共查询到20条相似文献,搜索用时 15 毫秒
1.
Guido Viscardi Piero Savarino Pierluigi Quagliotto Ermanno Barni Mauro Botta 《Journal of heterocyclic chemistry》1996,33(4):1195-1200
Heterocyclic azodyes of the pyridylazonaphthol and pyridylazoresorcinol series containing tuned hydrophobic chains have been prepared. Due to their chelating properties, the dyes are suitable candidates for preconcentration and selective separation of transition metal ions. After a discussion on the choice of the best synthetic pathway, physical and spectral uv/visible properties are presented and correlated with the structural features. A detailed analysis of nmr spectra allowed the clarification of currently unresolved signal assignments. 相似文献
2.
The reactions of [Pt2Me4(μ-SMe2)2] with imine ligands derived from 3-furaldehyde, 3- or 4-pyridinealdehyde and N,N-dimethylethylenediamine, and 3-furaldehyde and chlorobenzylamine are reported. The furane ligands coordinated to platinum through the nitrogen donor and could be forced to orthometallate under severe conditions. The ligands with pyridine rings gave only substitution of the ligand for the dimethylsulphide. The oxidative addition reactions of the orthometallated complexes with methyl iodide as well as the complexes' reactions with triphenylphosphine are also reported. Correlation between aromaticity of the orthometallated ring and reactivity of the complexes is observed. 相似文献
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几个硫杂环配体的合成 总被引:3,自引:0,他引:3
4,5—二硫基—1,3—二硫杂戊烯—2—硫酮[dmit]的锌配合物与有机卤化物 反应,合成了含有吸电子基的1,3—二硫杂戊烯—2—硫酮的配体,用IR,^1H NMR,MS等表征了其结构. 相似文献
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Jonathan W. Slater 《Tetrahedron letters》2006,47(39):6941-6943
The syntheses of five new mixed azine-azole binucleating ligands are described. 相似文献
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Palladium(II) malonato complexes with heterocyclic ligands have been synthesized and characterized by spectroscopic and biological studies. The compoun 相似文献
9.
L’. Lajdová E. Jóna S. Šnircová J. Miklovič P. Segl’a M. Pajtášová D. Ondrušová S. C. Mojumdar 《Journal of Thermal Analysis and Calorimetry》2009,96(1):59-62
The stoichiometry of thermal decomposition of the complexes Ni(NCS)2(fpy)4 (I), Ni(NCS)2(bfpy)4 (II) and Ni(NCS)2(CF3Phfpy)4 (III) (where fpy=furopyridine, bfpy=benzo-[2,3]furo[3,2-c]pyridine, CF3Phfpy=2-(3-fluoromethylphenyl) furo[3,2-c]pyridine) have been investigated in nitrogen atmosphere from room temperature to
500°C by means of TG and DTG. The results revealed that release of the heterocyclic ligands occurs in two steps. IR data suggested
that fpy, bfpy and CF3Phfpy ligands were coordinated to Ni(II) through the N atom of the respective heterocyclic rings and same is the case with
the anionic NCS group. 相似文献
10.
E. Jóna L’. Lajdová L’. Kvasnicová S. Lendvayová M. Pajtášová D. Ondrušová P. Lizák S. C. Mojumdar 《Journal of Thermal Analysis and Calorimetry》2011,104(3):817-821
The thermal decomposition of the complexes Mg(SCN)2(2-OHpy)4·H2O(I), Mg(SCN)2(quin)4·2H2O(II) and Mg(SCN)(quinox)4·5H2O(III) (2-OHpy–2-hydroxypyridine, quin–quinoline, quinox–quinoxaline) has been investigated in static air atmosphere at 20–1000 °C
by means of thermogravimetry (TG), differential thermal analysis (DTA), and infrared (IR) spectroscopy. The composition of
the complexes had been identified by means of elemental analysis and complexometric titration. The possible scheme of destruction
of the complexes is suggested. The final product of the thermal decomposition was MgS. IR data suggest that heterocyclic ligands
were coordinated to Mg(II) through the nitrogen atom of their heterocyclic ring. Thiocyanate group is also coordinated through
the nitrogen atom. 相似文献
11.
L’. Lajdová E. Jóna J. Miklovič P. Segl’a L’. Kvasnicová S. Šnircová R. Janík S. C. Mojumdar 《Journal of Thermal Analysis and Calorimetry》2010,100(3):857-860
The stoichiometry of thermal decomposition of the complexes Co(NCS)2(fpy)4 (I), Co(NCS)2(Mefpy)4 (II) and Co(NCS)2(bfpy)4 (III) (where fpy = furo[3,2-c]pyridine, Mefpy = methylfuro[3,2-c]pyridine, bfpy = benzo-[2, 3]furo[3,2-c]pyridine) have been investigated in nitrogen atmosphere from room temperature (RT) to 800 °C by means of TG and DTA. The results revealed that release of heterocyclic ligands occurs in one step. Infrared data suggested that fpy, Mefpy and bfpy were coordinated to Co(II) through the nitrogen atom of the respective heterocyclic ring and anionic ligands through nitrogen atom of the NCS groups. 相似文献
12.
E. Jóna L’. Lajdová M. Loduhová S. Lendvayová V. Pavlík J. Moncol’ P. Lizák S. C. Mojumdar 《Journal of Thermal Analysis and Calorimetry》2012,108(3):921-926
Thermogravimetry (TG), derivative thermogravimetry (DTG) and infrared (IR) spectroscopy have been applied to the investigation of the thermal behaviour and structure of the compounds [Cu(2-Clbz)2(nia)2(H2O)2] (I), [Cu(2-Clbz)2(nia)2]·H2O (II), [Cu(2-Brbz)2(nia)2]·2H2O (III), [Cu(2-Brbz)2(nia)2(H2O)] (IV), where 2-Clbz and 2-Brbz?=?2-chloro- and 2-bromobenzoate anions, nia?=?nicotinamide, H2O?=?water molecules. Thermal decomposition of all studied compounds proceeds in three steps. Heating the compounds first results in a release of non-coordinated and/or coordinated water molecules. The final product of thermal decomposition was CuO. The thermal stability of the complexes can be ordered in the sequence: I<IV<III<II. Nicotinamide is coordinated to Cu(II) through the nitrogen atom of the heterocyclic ring. IR data suggest the unidentate coordination of benzoate anions to Cu(II) in complexes I, IV and bidentate coordination in complexes II and III. 相似文献
13.
Viswanathan Mahalingam Nataraj Chitrapriya Frank R. Fronczek Karuppannan Natarajan 《Polyhedron》2008,27(7):1917-1924
The synthesis and characterization of ruthenium(II) complexes, [RuCl2(dmso)2(bfmh)] (1; dmso = dimethyl sulfoxide, bfmh = benzoic acid furan-2-ylmethylene-hydrazide), [RuCl2(dmso)2(btmh)](2; btmh = benzoic acid thiophen-2-ylmethylene-hydrazide), [RuCl2(dmso)2(bfeh)](3; bfeh = benzoic acid (1-furan-2-yl-ethylidene)-hydrazide) and [RuCl2(dmso)2(bpeh)](4; bpeh = benzoic acid (1-pyridin-2-yl-ethylidene)-hydrazide) are described. The ligands, when treated with either cis-[RuCl2(dmso)4] or trans(Cl)–[RuCl2(dmso)2(bpy)], resulted in the same products. This has been confirmed by IR spectra and single crystal X-ray diffraction studies. The redox behaviors of the complexes have been found to be strongly dependent on the electronic nature of the moieties present in the hydrazone ligands. The binding of the complexes to Herring sperm DNA has been studied by absorption titration and cyclic voltammetry. But, due to the random change in the absorption on the addition of DNA, only a qualitative result rather than a quantitative result has been obtained. All the complexes have been found to bind DNA through different modes to different extents. The antibacterial properties of the ligands and the complexes have been studied against five pathogenic bacteria and also the minimum inhibitory concentrations (MIC) of all the ligands and complexes 2 and 4 have been evaluated. 相似文献
14.
M. V. Varaksin I. A. Utepova O. N. Chupakhin V. A. Davankov M. M. Ilyin M. M. Ilyin Jr. V. L. Rusinov P. A. Slepukhin 《Russian Chemical Bulletin》2009,58(6):1155-1161
The σH-adducts of 3-(2-pyridyl)-6-aryl-1,2,4-triazines with lithium derivatives of oxazolinylferrocenes were obtained for the first time. 相似文献
15.
A fascinating 3D pseudo-polyrotaxane architecture with 1D polymeric [Ag(bpp)](n) chains penetrating 2D (6,3) [Ag(2)(bpp)(2)(ox)](n) sheets and a 3D coordination network constructed with 2D infinite [Ag(ppa)](n) beta-sheetlike layers pillared by ox ligands (bpp = 1,3-bis(4-pyridyl)propane; ppa = N-(4-pyridinylmethyl)-4-pyridinecarboxamide; ox = oxalate) have been prepared by utilizing flexible pyridyl-type ligands and have been crystallographically characterized. Crystal data for 1: monoclinic, space group C2/c, a = 7.619(2) A, b = 19.781(4) A, c = 26.799(5) A, beta = 94.720(10) degrees, U = 4025.2(15) A(3), and Z = 4. Crystal data for 2: monoclinic, space group C2/c, a = 28.947(8) A, b = 8.617(3) A, c = 16.307(6) A, beta =121.07(1) degrees, U = 3484(2) A(3), and Z = 4. 相似文献
16.
I. P. Gloriozov M. V. Zabalov D. A. Lemenovsky Yu. F. Oprunenko 《Russian Chemical Bulletin》2005,54(9):2055-2066
The reactions of tricarbonylchromium complexes of polyaromatic carbo-and heterocyclic derivatives with BunLi was studied by the density functional theory. The kinetic and thermodynamic factors for controlling the direction and selectivity
of metallation were calculated for the model biphenylenetricarbonylchromium complex. Both approaches indicate that lithiation
occurs exclusively at the aromatic ring bonded to the transition metal, which agrees with experimental data, while the selectivity
inside this ring is determined more exactly by the thermodynamic factor. The solvation effects were simulated for the lithium
salt of the tricarbonylnaphthalenechromium complex in which the lithium atom is localized in position 1 of the coordinated
ring. The simulation showed the stable coordination of the lithium atom with two THF molecules, and the addition of the next
THF molecule is thermodynamically unfavorable. The results of calculation of the relative energies for all possible THF-solvated
lithium salts of the tricarbonylchromium complexes of biphenyl, naphthalene, biphenylene, and dibenzothiophene indicate that
the difference in energies Δ E ≤ 1 kcal mol−1 corresponds to the experimentally observed absence of selectivity, while the difference more than 2.5 kcal mol−1 corresponds to the selectivity of the reaction. No additional coordination of the lithium atom to the free electron pair
of the heteroatom was observed for the sulfur-containing dibenzothiophene complex. Similar calculations show that double metallation
in the dibenzothiophene complex occurs at positions 1 and 4. The developed approach enables one to predict the direction and
selectivity of metallation reactions of transition metal complexes with different arenes.
Dedicated to Academician N. S. Zefirov on the occasion of his 70th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1993–2003, September, 2005. 相似文献
17.
Synthesis of new ansa-metallocene catalysts incorporating branched alkyl groups alpha to the bridgehead carbon of indenyl and thiapentalenyl ligands is reported. Me2Si(2-Me-4-Ph-Indenyl)2ZrCl2 and Me2Si(2,5-Me2-3-Ph-Thiapentalenyl)2ZrCl2 type metallocenes with one and two isopropyl groups substituted for 2-methyl substitutents were prepared and used as procatalysts
in propylene polymerizations and E/P copolymerizations. The 2-isopropyl groups influenced catalyst activity, molecular weight,
and the relative amounts of microstructure errors. In contrast to procatalysts with only 2-methyl groups, polymer molecular
weights increased in E/P copolymerizations with 2-isopropyl substituted complexes.
The text was submitted by the authors in English. 相似文献
18.
Summary Complexes of the [Rh(N-N)(CO)2][RhCl2(CO)2], [Rh(N-N)(CO)2]BF4 and Rh(N-N)(CO)2Cl types where (N-N) = 2,9-dimethyl-1,10-phenanthroline (Me2Phen), 4,7-diphenyl-1,10-phenanthroline (Ph2Phen), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (Me22Ph2Phen) or 2,2-biquinoline (biq), have been prepared and investigated. Benzidine (benz) ando-tolidine (tol) also form complexes of the first type. The complexes of the first two types behave as 11 electrolytes. While Ph2Phen forms the four coordinate monocarbonyl Rh(Ph2Phen)(CO)Cl complex, benzo(f)-quinoline (Q) yields the Rh(CO)2 (Q)Cl compound. Triphenyl-phosphine and triphenylarsine react with the above complexes to form the well knowntrans-Rh(CO)ClL2 where L = PPh3 or AsPh3. The i.r. and u.v.-visible spectra of the compounds are discussed. 相似文献
19.
Paule Castan 《Transition Metal Chemistry》1981,6(1):14-17
Summary The reaction of copper(I) or copper(II) halides with thiocaprolactam, tetrahydro-2-pyrimidinethione, 2-imidazolidinethione(ethylenethiourea), and 2-thioxoimidazolinone(thiohydantoin), yields complexes of general formula CuLCl or CuL2Cl. These complexes have been characterized by analysis, and by i.r. and n.m.r. (1H and13C) spectroscopy. The coordination site is discussed according to the various data obtained. 相似文献
20.
Several metallomesogens based on enaminoketonato ligands have been prepared. 1-Amino-1-(4'-butoxy-4-biphenyl)oct-1-en-3-one was synthesized by heterocycle hydrogenolysis in 3-(4'-butoxy-4-biphenyl)-5-amyl-isoxazole. Liquid crystalline complexes were obtained by reaction of this enaminoketone with nickel(II) or copper(II) acetates. Hydrogenolysis of the heterocycle in 3-(4-hydroxyphenyl)-5-amylisoxazole led to 1-amino-1-(4-hydroxyphenyl)oct-1-en-3-one. The corresponding copper(II) enaminoketonate was then obtained. The subsequent reaction of this compound with 4-alkoxy-benzoic acid chlorides gave liquid crystalline complexes with ester bridges in the core. A nematic phase was observed for all the synthesized metallomesogens. The bridging group influence on melting points, mesophase ranges and thermal stability of copper(II)complexes is discussed. 相似文献