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1.
1 INTRODUCTION Recently, functional models for oxo-bridged diiron (Ⅲ) complexes have received much attention[1, 2]. They provide structural models for diiron sites in several proteins involved in oxygen storage of hemerythrin[3] and oxygen activation of methane monooxygenase[4]. In addition, several synthetic FeOFe (-oxo) diiron(Ⅲ) complexes show catalase-like activity[5, 6]. One of our studies in this respect is trying to synthesis -oxo bridged diiron complexes. The compound [Fe(ph…  相似文献   

2.
谢学群  杨春龙  李前进 《结构化学》2007,26(9):1009-1012
The title compound [Mn(DPMT)2Cl2(H2O)2] (DPMT = 1-[[2-(2,4-dichlorophenyl)- 1,3-dioxolan-2-yl]methyl]-1H-1,2,4-triazole) was synthesized by the reaction of MnCl2·4H2O and DPMT in ethanol solution and its structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group P21/c with a = 23.913(4), b = 7.8883(13), c = 8.6291(14) , β = 95.816(3)o, V = 1619.4(5) 3, Z = 2, C24H26Cl6MnN6O6, Mr = 762.15, Dc = 1.563 g/cm3, μ = 0.950 mm-1, S = 1.045, F(000) = 774, R = 0.0462 and wR = 0.0981. The molecular structure is a centrosymmetric conformation, and two ligands are symmetrically located on both sides of the Mn atom. The manganese atom is surrounded by two nitrogen atoms from ligands, two chlorine atoms and two oxygen atoms from water molecules to form a slightly distorted octahedral geometry.  相似文献   

3.
1 INTRODUCTION Salicylaldehyde salicyloylhydrazone (SHSH) and their deviatives show moderate fungicidal and anti- bacterial activities[1]. Rao has reported some novel lanthanoid complexes of salicylaldehydrazone. Va- rious polyhedral geometries such as distorted octa- hedron, pentagonal bipyramid and distorted square antiprism were tentatively proposed for the com- plexes used as excellent semi-conducting materials[2]. Tang has studied spectrofluorimetric determination of hydrogen perox…  相似文献   

4.
1INTRODUCTION The chemistry of molybdenum-sulfur compounds has attracted the attention from chemists,bioinor-ganic chemists and biochemists because Mo and S are important elements of metal enzymes especially N2-ase[1~6].Since the di-molybdenum(0)thiolate com-pound with a[Mo2S2]2?unit core and two-electron transfer character,[Et4N]2[Mo2(SR)2(CO)8](R=Ph,tBu),was synthesized by introducing thiolate ligands into Mo(CO)6[7],the chemistry of complexes conta-ining low valence molybdenum at…  相似文献   

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1INTRODUCTIONMetal-oxoclusterchemistryhasbeenactivelypurchasedduetotheinterestinchemistryitselfanditsvariousapplicationsinfieldssuchascatalysis,electronicconductivity,magnetism,nonlinearopti-calpropertiesandmedicine[1~3].Recently,anim-portantadvanceinmet…  相似文献   

8.
何翔  卢灿忠  张全争 《结构化学》2005,24(2):159-162
1 INTRODUCTION The design and synthesis of metal-organic frame-work structure have been studied widely during thepast decade not only because of their intriguing ar-chitectures but also their unexpected properties forpotential practical applications in a wide number offields, such as asymmetric catalysis, magnetism, pho-toluminescence and so on[1~3]. These novel struc-tures can be rapidly and efficiently synthesized fromsimple subunits, where the metal ions, bi- or multi-dentate organic l…  相似文献   

9.
1 INTRODUCTION Transition metal Schiff base complexes have been extensively studied in the past two decades for their various crystallographic features, enzymatic reactions, steric effects[1~4], catalysis and magnetic properties[5, 6] as well as their important role in organisms[7, 8]. Most of these first-row materials are biologically essential with a number of their complexes showing bioactivities[9, 10]. Herein we describe the synthesis and X-ray structure of the cadmium (Ⅱ) compl…  相似文献   

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11.
新型六核双网兜状簇合物[MoS4Cu5Br3(Py)7]的合成与晶体结构   总被引:1,自引:0,他引:1  
以(NH4)2[Mo2S12]?H2O与过量CuBr在吡啶溶液中反应,得到了一个新型六核Mo/Cu/S簇合物[MoS4Cu5Br3(Py)7]。X-射线单晶结构分析表明它属于三斜晶系,空间群为P?C35H35Br3Cu5MoN7S4,Mr=1335.37,a=11.6274(4),b=12.0127(4),c=18.8872(5),a=82.46(2),b=73.25(2),g=62.800(13),V=2246.8(2)?,Z=2,F(000)=1300.0,Dc=1.974g/cm3,?=5.482mm-1,5718个独立可观察点(I>3(I)),最终偏离因子R和Rw分别为0.042和0.048。标题化合物是由2个相似的网兜状MoS3Cu3簇核通过共用MoSCuS平面形成的双网兜状结构,Mo…Cu距离在2.6830(11)~2.741(2)胖洹?  相似文献   

12.
The title compound 9-amino-7-(2-chlorophenyl)-6H-benzo[c]thiochromene-8,8,10(7H)-tricarbonitrile DMF solvate(C25H20ClN5OS,Mr = 473.97) was synthesized and crystallized.The crystal belongs to triclinic,space group P1 with a = 7.6393(2),b = 10.5212(3),c = 15.0573(4) ,α = 86.797(1),β = 79.445(1),γ = 75.379(1)°,Z = 2,V = 1151.16(5) 3,Dc = 1.367 g.cm-3,μ(MoKα) = 0.285 mm-1,F(000) = 492,R = 0.0389 and wR = 0.1005 for 3455 observed reflections(I > 2σ(I)).X-ray analysis reveals that the new six-numbered ring(C(1)-C(6)) forms a skew boat conformation.The molecule links a molecule of DMF via the N(1)-H(1A)...O(1) hydrogen bond,while another hydrogen bond C(23)-H(23A)...N(2) links adjacent molecules,forming dimmers along the a axis.  相似文献   

13.
1 INTRODUCTION Trinuclear molybdenum complexes with Mo3(3-S)(-O)n(-S)3n (n = 0~3) cores have been extensively studied on their diversified reactions towards various organic ligands and many metals. Many derivatives with Mo3S4 core have been rationally synthesized from the cation precursor [Mo3S4(H2O)9]4+ and its neutral derivative Mo3(3-S)(-S)3(DTP)4(H2O)[1]. However, due to their structural lability, complexes with Mo3(3-S)(-O)n(-S)3n (n = 1~3) cores have been reported limitedl…  相似文献   

14.
1 INTRODUCTION The chemistry of polyoxometalates continues to attract interest as a result of their realized and potential applications in diverse fields, such as cata- lysis, analysis, biochemistry, medicine and material science[1~3]. In the past few …  相似文献   

15.
1 INTRODUCTION Recently polynuclear iron (Ⅲ) clusters have attracted considerable attention in bioinorganic chemistry due to their presence in the protein ferritin and the related materical hemosiderin[1, 2]. The binuclear oxo-bridge non-haem iron com- plexes (containing the FeⅢOFeⅢ unit) which provide models for the diiron site in the protein involved in the storage (haemrythrin) and on the reductive activation (methanemonoxygenas, ribonclectidereductas) of dioxygen[3,4]. Also, wel…  相似文献   

16.
The title compounds 4a~c were synthesized and characterized by IR,NMR and MS.The crystal structure of C16H13ClN4O2·HBr·H2O(I),the quaternary ammonium salt of 4c,was determined by X-ray diffraction analysis.I crystallizes in triclinic,space group P1 with a = 8.3121(8),b = 9.3885(8),c = 13.2903(12),α = 106.788(2),β = 95.204(3),γ = 110.871(2)o,V = 905.81(14)3,Z = 2,C16H16BrClN4O3,Mr = 427.68,Dc = 1.568 g/cm3,F(000) = 432.00,μ = 2.446 mm-1,R = 0.0496 and wR = 0.127.X-ray analysis reveals that C(15) in the BrCH2COOH molecule binds to the N(1) of pyrimidine ring to form the quaternary ammonium salt.Two adjacent I molecules are connected by hydrogen bonds through carboxylate oxygen,water molecule and hydrobromic acid.  相似文献   

17.
合成了标题化合物MoC9H6NO2O2C9H6NO=8羟基喹啉测定了化合物的晶体结构。晶体属单斜晶系空间群Cca=13.3723b=9.4212c=13.5543β=109.713°V=1607.683。结构由直接法解出最后可靠性因子R=0.0473Rw=0.062。Mo原子为6配位位于八面体的中心。两个配体氧相互处于邻位分别与8羟基喹啉中的N原子处于对位。  相似文献   

18.
A cluster complex of the composition [Th(DMSO)8Cl][Re6Se7Cl7] has been obtained by interaction of ThCl4 solution in DMSO with a water solution of K3[Re6Se7Cl7] and KCl. The compound crystallizes in the rhombic space group Pbcm with unit cell parameters a = 12.262(2) Å, b = 19.653(6) Å, c = 23.603(6) Å, V = 5688(2) Å3, Z = 4, d calc = 3.282 g/cm3. The structure is built from centrosymmetric cluster anions [Re6Se7Cl7]3? and complex cations [Th(DMSO)8Cl]3+ possessing mirror-plane symmetry, half of the DMSO ligands being doubly disordered.  相似文献   

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20.
刘泉  徐庆锋  张勇  陈金香  周志峰  郎建平 《中国化学》2002,20(12):1602-1607
IntroductionThechemistryofthethiometallateanionsiscurrentlyasubjectofintenseinterestduetotheirrichstructuraldi versity ,1 8theirrelevancetoindustrialcatalyticprocess9,10andmetalloenzymes ,11,12 andtheirpotentialutilityasnon linearopticalmaterials .13 16Wehaverep…  相似文献   

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