含有氮杂环的酰腙配合物Cu(C15H11BrN2O4)(C5H5N)的合成和晶体结构

0 引 言 Schiff碱及其金属配合物,因其具有较强的生物活性以及良好的催化作用而倍受人们的关注[1,2].     

含有氮杂环的酰腙配合物Cu（C15H11BrN2O4）（C5H5N）的合成和晶体结构

0引言 Schiff碱及其金属配合物,因其具有较强的生物活性以及良好的催化作用而倍受人们的关注。芳酰腙是一种特殊的Schiff碱,与金属离子形成的配合物具有抗炎、抗病毒、杀菌抑霉等活性,有些还是较好的荧光分析试剂等。酰腙的配合物已广泛应用于不对称催化、分析测定等众多领域。最近Ravoof等合成了6个含有氮杂环吡啶的酰腙铜配合物,     

5-溴水杨醛缩乙醇胺Schiff碱Cu(II)配合物的合成和晶体结构

The title complex Cu(L)₂ [HL=N-(5-bromosalicylidene)-2-aminoethanol] was synthesized by the reaction of Cu(CH₃COO)₂·H₂O with N-(5-bromosalicylidene)-2-aminoethanol in the ethanol. It was characterized by elemental analysis, IR and X-ray single crystal diffraction analysis. The crystal of the title complex [Cu(C₉H₉BrNO₂)₂] belongs to monoclinic, space group P2₁/n with a=1.319 1(5) nm, b=0.444 58(16) nm, c=1.656 7(6) nm, β=91.226(5)°, V=0.971 46(6) nm³, Z=2, D_c=1.879 Mg·m^-3, μ=5.264 mm^-1, F(000)=542, and final R₁=0.045 6, wR₂=0.097 0. The complex comprises a four-coordinated copper(II) center, with an N₂O₂ planar coordination environment. The molecules are connected by hydrogen bonds to form two-dimensional layered structure. CCDC: 274180.     

Single Transverse Spin Asymmetries at Parton Level

Two factorization approaches have been proposed for single transverse spin asymmetries. One is the cofiinear factorization, the other is the transverse-momentum-dependent factorization. They have been previously derived in a formal way by using diagram expansion at hadron level. If the two factorizations hold or can be proven, they should also hold when we replace hadrons with patton states. We examine these two factorizations at patton level with massless partons. It is nontrivial to generate these asymmetries at parton level with massless patrons because the asymmetries require helicity-flip and nonzero absorptive parts in scattering amplitudes. By constructing suitable patton states with massless partons we derive the two factorizations for the asymmetry in Drell-Yan processes. It is found from our results that the collinear factorization derived at parton level is not the same as that derived at hadron level. Our results with massless partons confirm those derived with single massive parton state in our previous works.     

小横动量半深度非弹性散射的量子色动力学因子化

论证了在小横动量区域内半深度非弹性散射量子色动力学因子化公式. 为完成因子化, 引进了依赖于横动量的部分子分布函数和碎裂函数, 并扣除了软胶子辐射. 在单圈图的情形下, 证明了因子化的成立, 同时论证了在微扰论的任意阶该因子化的正确性.