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1.
N. V. Chizhova O. M. Kulikova N. Zh. Mamardashvili 《Russian Journal of General Chemistry》2013,83(11):2108-2111
The interaction of 5,10,15,20-tetraphenylporphyrin, 5,10,15,20-tetra-(4-chlorophenyl)porphyrin, 2-bromo-5,10,15,20-tetraphenylporphyrin, and 2,3,12,13-tetrabromo-5,10,15,20-tetraphenylporphyrin with platinum(II) chloride in boiling phenol has been studied. The corresponding platinum(II) porphyrinates have been synthesized; their subsequent treatment with bromine in chloroform resulted in platinum(IV) porphyrinates. The Pt(II) and Pt(IV)(Br)2 porphyrinates have been identified by elemental analysis, electron absorption, IR, and 1H NMR spectroscopy. 相似文献
2.
IntroductionTheabilityofdithiocarbamate(dtc)bindingtometalshasbeenknownformanyyears .Itformschelateswithvirtu allyalltransitionmetals.1Thebidentateanionisalsowellknownasabridgebetweentwotransitionmetalcenters.2 Wa ter solubledialkyldithiocarbamatecomplexes… 相似文献
3.
《Journal of Coordination Chemistry》2012,65(11):1811-1819
Trichloro- and triisopropoxy-niobium(V) and tantalum(V) alkylene dithiophosphates, (M = Nb(V) or Ta(V); G =–CHMeCHMe–,–CMe2CMe2–,–CH2CMe2CH2–,–CH2CEt2CH2–or–CMe2CH2CHMe–and X = Cl or OPri) have been synthesized by reaction of metal(V) chloride, MCl5, or triisopropoxymetal(V) dichloride, (PriO)3MCl2, with the sodium salts of O,O′-alkylene dithiophosphoric acids, in 1 : 2 molar ratio in THF under anhydrous conditions. These pink-purple or light-yellow compounds are viscous, semi-solid or solid, hydrolyzable and soluble in common organic solvents. These compounds have been characterized by elemental analyses, molecular weight determinations and spectral studies like IR and heteronuclear NMR (1H, 13C and 31P), which indicated a bidentate mode of chelation of dithio ligands, leading to a pentagonal bipyramidal geometry around the niobium(V) or tantalum(V) centers. 相似文献
4.
A. A. S. Elkhaldy A. R. Hussien A. M. Abu Shanab M. A. Wassef 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):589-597
Abstract Reactions of O,O′-dialkyl and alkylene dithiophosphoric acids with bis (cyclopentadienyl) titanium(IV) and zirconium (IV) dichloride in a 1:1 molar ratio in refluxing benzene proceeds with elimination of HCl and formation of the substituted derivatives, Cp2MCl[S2P(OR)2] (where R = Et, Pr-n, Pr-i, Bu-i and Ph), Cp2MCl[S2POGO] (where G = ?CH2CMe2CH2?, ?CH2CEt2CH2? and ?CMe2CMe2?), (M = Ti and Zr). The complexes are dark red and yellow solids, soluble in common organic solvents and monomeric in nature. These have been characterized on the basis of elemental analyses, molecular weight determinations, IR, and NMR (1H, 13C, and 31P). GRAPHICAL ABSTRACT 相似文献
5.
《Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy》1989,45(2):159-161
Pressure effects on the MLCT bands of the pyrazine- and 4-cyanopyridine-pentacyanoferrate(II) anions have been established. The relation of these piezochromic effects to the solvatochromism of each complex is put into the correlation between these parameters developed for other d6 ternary complexes. The conformance of piezochromic and solvatochromic efrects on MMCT bands for diiron and diruthenium mixed valence complexes to this correlation is examined. 相似文献
6.
A. N. Blinnikov S. Kulikov N. N. Makhova L. I. Khmel'nitskii 《Russian Chemical Bulletin》1996,45(7):1692-1698
A general and simple preparative method for the synthesis of -hydroxyalky(benzyl)furazan and -furoxan derivatives is proposed, The method involves reduction of acyl or ethoxycarbonyl substituents in these heterocyclic compounds with NaBH4 in ethanol. Based on the alcohols thus prepared, a number of previously unknown functional derivatives (-nitroxyalkyl--haloalkyl-, and -azidoalkylfurazans and -furoxans) have been synthesized.Translated fromInvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7. pp, 1782–1788, July, 1996. 相似文献
7.
Fullerenesareakindofcarbonallotropesfoundrecently,andhavedistinctivestructuresandproperties.Forexample,C60hasafootballlikecarbonskeletonwith20sixmemberedrings,12fivememberedringsandalargeballshelllikeπbondsystem.Alternatively,C70hasanellipsoidlikecarbonskel… 相似文献
8.
《Tetrahedron: Asymmetry》1999,10(10):1969-1977
Pseudomonas cepacia lipase (PSL) efficiently catalyses the kinetic resolution of (±)-cis- and (±)-trans-1-aminoindan-2-ol through the O-acylation reaction of the corresponding N-benzyloxycarbonyl derivative using vinyl acetate as the acyl donor. In a similar way, cis-N-Cbz-2-aminoindan-1-ol is resolved when isopropenyl acetate is used as the acylating agent. The enantioselectivity of the reaction was lower for (±)-trans-N-Cbz-2-aminoindan-1-ol due to the different steric requirements for the two conformers of this substrate. 相似文献
9.
Two new coordination polymers [Cd(EBLA)(ip)(H2O)](1) and [Ni(EBSA)(im)2(H2O)]n(2) were synthesized by hydrothermal and solution methods using 2,2'-dithiosalicylicacid(EBSA), 1H-imidazo[4,5-f][1,10]phenanthroline(ip), imidazole(im), Cd(NO3)2·4H2O and Ni(NO3)2·6H2O. The complexes were characterized by elemental analysis and FT-IR. Meanwhile, the crystal structures, fluorescence properties of complex 1 and thermogravimetrie analysis of complex 2 have been studied. In complex 1, 2,2'-dicarboxydiphenylthioether(EBLA) was prepared with 2,2'-dithiosalicylicacid(EBSA) in situ reaction by hydrothermal method. Complex 1 is a dinuclear structure and Cd2+ is five-coordinated in a distorted trigonal bipyramidal geometry. Complex 2 is a one-dimensional infinite linear chain and Ni2+ is six-coordinated to form a distorted octahedral geometry. Hydrogen bonding and π-π interactions are observed in these complexes. 相似文献
10.
E. Havránek A. Bumbálová P. Křenek M. Strašák M. Beláková M. Komová 《Journal of Radioanalytical and Nuclear Chemistry》1991,155(4):253-261
The preparation of99mTc-Sn-EBV and99mTC-Sn-EBA is described. Different parameters affecting the labeling efficiency (ligand concentration, pH, molar ligand: reducing agent ratio) as well as the time-dependent stability of labeled compounds were investigated. Preliminary biodistribution studies in Wistar rats showed accumulation of the above mentioned compounds in kidneys. 相似文献
11.
Zhaoye Li Rujiang Ma Ang Li Huan He Yingli An Linqi Shi 《Colloid and polymer science》2011,289(13):1429-1435
In this paper, multicolored micelles were prepared by coordination of lanthanide(III) (europium(III) (Eu(III)) and terbium(III)
(Tb(III))) ions with block copolymer in different molar ratios of n
Eu(III)/n
Tb(III). The micelles formed by polymer–Eu(III)/Tb(III) could emit higher quantum yield luminescence than the mixture of polymer–Eu(III)
micelles and polymer–Tb(III) micelles. The micelles containing Eu(III) and Tb(III) could emit a yellow-green color, and the
intensity varied with the molar ratios of n
Eu(III)/n
Tb(III). In the constant concentrations of Eu(III) and 1,10-phenanthroline (Phen), the intensity of 5D0→7F2 increased with the addition of Tb(III), and the intensity of 5D4→7F5 decreased with the increasing of Eu(III) in the constant concentrations of Tb(III) and Phen. All the multicolored micelles
could be spin-coated as intensity-tunable films. 相似文献
12.
Porphyrin polymers are of interest in relation to conductive materials[1, 2], catalysts for photosynthetic charge separation[3], or the fundamental features in biological systems[4]. There have been many versatile studies about them[5.6]. The one-dimensional "Shish Kebab"porphyrin polymers synthesized with a new method different from those reported and Schiff-base porphyrin polymers with two-dimensional nano-structure have provided a new field of study. The present paper covers highly ordered… 相似文献
13.
A. N. Azizova D. B. Tagiev Sh. G. Kasumov Kh. I. Gasanov 《Russian Journal of General Chemistry》2018,88(3):505-508
The platinum(II) and palladium(II) complexes [Pt6(SCH2CH2NH2)8]Cl4 and [Pd6(SCH2CH2OH)8 Cl4· 5H2O with mercamine and β-mercaptoethanol, respectively, were synthesized. It was found on the basis of the comparison of IR and X-ray electron spectra of the ligands and complexes, and also of the data of X-ray diffraction analysis that the bidentate coordination of ligands through sulfur and nitrogen atoms is realized in the platinum(II) complex. In the palladium(II) complex β-mercaptoethanol is coordinated in a mixed-mode type. In both complexes sulfur atoms of the ligands occupy a bridging position. 相似文献
14.
Raj Kumar Dubey 《Transition Metal Chemistry》1993,18(2):243-247
Summary
-Diketonato- and phenoxo-derivatives of mono(dizirconium-ennea-isopropoxy) copper(II), [Cu{Zr2(OPr-i)9}-(RCOCHCOR)] and [Cu{Zr2(OPr-i)9}(-OAr)], have been prepared by the interaction of K(RCOCHCOR) or KOAr (1 mol) [R = R = Me (1a); R = R = CF3 (1b); R = Me, R = CF3 (1c); OAr = 2,6-Me2C6H3O (2a), 3,5-Me2C6H3O (2b), p-ClC6H4O (2c)] with [Cu{Zr2-(OPr-i) 9}(-Cl)] (1 mol) in PhH. Alcohol interchanges of the derivative [Cu{Zr2(OPr-i)9}(-Cl)] have also been studied. These new compounds have been characterized by elemental analyses, i.r., electronic and e.s.r. spectra, and magnetic susceptibility measurements. The studies indicate a distorted octahedral geometry around CuII. 相似文献
15.
Preparation and polymerization mechanism of dihydroxy-capped PCL,poly(CL-b-PEG-b-CL) and poly(DTC-b-CL-b-DTC) 总被引:2,自引:1,他引:1
CHEN Wei LING Jun & SHEN Zhiquan Institute of Polymer Science Zhejiang University Hangzhou China 《中国科学B辑(英文版)》2005,48(4)
PCL possesses a wide range of medical applications, such as tissue engineering and controlled drug release, because of its good biodegradability and miscibility. In order to extend the use of PCL, researchers have been exploring its structural and chemica… 相似文献
16.
《结构化学》2017,(5)
The reactions of 4H-1,2,4-triazole(Htrz) with ZnCl_2, 1H-tetrazole(Htez) and Cu(NO_3)2·6H_2O afford two novel coordination polymers respectively, {[Zn_2(trz)_2(ox)](H_2O)_3}n(1) and {[Cu_3(tez)_3(OH)_2(H_2O)_2](NO_3)(DMF)_4}_n(2)(H_2ox =(COOH_)2, DMF = N,N-dimethylformamide). 1 shows 1D channels along the a axis filled with water molecules and 2 features a 2D bi-layered framework based on trinuclear Cu(II) units bridged by two μ3-OH groups. In addition, in vitro antitumor activities of compounds 1 and 2 on four human lung cancer cells(16HBE, NCI-H1299, NCI-H460 and NCI-H292) were further determined. 相似文献
17.
ZHANG Xing-Chuana YU Jinga WANG Zun-Yaoa② LIU Hong-Xiab a 《结构化学》2006,25(7):823-829
1 INTRODUCTION Quantitative structure-activity relationship (QSAR) equation could be employed to predict the biological activities of unknown compounds, which is signifi- cant for initial screening and evaluation of toxic compounds[1]. Soil sorption coeff… 相似文献
18.
Ping ZHENG Wei Lin SUN* Zhi Quan SHEN Department of Polymer Science Engineering Zhejiang University Hangzhou 《中国化学快报》2005,(10)
In recent years,the organic ferromagnets have drawn growing attention due to their characteristics of structural diversities,low density,and readily processing1-3.Design and synthesis of magnetic polymers are one of great challenges in today′s magnetic material research,and some significant achievements have been made in this field4,5.In this article,we describe the synthesis of acrylamide-type polymer with pendent thiazolyl groups(Scheme1).The as-prepared polymer exhibited better solubility … 相似文献
19.
《结构化学》2016,(6)
Two high coordination crystals were obtained by the interaction of Ce~(3+) and Nd~(3+) with polypyridyl quinoxaline ligand 2,3,6,7,10,11-hexakis(2-pyridyl)dipyrazino[2,3-f:20,30-h]quinoxaline(HPDQ), and they were characterized. Complex 1 exhibits a 0 dimensional three-nuclear structure, with the three Ce(Ⅲ) atoms being ten-, eleven- and twelve-coordinated. Complex 2 is a 0 dimensional dual-core structure and the Nd(Ⅲ) atom is ten-coordinated. Complex 1 is of monoclinic system, space group P2/c with a = 16.850(3), b = 16.617(3), c = 24.017(5) ?, β = 100.94(3)o, V = 6602(2) ?~3, Z = 4, S = 1.062, F(000) = 3372, R = 0.0504 and wR = 0.1463(I 2σ(I)). Complex 2 adopts a monoclinic system, space group C2/c with a = 25.795(5), b = 20.166(4), c = 13.059(3) ?, β = 112.29(3)°, V = 6286(2) ?~3, Z = 4, S = 1.004, F(000) = 2664, R = 0.0663 and wR = 0.1821(I 2σ(I)). Furthermore, the behaviors of HPDQ with Ce~(3+) and Nd~(3+) in the solution are also investigated. After the Ce~(3+) is added, the ultraviolet absorption of the solution is enhanced with a red shift compared with that of the HPDQ ligand. While after adding Nd~(3+), the ultraviolet absorption of the solution is weakened, and it has a red shift which is the same as Ce~(3+). However, after the respective addition of metal ions, the emission of all solutions is quenched and has a red shift compared with that of the HPDQ ligand. 相似文献
20.
Samir S. Kandil 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):2455-2463
Palladium(II) and platinum(II) complexes of N-ethyl-N′-pyrimidin-2-ylthiourea(HL1) and N-phenyl-N′-pyrimidin-2-ylthiourea (HL2) have been prepared, and the complexes [M(HL)Cl2], [Pt(L)2], [Pd(HL1)2]Cl2, and [Pd(L2)2] (where M = PdII or PtII) were characterized. The spectroscopic data are consistent with coordination of thioureas as neutral or monoanionic ligands to PdII and PtII through S and a pyrimidine-N. The IR spectra show shifts of CS and pyrimidine ring stretch bands to lower and higher frequencies, respectively. The 1H NMR spectra differentiate between H(4′) and H(6′) resonances and indicate downfield shifts for all protons of pyrimidine [H(4′), H(5′), and H(6′)], two resonances for two N?H protons for complexes containing the neutral ligand (HL), and only one N?H proton chemical shift for complexes containing the monoanion (L). 13C NMR chemical shifts of pyrimidine carbons are correlated with the type of bonding between PdII or PtII and pyrimidine-N. The magnetic susceptibilities suggest a diamagnetic planar structure for all complexes. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. 相似文献