Synthesis and Structural Characterization of Bis(2,2'-bpy)bis(azide)cobalt(III) nitrate dihydrate

The title complex [CoIII(2, 2?-bpy)2(N3)2]@NO3@2H2O was obtained by an auto-oxidization reaction of cobalt nitrate with 2, 2?-bpy and sodium azide in aqueous solution at room temperature, and violet single crystals were prepared in ethanol solution. The structure was determined by X-ray crystallography. The crystal is of triclinic, space group P ī with a = 8.285(4), b = 11.990(8), c = 12.596(7) ?, ( = 86.630(3), ( = 86.280(5), ( = 71.130(10)°, C20H20CoN11O5, Mr = 553.40, Z = 2, V = 1180.6(12) ?3, F(000) = 568, Dc = 1.557 g/cm3, ( = 0.784 mm-1, R = 0.0403 and wR = 0.1008. The title complex consists of a [CoⅢ(2, 2?-bpy)2(N3)2]+ cation, a NO3- anion and two lattice water molecules. The center CoⅢ ion coordinated by two chelating 2, 2?-bpy ligands and two terminal azide groups with a CoN6 coordination environment exhibits a distorted octahedral geometry.     

二维配位聚合物[K_2(5-nbdc)_2Cd(Ⅱ)·imH·H_2O]_∞的合成和晶体结构(英文)

In recentyears,asym m etric organic ligands (suchas m 鄄pyridinecarboxylates) have been used as bi/tri鄄dentate bridges to build chiral coordination polym ersofCd髤orZn髤forexploring non鄄linearopticalm ate鄄rials[1]. In these reported coordination polym     

Novikov-Poisson代数和它们的张量积

本文给出Ｎｏｖｉｋｏｖ－Ｐｏｉｓｓｏｎ代数的定义和例子，介绍了它们的张量积理论，对于两个给定的Ｎｏｖｉｋｏｖ－Ｐｏｉｓｏｎ代数的张量积构造了一个Ｎｏｖｉｋｏｖ－Ｐｏｉｓｏｎ代数结构和一个Ｎｏｖｉｋｏｖ－Ｐｏｉｓｓｏｎ代数模的结构．     

实二次域Q(√p)(p≡3(mod4))类数的上界

设p是适合p≡3(mod4)的奇素数,h,分别是实二次域Q(√p)的类数和基本单位.本文运用初等方法证明了:εh<(p+a+2)a+2/4(a+2)!,其中a=[(√p+1)/2].     

Synthesis and Crystal structure of Poly{[Co(4,4''-bpy)(H2O)4]SO4((4-abaH)2(3H2O}

The title complex has been obtained by the reaction of cobalt sulfate heptahydrate with 4,4'-bpy and 4-abaH (4,4'-bpy = 4,4'-bipyridine, 4-abaH = 4-aminobenzonic acid) in ethanol solution, and its structure was determined by X-ray crystallography with the following data: tetragonal, space group P42/n, Mr = 5692.46, Co8C192H288N32O120S8, a = b = 16.402(5), c = 22.750(5) (A), Z = 1, V = 6120(2) (A)3, F(000) = 2968, Dc = 1.544 g/cm3,μ = 0.707 mm- 1, the final R = 0.0786 and wR = 0.1935 for 2673 observed reflections (I ＞ 2σ(I)). The title complex consists of polymeric [Co(4,4'-bipy)(H2O)4]2+ cation chains, SO42- anions, lattice 4-abaH and water mole cules. The center CoⅡ ions are connected by bridging 4,4'-bpy ligands exhibiting one-dimensional chains, and coordinated by four water molecules into a distorted octahedral geometry. These chains are further extended by hydrogen bonds among SO42- anions, coordinated and lattice water molecules as well as lattice 4-abaH molecules into a three-dimensional network.     

特征0无穷维单Novikov代数的非奇异模

本文证明了每一个A-模是一个平凡模和一个非奇异模的直和;给出了两类特征0无穷维单Novikov代数的非奇异模的结构定理.     

关于Q(4k~(2n)+1)的理想类群的循环子群

设ｄ,ａ,ｋ,ｎ是适合４ｋ２ｎ＋１＝ｄａ２,ｋ＞１,ｎ＞２,ｄ无平方因子的正整数;又设Ｃ（Ｋ）和ｈ（Ｋ）分别是实二次域Ｋ的理想类群和类数．本文证明了：当ａ＜０．５ｋ０．５６ｎ时,则ｈ（ｋ）＝０（ｍｏｄｎ）和Ｃ（Ｋ）必有ｎ阶循环子群．     

A Complete Clasification of Finite－DimensionalSimpleNovikovAlgebrasofCharactertisticp

ＡＣｏｍｐｌｅｔｅＣｌａｓｉｆｉｃａｔｉｏｎｏｆＦｉｎｉｔｅ┐ＤｉｍｅｎｓｉｏｎａｌＳｉｍｐｌｅＮｏｖｉｋｏｖＡｌｇｅｂｒａｓｏｆＣｈａｒａｃｔｅｒｔｉｓｔｉｃｐＣｈｅｎＨｏｎｇｊｉ（陈宏基）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，Ｈｕｉｚ...