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1.
本文合成了N,N’-双(2’-羟基苯乙酮)缩乙二胺、N,N’-双(2’-羟基苯乙酮)缩1,2-丙二胺、N,N’-双(2’-羟基苯乙酮)缩1,3-丙二胺和N,N’-双(2’-羟基苯乙酮)缩邻苯二胺四种Schiff配体以及它们的锰(Ⅲ)配合物1,2,3和4。并考察了这四种锰(Ⅲ)配合物作为催化剂,催化以NaOCl为氧源环氧化苯乙烯和环己烯的反应的性能。同时考察了反应温度、助配体、NaOCl的浓度以及pH值对催化环氧化反应的影响。 相似文献
2.
本文合成了4种新型不对称酰胺荚醚萃取剂:N,N′-二甲基-N,N′-二苯基-3-氧戊二酰胺(DMDPhDGA)、N,N′-二甲基-N,N′-二己基-3-氧戊二酰胺(DMDHDGA)、N,N′-二甲基-N,N′-二辛基-3-氧戊二酰胺(DMDODGA)、N,N′-二甲基-N,N′-二癸基-3-氧戊二酰胺(DMDDDGA)。以氯仿为稀释剂,研究了N,N,N′,N′-四丁基-3-氧戊二酰胺(TBDGA)及上述4种萃取剂从硝酸体系中萃取Gd(Ⅲ)的反应机理,得出萃取能力顺序为:DMDHDGA>DMDDDGA>DMDODGA>DMDPhDGA>TBDGA。考察了水相酸度和萃取剂浓度对萃取分配比的影响,得出萃合物中有3个萃取剂分子同时参与配位;并结合红外光谱解释了萃取剂结构与萃取性能的关系。 相似文献
3.
锰(Ⅱ)呋喃甲醛Schiff碱催化苯乙烯环氧化的研究 总被引:1,自引:0,他引:1
自1979年Groves首先以金属卟啉模拟细胞色素P-450,实现烯烃的环氧化^[1]以来,仿单加氧酶催化环氧化烯烃就成为仿酶催化领域里的一个非常活跃的研究课题^[2-5],但在这些报道中所用的模型化合物均为金属卟啉及其衍生物或Mn-Salen及其衍生物,这些化合物高昂的价格极大地限制了其应用前景。呋喃甲醛(俗称糠醛)取之于米糠或玉米芯,价格便宜且非石化产品,用它取代水杨醛不仅可降低成本,而且符合绿色化学要求。为此,本文选取了五种锰呋喃甲醛Schiff碱配合物作为模型化合物,以NaOCI为氧化剂,催化苯乙烯环氧化。讨论了配体结构、氧化物的pH值、轴配体、反应时间对催化环氧化反应的影响。 相似文献
4.
I. B. Rosentsveig I. V. Ushakova A. N. Mirskova G. G. Levkovskaya 《Russian Journal of Organic Chemistry》2008,44(2):218-224
Reactions of N,N,N′,N′-tetrachlorobiphenyl-4,4′-disulfonamide, 4,4′-methylenebis(N,N-dichlorobenzenesulfonamide), and 4,4′-oxybis(N,N-dichlorobenzenesulfonamide) with 1,2-dichloroethylene and trichloroethylene open convenient synthetic approach to highly electrophilic bissulfony limines of dichloroacetic aldehyde and chloral: N,N′-bis(polychloroethylidene)biphenyl-4,4′-disulfonamides, 4,4′-methylenebis[N-(polychloroethylidene)benzenesulfonamides] and 4,4′-oxybis[N-(polychloroethylidene)benzenesulfonamides]. The synthetic opportunities of the bisazomethines obtained were demonstrated by examples of their reactions with water, methanol, chloroacetamide, and toluene where products of O-, N-nucleophiles addition to the azomethine bond and products of C-amidoalkylation of aromatic compound with imines were formed. 相似文献
5.
Kil-Yeong Choi Sam-Kwon Choi 《Journal of polymer science. Part A, Polymer chemistry》1982,20(4):1107-1117
Polycondensations of N,N′-bis(hydroxyalkyl)pyromellitic diimides, N,N′-bis(hydroxyphenyl)-pyromellitic diimides, N,N′-bis(hydroxyalkyl)-3,3′,4,4′-benzophenonetetracarboxylic diimides and N,N′-bis(hydroxyphenyl)-3,3′-4,4′-benzophenonetetracarboxylic diimides with aromatic disulfonyl chlorides were carried out in pyridine to produce poly(imide-sulfonate)s. The resulting polymers had inherent viscosities in the range of 0.25–0.38 dL/g. These poly(imide-sulfonate)s were insoluble in common organic solvents and had relatively good thermal stability. The TGA data showed 10% weight losses at 253–365°C and residual weights at 500°C were 22–72% in nitrogen. 相似文献
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If a strong base is added to solutions containing complexes of trivalent antimony with aminopolycarboxylates, these ligands are displaced, and oversaturated solutions of antimony (III) hydroxide are formed. This reaction has been used to investigate the formation of complexes of SbIII with the following ligands: N′-hydroxyethyl-ethylenediamine-N,N,N′-triacetate ion, ethylenediamine-N,N,N′,N′-tetraacetate ion, 1,2-diaminocyclohexane-N,N,N′,N′-tetraacetate ion, and diethylenetriamine-N,N,N′,N″,N″-pentaacetate ion. 相似文献
8.
The equilibria occurring in aqueous solutions of N,N′-bis(β-carbamoylethyl)ethylenediamine, N,N′-bis(β-carbamoylethyl)trimethylenediamine, N,N′-bis(β-carbamoylethyl)-1,2-propylenediamine, and N,N′-bis(β-carbamoylethyl)-2-hydroxytrimethylenediamine with protons and copper(II) ions as well as the deprotonation reactions of the copper (II) complexes of these four ligands have been studied by calorimetry at T=25.0°C and I=0.10 mol dm?3 (NaClO4). The enthalpy changes and the entropy changes for these reactions are reported and discussed. 相似文献
9.
Eike Gellermann Uwe Klingebiel Thomas Pape Fabio Dall Antonia Thomas R. Schneider Stefan Schmatz 《无机化学与普通化学杂志》2001,627(12):2581-2588
Silylhydrazines and Dimeric N,N′‐Dilithium‐N,N′‐bis(silyl)hydrazides – Syntheses, Reactions, Isomerisations Di‐tert.‐butylchlorosilane reacts with dilithiated hydrazine in a molar ratio to give the N,N′‐bis(silyl)hydrazine, [(Me3C)2SiHNH]2, ( 5 ). Isomeric tris(silyl)hydrazines, N‐difluorophenylsilyl‐N′,N′‐bis(dimethylphenylsilyl)hydrazine ( 7 ) and N‐difluorophenylsilyl‐N,N′‐bis(dimethylphenylsilyl)hydrazine ( 8 ) are formed in the reaction of N‐lithium‐N′‐N′‐bis(dimethylphenylsilyl)hydrazide and F3SiPh. Isomeric bis(silyl)hydrazines, (Me3C)2SiFNHNHSiMe2Ph ( 9 ) and (Me3C)2‐ SiF(PhMe2Si)N–NH2 ( 10 ) are the result of the reaction of di‐tert.‐butylfluorosilylhydrazine and ClSiMe2Ph in the presence of Et3N. Quantum chemical calculations for model compounds demonstrate the dyotropic course of the rearrangement. The monolithium derivative of 5 forms a N‐lithium‐N′,N′‐bis(silyl)hydrazide ( 11 ). The dilithium salts of 5 ( 13 ) and of the bis(tert.‐butyldiphenylsilyl)hydrazine ( 12 ) crystallize as dimers with formation of a central Li4N4 unit. The formation of 12 from 11 occurs via a N′ → N‐silyl group migration. Results of crystal structure analyses are reported. 相似文献
10.
Ghorbani-Vaghei Ramin Malaekehpoor Seyedeh Mina Hasanein Parisa Karamyan Roya Asadbegy Mostafa 《Research on Chemical Intermediates》2016,42(5):4715-4731
Research on Chemical Intermediates - N,N,N′,N′-Tetrachlorobenzene-1,3-disulfonamide and poly(N,N′-dichloro-N-ethyl-benzene-1,3-disulfonamide) are new catalysts promoted by... 相似文献
11.
A simple, rapid, and efficient procedure for formylation of primary and secondary amines and alcohols using ethyl formate catalyzed with poly(N,N′-dichloro-N-ethyl-benzene-1,3-disulfonamide (PCBS), N,N,N′,N′-tetrachlorobenzene-1,3-disulfonamide (TCBDA), poly(N,N′-dibromo-N-ethyl-benzene-1,3-disulfonamide (PBBS) and also N,N,N′,N′-tetrabromobenzene-1,3-disulfonamide (TBBDA) was adopted. The reactions were performed under microwave irradiation with high yields. 相似文献
12.
A fluorinated tetraphenylbenzidine derivative, N,N′-diphenyl-N,N′-bis(2-fluorophenyl)-1,1′-biphenyl-4,4′-diamine (C36H26F2N2, Mr = 524.59) was synthesized via the palladiumcatalyzed Buchwald-Hartwig reaction of N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine with 2-fluoroiodobenzene (yield: 75%) and structurally characterized. It crystallizes in monoclinic, space group P21/n with a = 9.820(7), b = 14.305(11), c = 10.233(8) , β = 108.973(9)o, V = 1359.3(18) 3, Z = 2, Dc = 1.282 g/cm3, μ(MoKα) = 0.084 mm-1, F(000) = 548, S = 1.018, the final R = 0.0439 and wR = 0.0928. It presents a linear centrosymmetric framework constituted by a linkage of biphenyl as a bridge and two fluorinated diphenylamine moieties. The UV-Vis absorption and fluorescence spectra of the title compound were also investigated. This compound emits intense blue fluorescence with a peak wavelength of 406 nm in film. 相似文献
13.
Preparation and Structure of N,N′-Dithioformylaniline N,N′-dithioformylaniline was prepared by treating N,N′-dichlormethylaniline [1] with silicon disulfide [2]. The compound is characterized by the results of a X-ray structural analysis (RW = 0.030) as well as its nmr and vibration spectra. N,N′-dithioformylaniline crystallizes in the orthorhombic space group P21212 with a = 537.0(2); b = 745.7(3); c = 1111.5(4) pm; V = 445.1(3) · 106 pm3. The molecule consists of two planar parts; the angle between the plane of the aromatic ring and the plane of the N,N′-dithioformylamino group was determined to 87.7°. 相似文献
14.
The basicity constants of N,N′-bis(β-carbamoylethyl)ethylenediamine, N,N′-bis(β-carbamoylethyl)trimethylenediamine, N,N′-bis(β-carbamoylethyl)-1,2-propylenediamine, and N,N′-bis-(β-carbamoylethyl)-2-hydroxyltrimethylenediamine were determined potentiometrically in 0.10 mol dm?3 NaNO3 at 25.0°C. The formation of Cu(II) complexes of these ligands and the CuO to CuN bond rearrangements at the two amide sites of these complexes were investigated quantitatively by potentiometric and spectrophotometric techniques under the same conditions. Electronic spectra of the Cu(II) complexes of these ligands and their deprotonated species formed in aqueous solution were measured and discussed. 相似文献
15.
Logvinenko V. A. Fadeeva V. P. Selivanov B. A. Tikhova V. D. Nefedov A. A. Tikhonov A. Ya. 《Journal of Thermal Analysis and Calorimetry》2020,140(2):685-693
Journal of Thermal Analysis and Calorimetry - N,N′-Bis(2-hydroxyiminoalkyl)-α,α′-dinitrones are of interest for the synthesis of 1,1′-dihydroxy-2,2′-biimidazoles.... 相似文献
16.
The reduction of three nickel(III) complexes involving two symmetrical N,N′-ethylenebis (acetylacetoneiminato) and N,N′-ethylenebis (salicylideneiminato) and one non-symmetrical N,N′-ethylene (acetylacetoneiminatosalicylideneiminato) and Schiff bases has been investigated by electrochemistry and ESR spectroscopy. In all cases, exhaustive reduction results in the formation of nickel(I) complexes. However, ESR data support the formation of a nickel(II)-stabilized ligand radical species at the early stage of the reduction of the non-symmetrical Schiff base complex. 相似文献
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Komissarova E. A. Zhulanov V. E. Mokrushin I. G. Vasyanin A. N. Shklyaeva E. V. Abashev G. G. 《Russian Chemical Bulletin》2020,69(10):1944-1948
Russian Chemical Bulletin - New N, N′-bis(4,6-dimethylpyrimidin-2-yl)- and N, N′-bis(2,3,5,6-tetrafluorophenyl)-substituted pyromellitic diimides were synthesized. Their properties were... 相似文献
19.
A series of novel N‐tert‐butyl‐N′‐thio[O‐(1‐methylthioethylimino)‐N″‐methylcarbamate]‐N,N′‐diacylhydrazines were synthesized by the reaction of chlorosulfenyl[O‐(1‐methylthioethylimino)‐N‐methylcarbamate] with N‐tert‐butyl‐N,N′‐diacylhydrazine in the presence of sodium hydride. The reaction of sulfur dichloride with O‐(1‐methylthioethylimino)‐N‐methylcarbamate (Methomyl) in the presence of pyridine to yield chlorosulfenyl[O‐(1‐methylthioethylimino)‐N‐methylcarbamate] was reported for the first time. X‐ray single crystal diffraction of N‐tert‐butyl‐N′‐thio[O‐(1‐methylthioethylimino)‐N″‐methylcarbamate]‐N,N′‐dibenzoylhydrazine demonstrated that the parent compounds N‐tert‐butyl‐N,N′‐dibenzoylhydrazine and O‐(1‐methylthioethylimino)‐N‐methylcarbamate were combined by N S N band to give the product. Their larvicidal activities against Oriental armyworm and Aphis laburni were evaluated. All of them exhibited excellent larvicidal activities against Oriental armyworm, with some of them showing higher larvicidal activities than the parent diacylhydrazines. Toxicity assays indicated that the products show knockdown activity for O‐(1‐methylthioethylimino)‐N‐methylcarbamate at higher concentration and insect growth regulators' activities of diacylhydrazines at lower concentrations. At the same time, the products possess insecticidal activities against the aphids. © 2007 Wiley Periodicals, Inc. Heteroatom Chem 18:631–636, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/hc.20360 相似文献
20.
Transition Metal Chemistry - Mercury(II) complexes of N,N′-diarylformamidine dithiocarbamate of the general formula [Hg-(L)2] (L?=?N,N′-bis(2,6-dimethylphenyl)formamidine... 相似文献