混配配合物[Zn(C6H5COCHCOCF3)2(C5H4NOH)]的合成、晶体结构及表征

用醋酸锌、苯甲酰三氟丙酮和3-羟基吡啶在甲醇介质中反应合成了混配配合物[Zn(C₆H₅COCHCOCF₃)₂(C₅H₄NOH)]，用元素分析、红外光谱、核磁共振氢谱和热重分析等技术对其进行了表征，并用X-射线单晶衍射仪测定了其晶体结构。该晶体属于三斜晶系，空间群为P1。配合物中锌离子位于四方锥的中心，2个苯甲酰三氟丙酮基负离子以烯醇式一价阴离子形式与锌离子发生双齿配位，配体3-羟基吡啶上的芳氮原子与锌离子发生单齿配位，形成五配位环境的4O+N型混配配合物。     

混配配合物[Zn(CF3COO)2(C7H6NS)2]的合成、晶体结构及表征

A mixed complex [Zn(CF₃COO)₂(C₇H₆NS)₂] was synthesized based on the reaction of Zn(CF₃COO)₂ and 2-aminobenzothiazol (C₇H₆NS) in methanol. The structure of the complex was characterized by elemental analysis, IR, ¹H NMR and thermal analysis. The crystal structure of the complex was determined by X-ray single crystal diffraction. The crystal belongs to monoclinic system with space group C2/c, a=3.174 3(9) nm, b=1.010 0(3) nm, c=1.723 1(5) nm, β=118.841(4)°, V=4.839(2) nm³; D_c=1.625 g·cm^-3; Z=8; F(000)=2 368; μ=1.266 mm^-1. CCDC: 600233.     

水介质中无催化剂下醛酮与活泼亚甲基化合物的缩合反应

报道了水相中无催化剂下各种羰基化合物与活泼亚甲基化合物的Knoevenagel缩合反应. 芳香醛与活泼亚甲基化合物如丙二腈、氰基乙酸乙酯、氰基乙酰胺的缩合在室温下即能顺利进行, 获得了很高的收率; 而对于杂环芳醛、α,β-不饱和的醛以及脂肪醛与活泼亚甲基化合物的缩合, 需在50～65 ℃下进行, 也取得了很高的收率; 对于脂肪酮、芳香酮以及二元醛与丙二腈的缩合在75～85 ℃下也能顺利地进行, 获得中等以上的收率. 反应简单、高效而且对环境友好.     

Synthesis, Characterization and Crystal Structure of a Three-dimensional Coordination Polymer {[Cd(1,5-nds)(Him)2(H2O)]·2H2O}n

A novel cadmium(Ⅱ) coordination polymer {[Cd(1,5-nds)(Him)2(H2O)]·2H2O}n (1,5-nds = naphthalene-1,5-disulfonate and Him = imidazole) was synthesized based on the reaction of cadmium oxide and 1,5-naphthalenedisulfonic acid firstly, and then mixed with imidazole in methanol medium. Its structure was characterized by elemental analysis, IR and TGA, respectively. The crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P, with a = 8.5420(10), b = 10.2570(10), c = 13.361(2)(A), α = 100.704 (2), β = 100.195(2), γ = 108.873(3)°, C16H20Cd N4O9S2, Mr = 588.91, V = 1.0524(2) nm3, Dc = 1.858 g/cm3, Z = 2, F(000) = 592, μ= 1.294 mm-1, R = 0.0397 and wR = 0.1007 for 3180 observed reflections (I > 2σ(I)). Structural analysis shows that the cadmiun atom is coordinated with four oxygen atoms from three 1,5-nds and one water molecule together with two nitrogen atoms from two imidazoles, giving a distorted octahedral coordination geometry. The molecules are linked to form a two-dimensional coordination polymer based on bridging ligands of naphthalene-1,5-disulfonate anions, the sheets of which are then interacted via hydrogen bonds, leading to a three-dimensional network structure.     

Pomeron-Quark Coupling from Charge Conjugation Invariance

Based on the charge conjugation invariance and the vazuum property of the Pomeron, we point out that the commonly used vector vertex of the Pomeron coupling to quarkis incorrect since it contradicts with the Pomeron property. We also claim that the soft Pomeron could be a tensor glueball ξ（2230） with quantum numbers I^GJ^PC = 0^＋2^＋＋ and total decay width Гtot ≌ 100 MeV, which lies on the soft Pomeron trajectory αp = 1.08＋ 0.20t. Therefore, the coupling vertex of the soft Pomeron to quark should be tensorial which is invariant under the charge conjugation and can explaIn why the inadequate vector coupling, γ^μ, of the soft Pomeron to quark is successful in dealing with Pomeron physics.     

二价钌有机螯合物Ru(dpphen)2+3与花生酸混合LB膜的结构及光谱特性

对不同组分的Ru(dpphen)     

Pomeron as a Reggeized Tensor Glueball

We study gluonic content of the pomeron and propose that the pomeron could be a reggeized tensor glueball ζ(2230) with quantum numbers IG JPc = 0 2 .This conjecture is examined in high energy proton-proton elastic scattering,and the calculations lend a favorable support to our physical idea.``     

Synthesis and Crystal Structure of Novel Sn-O Clusters Generated from nBu2SnO and Esters

A facile and credible strategy was demonstrated to synthesize two new Sn-O clusters 1 and 2 by the reactions of nBu2SnO with esters directly under mild conditions.Cluster 1 crystallizes in the triclinic system,space group P1 with a = 13.054(3),b = 13.137(3),c = 15.077(3) ,α = 80.009(9),β = 77.187(10),γ = 76.075(11)°,Z = 2,V = 2427.3(9) 3,Dc = 1.565 g/cm3,μ(MoKα) = 2.076 mm-1,F(000) = 1152,the final R = 0.0335 and wR = 0.0664 for 9416 observed reflections(I 2σ(I)).Cluster 2 belongs to the monoclinic system,space group P21/c with a = 13.673(3),b = 13.342(3),c = 16.296(4) ,β = 104.385(5)o,Z = 4,V = 2879.7(10) 3,Dc = 1.347 g/cm3,μ(MoKα) = 1.751 mm-1,F(000) = 1176,the final R = 0.0306 and wR = 0.0706 for 6390 observed reflections(I 2σ(I)).The crystal structures of the clusters consist of cen-trosymmetric [RCOOSnnBu2OSnnBu2OH)]2 molecules with an almost planar Sn4O4 framework.Each pair of exo-and endo-cyclic tin atoms was linked by one bridge-OH only.In addition,a novel structure of nBu2SnO different from the previous reports was proposed on the basis of 1H-NMR,TG analysis and X-ray diffraction.