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1.
Subhi A. Al-Jibori Afra S. S. Al-Zaubai Modher Y. Mohammed Talal A. K. Al-Allaf 《Transition Metal Chemistry》2007,32(3):281-286
Palladium(II) and platinum(II) complexes containing the mixed ligands tertiary diphosphines Ph2P(CH2)
n
PPh2, (n = 1–4) and benz-1,3-imidazoline-2-thione, benz-1,3-oxazoline-2-thione or benz-1,3-thiazoline-2-thione have been prepared
and characterized by elemental analysis, magnetic susceptibility, molar conductance and i.r. spectral data. 31P–{1H}-n.m.r. data have been applied to characterize the produced linkage isomers. 相似文献
2.
Subhi A. Al-Jibori Ziyad M. Kalay Talal A. K. Al-Allaf 《Transition Metal Chemistry》1994,19(3):293-295
Summary The mixed phosphine-phosphine oxides Ph2P(CH2)n-P(O)Ph2 (n = 1 or 2) react with K2PtCl4 to give cis-{PtCl2-
1-Ph2P(CH2)
n
P(O)Ph2]2}. Treatment of the latter (n = 2) with transition metal chlorides MCl2·nH2O, or with Me2SnCl2, SnCl4·5H2O, Th(NO3)4·xH2O or UO2(NO3)2· 6H2O, gives novel heterobimetallic complexes identified as cis-{PtCl2[-Ph2P(CH2)2P(O)Ph2]2MX2}·nH2O. Attempts to prepare similar heterobimetallic complexes using the starting complexes {PtX2[
1-Ph2PCH2P(O)-Ph2]2} (X = C1), cis- or CN, trans-] were unsuccessful. Possible reasons for this are discussed. 相似文献
3.
Subhi A. Al-Jibori Rawaa A. Q. Al-Nassiry Ghassan H. H. Al-Jibori Kurt Merzweiler Christoph Wagner Harry Schmidt Sucharita Basak-Modi Graeme Hogarth 《Transition Metal Chemistry》2014,39(7):735-740
Reaction of Na2[PdCl4] with two equivalents of amino- or acetylamino-pyridines (LH) affords trans-[PdCl2-(LH)2] {LH = 2-amino-3-methylpyridine (2-ampyH), 3-aminopyridine (3-apyH), 2-acetylamino-3-methylpyridine (2-acmpyH), 3-acetylamino-pyridine (3-acpyH)}. An X-ray crystal structure of trans-[PdCl2(2-ampyH)2] shows that the 2-ampy-H ligands are coordinated in a monodentate fashion via the nitrogen atoms of the pyridine rings. Treatment of trans-[PdCl2(2-acmpyH)2] with NEt3 affords the cyclometalated complex, trans-[Pd(κ2-2-acmpy)2], the X-ray structure of which shows that the 2-acmpy ligand is coordinated to palladium in a bidentate fashion via the nitrogen atom of the pyridine ring and oxygen. Reaction of trans-[PdCl2(LH)2] with two equivalents of sodium saccharinate affords the bis(saccharinate) complexes, trans-[Pd(sac)2(LH)2], in which the saccharinate anions are coordinated via the amide nitrogen atom. 相似文献
4.
Subhi Atiea Al-Jibori 《Transition Metal Chemistry》1995,20(2):120-122
Summary Ph2PCH(Ph)PPh2, prepared by treating Ph2PCH2Ph successively with n-BuLi and Ph2PCl, reacts with group VI metal hexacarbonyls to give [M(CO)4{Ph2PCH(Ph)-PPh2}], where M = Cr, Mo or W. The Cr complex [Cr(CO)4{Ph2PCH(Ph)PPh2}] was deprotonated with MeLi and the resulting carbanion [Cr(CO)4(Ph2-PCPhPPh2)]– acylated with RCOCl (R = Ph or p-tolyl) to give the intensely green title compounds in which an aromatic ring has become a quinonoid.Author to whom all correspondence should be directed. 相似文献
5.
根据电镜断面考察结果,以Gurson模型为本构方程的有限单元
法对包体模型及三维非均匀模型进行了详细分析. 为了评价应力-应变
关系及损伤的主要因素,考虑了基体中SiC粒子的体积率和径比的非均
匀分布. 其结果表明,用这种非均匀模型能很好地仿真铝基体在大量塑
性变形之后所发生的韧窝破坏过程. SiC粒子体积率、径比及其位置的
非均匀性,对局部和整体损伤过程与应力-应变关系的影响相当大. 当
Sic粒子径比为1.0,并在基体中均匀分布时,断裂应变会大幅度增大. 相似文献
6.
A series of organotin(IV) complexes of the general formula RxSnCl4?x.L (where R=Me, n?Bu, Ph; x = 2 or 3; L = pyrazole or pyrazol-5-one) have been prepared and characterized by elemental analyses, IR and NMR spectroscopy. The ligands used were found to coordinate with R3SnCl species as monodentate ligands via the more reactive nitrogen atom, to give pentacoordinate tin complexes, whilst they may coordinate with R2SnCl2 species as bidentate ligands through the N–N linkage to give hexacoordinate tin complexes. These were demonstrated mainly by spectroscopic data. The tautomeric behaviour of organotin complexes of pyrazol-5-one ligands in inert (CDCl3) and donor (DMSO-d6) solvents were also studied. The complexes were screened against six species of bacteria. 相似文献
7.
A method using high-performance liquid chromatography with diode array detection (HPLC-DAD) as a powerful separation technique has been developed for the simultaneous determination of the four flavonols rutin, quercetin, kaempferol and isorhamnetin in food supplements and pharmaceutical formulations. The chromatographic separation was achieved in 36?min using a Symmetry C18 column (250?×?3?mm; 5?µm) as the stationary phase and a mixture of methanol, acetonitrile, and pH 2.5 aqueous acetic acid as the mobile phase in gradient elution mode. The analytical wavelengths were 256?nm for rutin, quercetin and isorhamnetin, and 368?nm for kaempferol. An ultrasound-assisted extraction protocol was performed using methanol as solvent. The detection and quantification limits were lower than 0.03?µg mL?1 and 0.08?µg mL?1, respectively. The inter-day and intra-day precisions were less than 4.8 and 5.1%, respectively, and the average recoveries were in the range from 96 to 107%. The method was applied for the determination of the studied flavonols in food supplements and pharmaceutical preparations. The satisfactory recovery values demonstrate the potential of the developed method for the determination of the analytes in these samples. In addition, the method is suitable for routine quality control due its ease of operation. 相似文献
8.
Four wave mixing analysis is stated for quantum dot semiconductor optical amplifiers (QD SOAs) using the propagation equations (including nonlinear propagation contribution) coupled with the QD rate equations under the saturation assumption. Long wavelength III-nitride InN and AIInN QD SOAs are simulated. Asymmetric behavior due to linewidth enhancement factor is assigned. P-doping increases efficiency. Lossless efficiency for InAlN QDs for longer radii is obtained. Carrier heating is shown to have a considerable effect and a detuning dependence is expected at most cases. InN QD SOAs shown to have higher efficiency. 相似文献
9.
Subhi A. Al-Jibori Ali I. Abdullah Talal A. K. Al-Allaf 《Transition Metal Chemistry》2007,32(3):398-406
Palladium(II) and platinum(II) complexes containing mixed ligands N-(2-pyridyl)acetamide (AH) or N-(2-pyrimidyl)acetamide (BH) and the diphosphines Ph2P(CH2)
n
PPh2, (n = 1, 2 or 3) have been prepared. The prepared complexes [Pd(A)2(diphos)] or [Pd(B)2(diphos)] have been used effectively to prepare bimetallic complexes of the type [(diphos)Pd(μ-L)2M′Cl2] where M′ = Co, Cu, Mn, Ni, Pd, Pt or SnCl2; L = A or B. The prepared complexes were characterized by elemental analysis magnetic susceptibility, i.r. and UV–Vis spectral
data. 31P–{1H}-n.m.r. data have been applied to characterize the produced linkage isomers. 相似文献
10.
Al-Jibori Subhi A. Al-Nassiri Ilham N. Al-Hayaly Lamaan J. Jassim Ayad H. 《Transition Metal Chemistry》2002,27(2):191-195
Transition metal complexes containing two types of ligands: 5-phenyl-1,3,4-oxadiazole-2-thione ion (L) and tertiary phosphines, have been prepared. The complexes, [ML2A2] [M = Pd or Pt; A = PPh3 or Ph2PCH2CH2P(O)Ph2] and [ML2B] (M = Co, Ni, Pd or Pt; B = Ph2PCH2PPh2 or Ph2PCH2CH2PPh2), were characterized by elemental analysis, molar conductance, i.r., u.v.–vis., 31P-n.m.r., magnetic susceptibility measurements and mass spectra. 相似文献