应得到双二茂铁基醛亚胺配体N~1,N~3-双二茂铁亚甲基丙烷-1, 3-二胺(FcMP), FcMP与MoO_2Cl_2(THF)_2的四氢呋喃溶液作用, 合成了双二茂铁基醛亚胺钼(VI)配合物. 以配合物为催化剂, 叔丁基过氧化氢为氧化剂, 分别以苯乙烯和环己烯为底物, 考察了温度、时间、催化剂量及溶剂对于烯烃均相环氧化反应的催化性能的影响. 结果表明, 在最优实验条件下, 反应12 h, 环己烯的转化率为88%, 环氧环己烷的选择性为98%;苯乙烯的转化率为84%, 氧化苯乙烯的选择性为76%. 催化剂经简单分离可回收使用, 且催化活性基本保持不变. 同时对环氧化反应的机理进行了初步探讨. 相似文献
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由三齿配体2,6-二[1-(2-甲基苯基亚胺)乙基]吡啶(L1)和2,6-二[(1-苯基亚胺)乙基]吡啶(L2)分别与NiCl2.6H2O在乙腈中反应,合成了两个吡啶二亚胺基氯化镍配合物L1Ni(Ⅱ)Cl2.CH3CN(1)和L2Ni(Ⅱ)Cl2(2).通过元素分析、IR和1HNMR对配体和配合物进行了结构表征,并测定了配合物1和2的晶体结构.X射线衍射分析结果表明,两个配合物均为五配位扭曲三角双锥构型,属单斜晶系,Cc空间群.配合物1的晶胞参数a=2.5783(5)nm,b=1.4843(3)nm,c=1.5866(3)nm;β=122.82(3),°V=5.1024(18)nm3,Z=4,R1=0.0708,配合物2的晶胞参数a=1.5772(1)nm,b=0.8594(1)nm,c=1.5459(1)nm;β=103.27(1),°V=2.039(2)nm3,Z=4,R1=0.0375.配合物1和2经MAO活化后对乙烯聚合表现出较低的催化活性. 相似文献
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由丁二酰肼Ⅰ与取代苯甲酰基异硫氰酯在无水CaCl_2处理过的乙腈溶剂中亲核加成,制得一系列未知的双(1-乙酰基-4-取代苯甲酰基氨基硫脲)衍生物Ⅱ,Ⅱ在碱性条件下环化为未知的双(3-亚甲基-4-取代苯甲酰基-1,2,4-三唑啉-5-硫酮)Ⅲ ,所有化合物结构均经鉴定,部分化合物对枯草芽孢杆菌和大肠杆菌有抑制作用。 相似文献
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合成了一系列吡啶双亚胺酰氯三齿Ni(Ⅱ) 配合物(1a~1c, 2a~2c), 通过傅里叶变换红外光谱和元素分析对配合物进行表征, 测定了配合物1a~1c的晶体结构. 3个化合物同属于单斜晶系, 且都具有以Ni原子为中心的近似于Cs对称的扭曲三角双锥构型. 该系列配合物通过倍半乙基氯化铝(EASC)活化, 在20 ℃下对丁二烯聚合表现出良好的催化活性, 得到分子量为4700~5200、 cis-1,4含量为74.8%~77.2%(摩尔分数)的液体聚丁二烯. 通过改变配体的结构和聚合条件, 可在一定范围内调控聚丁二烯的结构和分子量. 相似文献
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M. I. Kabachnik L. S. Zakharov E. I. Goryunov P. V. Petrovskii T. M. Shcherbina 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4)
Abstract The methods of synthesis unsymmetrical polyfluoroalkyl phosphates (II) by catalytic phosphorylation of phenols or polyfluoroalkanols by chlorophosphates (I) were elaborated 相似文献
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报道了3个β-羟亚胺配体(2,6-emPr2C6H3)N=C(Ph)CH2CH(Ph)OH(1a), (2,6-emPr2C6H3)N=C·(Ph)CH2C(Ph)2OH(1b)和(2,6-emPr2C6H3)N=C(Ph)CH2C(C12H8)OH(1c)及其二(β-羟亚胺)二氯化钛配合物[(2,6-emPr2C6H3)N=C(Ph)CH2CH(Ph)O]2TiCl2(2a), [(2,6-emPr2C6H3)N=C(Ph)CH2C(Ph)2O]2·TiCl2(2b)和[(2,6-emPr2C6H3)N=C(Ph)CH2C(C12H8)O]2TiCl2(2c)的合成, 并对其结构进行了表征. 在助催化剂甲基铝氧烷(MAO)作用下, 以化合物2b为主催化剂, 研究了Al/Ti摩尔比、 反应时间、 温度和聚合压力等对乙烯聚合的影响, 发现该催化体系在较宽的反应条件下均可得到很高分子量的聚乙烯, 熔点均在140℃左右. 以化合物2a~2c为主催化剂对乙烯进行催化聚合, 发现在β碳位上取代基的立体位阻对催化剂活性有很大影响. 当化合物2b上引入2个苯基取代基时, 催化剂显示出最佳催化活性. 相似文献
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全氟烷基磺酰亚胺配合物及其催化应用 总被引:4,自引:2,他引:2
介绍了全氟烷基磺酰亚胺(PFSI)配合物的结构、性质及制备,综述了一些全氟烷基磺酰亚胺配合物作为Lewis酸催化剂的最新应用进展,并对其催化应用前景进行了展望. 相似文献
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在无溶剂微波辐射下,芳醛或亚胺在中性三氧化二铝吸附的单质碘催化下快速地与吲哚发生亲电取代反应制得双吲哚甲烷衍生物(收率70%一97%),其结构经^1H NMR,IR和元素分析表征。 相似文献
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Boroujeni K. P. Shahrokh M. Kiani K. Farokhnia A. Kazemi R. Kheiri F. 《Russian Journal of Organic Chemistry》2020,56(10):1823-1831
Russian Journal of Organic Chemistry - Some bimetallic and trimetallic magnetic nanoalloys based on cobalt, copper, and silver have been synthesized and used as and green catalysts for the... 相似文献
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C. Cismaş I. Grosu G. Plé E. Condamine Y. Ramondenc L. Toupet I. Silaghi-Dumitrescu G. Nemeş A. Terec L. Muntean 《Structural chemistry》2005,16(4):369-377
The synthesis and stereochemistry of some new bis(1,3-oxathian-2-yl) derivatives are reported. The conformational behavior of these compounds and the orientation of their substituents are deduced from the NMR spectra, from the X-ray crystal structures of two compounds and from the ab-initio level calculations. The epimerization of diastereoisomers and the chair ⇌ 22,5-twist equilibria were studied by variable temperature NMR. 相似文献
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Synthesis of Bis(2-Pyridylphosphino)Alkanes in Superbasic Medium and Their Hydroxymethyl Derivatives
Tatyana I. Fesenko Alia V. Shamsieva Elvira I. Musina Igor D. Strelnik Andrey A. Karasik Oleg G. Sinyashin 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-3):63-65
Abstract Novel P-H-diphosphinoalkanes with pyridyl substituents at the phosphorus atoms have been obtained in good or moderate yields by the interaction of primary 2-pyridyl-phosphine with dichloroalkanes in superbasic medium. The formation of novel 1-(2-pyridyl)-1-phosphacyclopentane together with bis(2-pyridylphosphino)butane was observed as the result of the interaction of 2-pyridylphosphine and 1,4-dichlorobutane under the same reaction conditions. The reaction of the bis(2-pyridylphosphino)alkanes thus obtained with formaldehyde leads to the formation of the corresponding hydroxymethyl derivatives. 相似文献
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本文报道了三唑嘧啶酮类化合物的催化合成方法。烷基胺与氰基亚胺硫代二甲酯在季氨盐催化作用下得到质量好、收率高的3-烷氨基-5-氨基-1,2,4-三氮唑,进一步经过亚胺中间体并与α,β-不饱和酸酯作用后,中间产物在Lewis酸催化作用下水解得到三唑嘧啶酮。该催化方法成本低,反应条件温和,工艺安全并对环境友好。同时报道了所有中间产物的核磁共振氢谱分析结果。 相似文献