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11.
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. 相似文献
12.
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 相似文献
13.
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. 相似文献
14.
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]. 相似文献
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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. 相似文献
17.
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. 相似文献
18.
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. 相似文献
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设p是适合p≡3(Pod4)的奇素数,h,ε分别是实二次域Q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 相似文献