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A three-coordinate Ag(I) complex, [Ag(Mepzpy)(PAr3)]BF4·H2O(1, Mepzpy = 3-methyl-1-(2-pyridyl)pyrazole, PAr3 = tri(o-tolyl)phosphine), was synthesized from the reaction of Ag(CH3CN)4BF4, PAr3 and Mepzpy in CH3 CN at room temperature. The compound was characterized by UV-vis, NMR and X-ray single-crystal structure analysis. It crystallizes in triclinic space group P1 with a = 10.2251(5), b = 10.6014(5), c = 15.7012(5) , α = 92.963(3), β = 92.641(3), γ = 114.647(4)o, V = 1540.6(1) 3, Z = 2, Mr = 676.24, Dc = 1.458 g/cm3, F(000) = 688, μ = 6.187 mm-1, GOOF = 1.038, the final R = 0.0530 and w R = 0.1493 for 6371 observed reflections with I 2σ(I). Compound 1 is ionic. It is composed of a BF4- anion and a [Ag(Mepzpy)(PAr3)]+ cation. The Ag(I) ion adopts a distorted trigonal pyramidal coordination geometry defined by two nitrogen atoms and a phosphorous atom. The complex emits blue luminescence with maximum peaks at 470 nm in solid state at room temperature. 相似文献
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A novel coordination complex,{[Cd)2(C_(20)H_(10)O_5)_2(H_2O)_4]·10H_2 O}_n,has been synthesized based on fluorescein(2-(6-hydroxy-3-oxo-3 H-xanthen-9-yl) benzoic acid) and systematically characterized by elemental analysis,infrared(IR) spectrum,thermo gravimetric analysis(TGA),powder X-ray diffraction(PXRD) and single-crystal X-ray diffraction.Compound 1 crystallizes in monoclinic,space group P2/n with a = 20.428(5),b = 8.084(2),c = 21.689(5) ?,β = 96.360(5)o,M_r = 993.46,V = 3559.7(15) ?~3,Z = 4,D_x = 1.845 g/cm~3,μ = 1.276 mm-1,F(000) = 1974,GOOF = 1.044,λ(Mo Kα) = 0.71073 ?,the final R = 0.0553 and wR = 0.1720 for 7245 observed reflections with I 2σ(I). 相似文献
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本文描述了两个具有相似阴离子骨架的化合物,[Na2(H2O)10(NH4)4][V10O28](1)和[Na2(H2O)10(NH4)4][V9MoO28](2).化合物1的阴离子是一个常见的钒十骨架,而化合物2与化合物1是同晶异质体,化合物2的阴离子是混有一个钼原子的钒十骨架.X-射线晶体结构测定表明,这两个化合物均属于三斜晶系,P1空间群.晶胞参数分别为化合物1a=0.86024(4)nm,b=1.04561(5)nm,c=1.12828(4)nm,α=68.833(1)°,β=87.158(1)°,γ=67.065(1)°;化合物2a=0.86511(3)nm,b=1.04549(5)nm,c=1.12446(5)nm,α=69.071(1)°,β=87.145(1)°,γ=66.982(1)°. 相似文献
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1INTRODUCTION More and more chemists have currently been inte-rested in the transition metal oxides(so-called polyoxometalates)mainly owing to their structural varieties and promising potential applications in catalysis,biology,medicine and materials science[1].Of the various polyoxometalate structures,the most interesting one is the molybdate family with a va-riety of structural polymers including{Mo2},{Mo4},{Mo6},{Mo8}.etc.These molybdate polymersmight act as versatile building blocks … 相似文献
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1 INTRODUCTION The contemporary studies on POMs reveal theirspecial properties which endow these materials withwide range of applications, such as catalysis, medi-cine[1], material science[2], etc. Current research inte-rest mainly focuses on the development of solid ma-terials with unusual structural complexity and con-comitant diversity of applicable properties. A series ofmolybdate oxide phases have been synthesized, inwhich the polymolybdate anions are linked intoinfinite 1-, 2- or 3… 相似文献
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The paper reports the formation and crystal structure of dihydronitidine, expounds thereasons and conditions of easily formed oxynitidine, and discusses anticancer mechanism ofnitidine (cation). The crystallographic parameters of dihydronitidine are: space group P2_(1/n),a= 12.54(1), b = 9. 148(5), c = 14.748(8)A, β= 92. 12(6)°,Z =4. 4108 independent reflec-tions were collected within the range of 3°≤2θ≤54°, of which 2137 intensity data with I≥3σ(I) were used in the structural determination. The crystal structure has been refined byfull matrix least-square method to a final R of 0.050. 相似文献
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1INTRODUCTIONPolyoxometallates(POM)areofgreatinterestnotonlyfortheirstructuralvarietybutalsotheirunexpectedproperties[1,2].Theseinorganicanionshavebeenwidelyinvestigatedasdiversascatalysis,biology,medicine,magnetochemistryandmaterialscience[3~7].Thestudiesonthecoordinatedpoly-oxometallateswithorganicligandsmighthelptounderstandtherolesofpolyoxometallatesoncatalysis.Todate,aseriesofoctamolybdateswhichcanbedescribedas[Mo8O26X2]2n-4(nisthenormalchargeofthecoordinatedbaseX)havebeenreport… 相似文献
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1 INTRODUCTIONThestudiesonorganicpolyoxometallateshelptounderstandtherolesofpolyox ometallatesoncatalysis.Aseriesofoctamolybdateswithdescription〔Mo8O2 6X2 〕2n -4(nisthenormalchargeofthecoordinatedbaseX)havebeenreportedinliteratures .Theirstructuresoftheα ,β ,γ … 相似文献