共查询到19条相似文献,搜索用时 109 毫秒
1.
2.
3.
1 INTRODUCTION The coordination chemistry of the nitrogen-contai- ning diphosphine ligand bis(diphenylphosphino)ami- ne (Ph2PNHPPh2) has recently received much atten- tion because the P atoms can bridge metal centers in μ-bonding mode to form bi- or polynuclear complex- es[1~10]. It has been shown that the acidity of N–H proton would promote functionalization on the ligand backbone[4, 5, 11]. Although a few complexes contain- ing deprotonated tridentate Ph2PNPPh2 have been synthesi… 相似文献
4.
5.
JingLinCHEN GangQiangYIN ZhongNingCHEN 《中国化学快报》2003,14(5):519-522
The synthesis and crystal structure of oxo-centered carboxylate-bridge trinuclear ruthenium complex,Ru3O(CH3OO)6(py)2Cl(py=pyridine)(1),are reported herein.The complex 1 has been characterized by IR,cyclic voltammetry (CV),UV-Vis and X-ray crystal analysis.The complex 1 in 0.1 mol/L (n-C4H9)4HPF6-CH2Cl2 solution at room temperature shows four oneelectron redox processes at E1/2=-1.38,1.20,-0.17 and 1.07V vs. Ag/AgCl. 相似文献
6.
7.
1 INTRODUCTION The design and synthesis of polynuclear com- plexes have attracted chemists?attention in the contemporary chemistry, since their clusters maybe lead to novel materials with magnetic, optical, electronic and catalytic properties of the constituent metals[1~3]. It is also prevalently interesting to synthesize high-nuclearity metal complexes for their nanoscopic dimensions[3, 4]. Spectroscopic properties of the lanthanides are widely used in the study of biological systems. … 相似文献
8.
1INTRODUCTION Manganese complexes have drawn considerable interests in recent years because they can serve as models for active sites of manganese-containing me-talloenzymes,such as photosystem II(PSII),man-ganese superoxide dismutase(MnSOD),manganese ribonucleotide reductase(MnRR)et al[1].The binu-clear manganese enzymes,including catalase,MnRR and arginase,were indicated to have carboxylato-,oxo-,hydroxo-or aquo-bridged cores[2~4].Structures with Mn substituted into the iron ribon… 相似文献
9.
YANG Jia-Xianga ZHANG Zeb WU Jie-Yinga TIAN Yu-Penga c② DU Pengb LIU Qing-Liangb FUN Hoong Kund C. Suchadad a 《结构化学》2003,22(5):558-562
1 INTRODUCTION During the search of molecule-based materials with interesting properties such as catalysis, cla- thration etc., much attention has been focused on the synthesis of one-, two- and three-dimensional extended solids involving cadmium[1], as its d10 configuration permits a wide variety of geometries and coordination numbers. Rigid bridged ligands such as carboxylate groups are frequently used to construct these materials. Therefore, the coordi- nation chemistry of Cd(Ⅱ) ca… 相似文献
10.
ZHANG Hong WANG Xiu li LI Yang guang DUANG Li ying LAN Yang WANG Li WANG En bo ** HU Chang wen Institute of Polyoxometalate Chemistry Department of Chemistry Northeast Normal University Changchun P. R. China HUANG Wei tong Tonghua Higher Vocational Education Institute Tonghua P. R. China 《高等学校化学研究》2003,19(2):132-134
IntroductionRecently,the molecular designs of polyox-ometalates( POM) with basic oxometal clusterbuilding blocks are of great interest[1,2 ] . Hy-drothermal synthesis,with the characteristic ofone- pot reaction,provides a convenient method toobtain novel structures of POM compounds[3— 6] . Inthe Ln/Mo/O system ( Ln=rare earth) ,somecompounds containing La and Mo elements havebeen reported[7— 17] . However,these compoundshave all been synthesized under the highly restrict-ed synthetic co… 相似文献
11.
HAN Lei ZHANG Li-Yi CHEN Zhong-Ning HONG Mao-Chun 《结构化学》2002,21(6):605-608
<正>Self-organization of copper (I) ion with bridging ligand bis(diphenylphosphino)-acetylene resulted in the isolation of a dinuclear copper ( I ) complex [Cu2(μ-Ph2PC≡ CPPh2)3(MeCN)2](ClO4)2·Et2O. Structural analysis indicated the existence of a helical coordination cage, in which two copper (I) atoms are bridged triply by the linear diphosphine Ph2PC≡CPPh2 with the CuACu separation of 6.231 A. The copper (I) atom is in an approximately tetrahedral environment with a NP3 coordination chromophore. The complex crystallizes in the triclinic, space group P 1 with a = 13.8456(2), b = 16.6010(1), c = 18.9215(3) A, α = 98.289(1), β = 91.232(1), γ = 106.496(1)°, V = 4117.60(9) A3, Z = 2, C86H82Cl2N2O9P6Cu2, Mr= 1659.37, Dc= 1.338 g/cm3, F(000) = 1708, μ = 0.754 mm-1, the final R = 0.0688 and wR = 0.1940 for 11692 reflections with I>2σ(I). 相似文献
12.
Self-assembly between the building blocks of Pd(Et2dtc)2 (Et2dtc = diethyldithio carbamate) and [Cu2(μ-dppm)2(MeCN)2]2+ (dppm = bis(diphenylphosphino)methane) gave a new heterotetranuclear complex [Cu2Pd2(μ-dppm)2(μ-Et2dtc)2(μ3-Et2dtc)2](ClO4)2.H2O (C70H86Cl2Cu2-N4O9P4Pd2S8, Mr = 1932.56), and its crystal structure has been determined by X-ray crystallography. It crystallizes in triclinic, space group P1- with a = 11.9834(6), b = 12.5624(6), c =14.5603(8) A, α = 101.393 (1), β = 103.300 (1), γ= 96.310(1)°, V = 2063.2(2) A3, Z = 1, Dc =1.544 g/cm3,μ(MoKα) = 1336 cm-1 and F(000) = 978. The total and unique reflections are 8710 and 5400, respectively. The structure was refined to R = 0.0860 and wR = 0.1996 for 3914 observed reflections with I > 2σ(Ⅰ). The title complex consists of the cation [Cu2Pd2(μ-dppm)2(μ-Et2dtc)2(μ3-Et2dtc)2]2+, anion ClO4- and solvate H2O. The Pd(Ⅱ) atoms are located at the approximately square-planar environments with PS3 donors and the Cu(Ⅰ) atoms display distorted tetrahedral geometries. 相似文献
13.
SITU Yue HUANG Shao-Bin 《结构化学》2003,(4)
1 INTRODUCTION The design of heterometallic complexes of photoluminescnece is of current interest for the inorganic chemists[1, 2]. The coordination flexibility of -dppm ligand as well as the easy substitution of weakly coordinated solvate donors by stronger donors makes the binuclear compound [M2(m- dppm)2(sol)2]2+ excellent building block for con- structing various molecular materials with desired properties[3~5]. We are devoted to developing heterometallic photoluminescent transitio… 相似文献
14.
15.
采用配体取代法合成了以双二苯基膦戊烷(dpppe)及C60为配体、Pt为中心金属的C60Pt(dpppe)新型富勒烯膦金属配合物。 运用质谱、元素分析、紫外-可见吸收光谱、红外吸收光谱和光电子能谱等测试技术对产物进行了表征,同时采用循环伏安法对目标产物进行氧化还原性能研究。 结果表明,C60与金属Pt配位后还原电位发生负移。 结合电子光谱数据确定了目标产物的能级结构,其最高占有轨道和最低非占轨道能级分别为5.635和3.815 eV。 还考察了目标产物在光化学电池中的光伏效应,测试结果表明,在 BQ/H2Q介质溶液中镀层厚度为 1~2 μm 时,具有较好的光电转换性能,光生电压值最高达358 mV。 相似文献
16.
Reaction of an alkyne‐bridged dicobalt complex, [Co2(CO)6(μ‐Me3SiC=Cpy)] 4 , with bis(diphenylphosphino)methylene (DPPM) or bis(diphenylphosphino)ethylene (DPPE) in THF at 55 °C yielded a DPPM or DPPE doubly bridged dicobalt compound, [{μ‐P,P‐PPh2CH2PPh2}Co2(CO)4(μ‐Me3SiC=Cpy)] 5 or [{μ‐P,P‐PPh2CH2CH2PPh2}Co2(CO)4(μ‐Me3SiC≡Cpy)] 6 . Compound 5 and 6 were characterized by spectroscopic means as well as X‐ray crystal structure determination. 相似文献
17.
Dipak K. Dutta J. Derek Woollins Dilip Konwar Pravat Bhattacharyya 《Journal of organometallic chemistry》2006,691(6):1229-1234
The chelate complexes of the types (1) and (2) have been synthesized and characterized by IR and NMR spectroscopy. The lower shift of the ν(P-Se) bands and downfield shift of the 31P-{1H}NMR signals for both P(III) and P(V) atoms in 1 and 2 compared to the corresponding free ligands indicate chelate formation through selenium donor. 1 and 2 show terminal ν(CO) bands at 1977 and 1981 cm−1, respectively, suggesting high electron density at the metal center. The molecular structure of 2 has been determined by single-crystal X-ray diffraction. The rhodium atom is at the center of a square planar geometry having the phosphorus and selenium atoms of the chelating ligand at cis-position, one carbonyl group trans- to selenium and one chlorine atom trans- to phosphorus atom. 1 and 2 undergo oxidative addition (OA) reaction with CH3I to produce acyl complexes (3) and (4), respectively. The kinetics of the OA reactions reveal that 1 undergoes faster reaction by about 4.5 times than 2. The catalytic activity of 1 and 2 in carbonylation of methanol was higher than that of the well known species [Rh(CO)2I2]− and 2 shows higher catalytic activity compared to 1. 相似文献
18.
At room temperature, the chain-like polymeric copper (II) complexes bridged by bis (diphenylphosphino oxide) ethane (dppeO2), [Cu(dppeO2)X2]n[X=Cl(1), Br(2)] have been prepared and characterized by elemental analysis, 31P NMR, TG-DTA and X-ray analysis for [ CuBr2 (dppeO2) ] n The chain is composed of subunits containing tetrahedron coordinated copper (II) atoms. The four-coordinated copper (II) atom is ligated to another four-coordinated copper (II) atom through dppeO2. The coordination sphere of copper(II) atom is completed by two monodentate bromide and two oxygen atoms from bridging dppeO2. Crystal data are as follows: C26-H24CuP2BnO2, 0.50 mm× 0.40 mm×0.40 mm, monoclin-ic, space group: C2/c, λ= 0.07107 nm(Mo Ka), a = 1.2286(2) nm, b=2.0555(8) nm, c = 1.0652(2) nm, β = 97.366(9)°, V = 2.668nm3, Z = 4, Dcalc = 1.628 g·cm-3, R = 0.066; Rw = 0.091. 相似文献
19.
Reaction of 1,1′-bis(diphenylphosphino)ferrocene (dppf) with [μ-(SCH2)2NCH2CH2OH]Fe2(CO)6 (A) or [μ-(SCH2)2NCH2CH2SAc]Fe2(CO)6 (C) in refluxing xylene yielded an intramolecular bridging complex [μ-(SCH2)2NCH2CH2OH]Fe2(CO)4(μ-dppf) (1) or [μ-(SCH2)2NCH2CH2SAc]Fe2(CO)4(μ-dppf) (2) in moderate yield. The structures of both complexes were fully characterized by spectroscopic methods and X-ray crystallography, and the electronic structure of 2 was further investigated by UV–vis. The cyclic voltammetry was conducted and the reduction of protons from CF3SO3H (TfOH), HBF4·Et2O, or CF3COOH (TFA) catalyzed by 2 was observed. 相似文献