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A new nickel(Ⅱ)-dicyanamide compound, [Ni(dca)2(en)]n (1) (dca=dicyanamide anion, [N(CN)2]-); en=ethylene diamine), has been synthesized and its structure has been determined by single crystal X-ray diffraction analysis. The crystal is monoclinic, space group P21/n with unit cell dimensions: a=0.694 3(1) nm, b=1.041 5(2) nm, c=1.4132(2) nm, and β=90.381°, Z=4, V=1.011 0(3) nm3. In this compound, the adjacent nickel atoms are connected by dca all in μ1,5-bridging mode to form ladder-like units, which are linked with double dca bridges to generate a regular infinite stair-like structure. Temperature-dependent magnetic susceptibility was also characterized for this compound. CCDC: 208276. 相似文献
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The title complex {[AgL]ClO4}n(L=2,5-bis(3-pyridinylmethylthio)-1,3,4-thiadiazole) was synthesized by the reaction of Ag(I) salt and a novel flexible ligand L.Its structure was determined by X-ray crystallography with the following data:monoclinic,space group P21/n,a=16.5068(13),b=7.6548(4),c=16.5521(13),β=115.119(3)o,V=1893.7(2)3,Z=4,Dc=1.893 g/cm3,μ=1.565 mm-1,F(000)=1072,C14H12AgClN4O4S3,Mr=539.78,T=293(2) K,S=1.067,the final R=0.0342 and wR=0.0870.The silver ion in the complex is in a trigonal coordin... 相似文献
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Two comparable discrete complexes [CuⅡ(CH3CN)2L2]·2(ClO4) 1 and [CuI2I2L2]·(DMF)2 2 were successfully synthesized by the reaction of CuⅡ and CuⅠ salts with a novel dinucleating ligand 2,5-bis(3-pyridinylmethylthio)-1,3,4-thiadiazole)(L),respectively.Complex 1 presents a single nuclear structure while 2 has a dimeric structure where two CuI ions are doubly bridged by halide ions in a μ2-fashion.Both discrete molecules were outspreaded into a one-dimensional supramolecular chain via aromatic interactions such as C-H…π and π…π interactions. 相似文献
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二维网格结构的新型配位聚合物[Zn(PDA)]n的合成、晶体结构及荧光性质 总被引:3,自引:2,他引:1
以2,6-吡啶二酸为配体, 与锌盐通过水热合成法得到具有二维网格结构的新型配位聚合物[Zn(PDA)]n(PDA=2,6-吡啶二羧酸根); 采用红外光谱、元素分析、热重分析及单晶X射线衍射等手段对[Zn(PDA)]n的晶体结构进行了表征. 并进一步研究了[Zn(PDA)]n的荧光性质. 相似文献
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The reaction of lanthanum(Ⅲ) nitrate and 5-nitroisophthalic acid in isopropanol/H2O under hydrothermal conditions leads to a 3D lanthanum-containing coordination polymer with the general chemical formula {[La6(Nip)9(H2O)4 ]·(H2O)4 }∞(1,Nip=5-nitroisophthalate).The single-crystal X-ray analyses show that this compound crystallizes in the orthorhombic system,space group Ima2 with a=9.7769(12),b=28.239(3),c=21.149(2),V=5839.1(11)3,Z=2,Mr=2859.61,Dc =1.626 g/cm 3,F(000)=2752.14040 reflections are collected,of which 5275 are unique (R int=0.0241).Final GOOF=1.083,R=0.0406 and wR=0.1182,R indices based on 5183 reflections with I>2σ(I)(refinement on F2),443 parameters,1 restraint.Lp and absorption corrections were applied,=2.242mm-1.Absolute structure parameter x=0.08(3).The crystal structure can be described as the butterfly-liked hexanuclear lanthanum entities {La6O6(CO2)8 } covalently linked to each other by nitroisophthalate ligands into an intricate three-dimensional structure.The fluorescence spectroscopy of compound 1 has been investigated. 相似文献
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1 INTRODUCTION The design and synthesis of metal-organic coor- dination polymers are of current interest owing to their intriguing architectures and potential applica- tions, such as catalysis, fluorescence and magne- tism[1~4]. Many transition metal-organic polymers have been synthesized and exhibit interesting magneticproperties[5~9]. Among them, coordination polymers constructed by dicarboxylate ligands have attracted considerable attention due to their rich coordination modes and di… 相似文献
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采用非溶液法制备了原子级分散的Fe-N-C催化剂, 并用于硫醚和二级醇的选择性氧化. 研究结果表明, 这种原子级分散的Fe-N-C催化剂可在温和条件下选择性地将硫醚转化为亚砜, 而不会产生过度氧化的砜. 该工艺具有反应条件温和、 反应速度快、 收率高等优点; 该催化剂对二级醇氧化制酮反应具有较高的催化活性, 产率较高. 作为一种非均相催化剂, Fe-N-C催化剂循环使用5次后活性未见显著下降; 在实验结果和参考文献的基础上还提出了一种可能的自由基反应机理. 相似文献
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6-(3,5-Dimethylpyrazol-1-yl)-3-(2,4,6-trinitroanilino)-1,2,4,5-tetrazin (1) has been synthesized and characterized by ^1H NMR, MS, elemental analysis, infrared spectra and thermal analyses. The crystal structure was determined by X-ray diffraction method. 1 is crystallized in P21/c space group of monoclinic crystal system, and exhibits good physical properties, such as high densities (〉 1.55 g·cm^-3) and good thermal stabilities (Td〉220 ℃). The intrermolecular hydrogen bonds construct the P- and M-helices from organic molecules and may contribute to the high melting points. 相似文献
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A three-dimensional complex [Cu(3-ampy)(H2O)4](SO4)·(H2O) (3-ampy = 3-amino- pyridine) has been synthesized. Crystallographic data: C5H16CuN2O9S, Mr = 343.80, triclinic, space group P1, a = 7.675(2), b = 8.225(3), c = 10.845(3) A, α = 86.996(4), β = 76.292(4), γ = 68.890(4)°, V = 620.0(3) A3, Z = 2, Dc = 1.841 g/cm3, F(000) = 354 and μ = 1.971 mm-1. The structure was refined to R = 0.0269 and wR = 0.0659 for 1838 observed reflections (I > 2σ(I)). The structure consists of [Cu(3-ampy)(H2O)4]2+ cations, SO42- anions and lattice water molecules. 3-Ampy acting as a bidentate bridging ligand generates a 1D covalent chain. A supramolecular 2D framework is formed through π-π stacking of pyridine rings. The lattice water molecules and SO42- anions are located between the adjacent 2D frameworks. The hydrogen bonding interactions from lattice water molecules and SO42- anions to coordinate water extend the 2D framework into a 3D network. 相似文献
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