Cu(Ⅱ)-VO(Ⅱ),Cu(Ⅱ)-Cr(Ⅲ)和Cu(Ⅱ)-Fe(Ⅲ)异双核配合物的合成及表征

合成了三种二 ( 3 羧基水杨醛叉 )缩丙撑二胺 (TS)的Cu(Ⅱ ) VO(Ⅱ )、Cu(Ⅱ ) Cr(Ⅲ )、Cu(Ⅱ ) Fe(Ⅲ )异双核配合物 ,并用元素分析、摩尔电导、IR光谱、UV光谱室温磁矩对配合物的组成和结构进行了表征。磁性研究表明 ,在Cu(Ⅱ ) Fe(Ⅲ )离子间的磁相互作用是反铁磁性的 ,而Cu(Ⅱ ) VO(Ⅱ )、Cu(Ⅱ ) Cr(Ⅲ )离子间是铁磁性相互作用。     

Cu(Ⅰ) and Cu (Ⅱ) helical complexes formed with oligobipyridine ligand

A new asymmetric oligobipyridine ligand, 1-(5'-methyl-2, 2'-bipyridin-5-yl)-2-(6'-methyl-2, 2'-bipyridin-6-yl)ethane (L), in which the bipyridine units are bridged by CH_2CH_2 at 5, 6'-position has been synthesized. The ligand L reacts with Cu(Ⅰ) and Cu(Ⅱ) ions giving double-stranded helical complexes [Cu_2~ⅠL_2] (ClO_4)_2·Et_2O (1) and [Cu_2~ⅡL_2 (OH) (H_2O)][ClO_4]_3(2), respectively. Complexes 1 and 2 were characterized by X-ray diffraction analyses, ES-MS, ESR and cyclic voltammetry, etc. Differing from the oligobipyridine ligands bridged by CH_2CH_2 at 6,6'-or 5,5'-position, the ligand L not only forms a double-stranded helicate with Cu(Ⅰ) ion, but also gives a double-stranded helicate with Cu(Ⅱ) ion. The results show that the linkage mode of the spacer group to the bipyridine units exerts a great impact on the formation of helix.     

Synthesis,crystal structure,thermal decomposition,and XPS studies of homo and heterotrinuclear Cu(II)–Cu(II)–Cu(II) and Cu(II)–Ni(II)–Cu(II) complexes obtained from salpn type ligands

In this study, a mononuclear CuL complex was prepared by the use of bis-N,N′-(salicylidene)-1, 3-propanediamine (LH₂) and Cu²⁺ ion. NiCl₂ and NiBr₂ salt were treated with this complex in dioxanewater medium and two new complexes [(CuL)₂NiCl₂(H₂O)₂] and [(CuL)₂NiBr₂(H₂O)₂)] with Cu(II)–Ni(II)–Cu(II) nucleus structure were obtained. In addition to this bis-N,N′-(2-hydroxybenzyl)-1,3-diaminopropane (L^HH₂) was prepared by the reduction of LH₂ with NaBH₄ in MeOH medium. The treatment of this reduced complex with Cu²⁺ ion resulted a complex [(CuL^H)₂CuCl₂] with a structure of Cu(II)–Cu(II)–Cu(II). The complexes prepared were characterized by the use of elemental analysis, IR spectroscopy, thermogravimetric and X-ray diffraction methods. The crystal structures of [(CuL)₂NiBr₂(H₂O)₂] (СIF file CCDC 1448402) and [(CuL^H)₂CuCl₂] (СIF file CCDC 1448401) complexes were elucidated. It was found that halogen ions are coordinated to terminal Cu²⁺ ions which are in a distorted square pyramid coordination sphere. It was determined that the central Cu(II), which joins terminal square pyramidal Cu(II), was coordinated only by the phenolic oxygens of the ligand while the central Ni(II) was coordinated by two phenolic oxygens of the organic ligand and two water molecules. These complexes were investigated by XPS and it was found that the terminal and central Cu²⁺ ions were different in Cu(II)–Cu(II)–Cu(II) complex. Also, the thermal degradation of the CuLH complex unit was observed to exothermic in contrast to the expectations.

     

Cu(Ⅱ)Fe(Ⅲ)Cu(Ⅱ)异三核配合物的合成及表征

合成了三种以草酸根为桥联配体的异三核配合物。经元素分析、红外光谱、电子光谱、摩尔电导及室温磁矩对配合物的组成和结构进行了表征。研究表明 ,在Cu(Ⅱ ) Fe(Ⅲ ) Cu(Ⅱ )离子间存在着反铁磁相互作用。     

Crystal Structures of Cu(Ⅰ) and Cu(Ⅱ) Complexes of Tris(N-n-propylbenzimidazol-2-ylmethyl)amine

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｃｏｎｔｒｏｌｅｄｄｅｓｉｇｎｏｆｓｏｌｉｄ－ｓｔａｔｅａｒｃｈｉｔｅｃｔｕｒｅｓａｎｄｃｒｙｓｔａｌｅｎｇｉｎｅｅｒｉｎｇｈａｓｃｕｒｒｅｎｔｌｙｂｅｅｎｒｅｃｏｇｎｉｚｅｄａｓｏｎｅｏｆｔｈｅｍｏｓｔｉｍｐｏｒｔａｎ...     

不对称双席夫碱Cu(II)同双核及Cu(II)-Mg(II)- Cu(II)异三核配合物的合成与晶体结构

近年来的研究表明，某些过渡金属Schiff碱配合物具有抗菌、抗癌、抗病毒活性。不对称Schiff碱配合物因其特殊的结构和性质正日益受到人们的关注^[3]。但由于不对称双Schiff碱及其配合物的合成及单晶培养比较困难，国内有关其合成与结构的报道较少。我们曾首次合成了不对称双Schiff碱配合物HCuL (H₃L为N-3-羧基水杨醛-N^/-水杨醛-缩乙二胺)及其多个异三核配合物^[1，2]，本文报道的是该系列同双核配合物(HCuL)₂(1) 及Cu(II)-Mg(II)-Cu(II)异三核配合物（2），并通过X-射线衍射的方法解析了两个配合物的晶体结构。配合物1的晶体属单斜晶系，Cc空间群，晶胞参数为a=2.5326(5)nm, b=0.88861(18)nm, c=1.3738(3)nm, β =96.95(3)°, Z=4, R1=0.0520,wR2=0.0968, 此配合物是两个HCuL分子通过酚氧桥联而形成的双聚分子。配合物2的晶体属单斜晶系， Pc空间群，晶胞参数为a= 1.1816(2)nm, b=1.5599(3)nm, c=1.9642(4)nm, β =98.22°, Z=2, R1=0.0701,wR2=0.1498，其晶格的每个不对称单元包含两个异三核中性分子[CuL(H₂O)]Mg[CuL(CH₃OH)]}和{[CuL]Mg[CuL(H₂O)]}     

牛血清白蛋白与Cu(Ⅱ)、Cu(Ⅰ)相互作用的表面电化学研究

采用循环伏安法,研究了牛血清白蛋白(BSA)吸附到玻碳电极上构成的BSA修饰电极.考察了铜离子在BSA修饰电极上的电化学行为.结果表明,Cu(Ⅱ)、Cu(Ⅰ)通过非疏水(静电或者共价)作用与电极表面的BSA结合,Cu~(2+)在BSA修饰电极上与BSA的结合能力比Cu~+与BSA的结合能力强,使用该方法探究蛋白与金属离子、小分子的作用是可行的.     

FERROMAGNETICALLY COUPLED Gd(III)Cu(II)Gd(III)TRINUCLEAR COMPLEXES

ＦＥＲＲＯＭＡＧＮＥＴＩＣＡＬＬＹ ＣＯＵＰＬＥＤ Ｇｄ（ＩＩＩ）Ｃｕ（ＩＩ）Ｇｄ（ＩＩＩ） ＴＲＩＮＵＣＬＥＡＲ ＣＯＭＰＬＥＸＥＳ￥ＭｉｎｇＭｉｎｇＭＩＡＯ；ＤａｉＺｈｅｎｇＬＩＡＯ；ＺｏｎｅＨｕｉＪＩＡＮＧ；ａｎｄＧｅｎｇＬｉｎＷＡＮＧ（Ｄｅｐ...     

漫话新制的Cu(OH)2

高中有机化学中的重要试剂——"新制的Cu(OH)2",是一个特定的模糊的表述,之所以特定,是指该试剂是一种检验醛基存在的弱氧化剂;之所以模糊,是把该试剂当成一种Cu(OH)2的悬浊液(事实上分散系中并没有悬浊的Cu(OH)2).     

Ferrocenyl β-diketonato-based Cu(II)-oxo clusters with Cu7 and Cu10 cores

Crystallization of [Cu(β-diketonate)(PPh₃)₂] (1a, β-diketonate=1-ferrocenyl-butane-1,3-dionato (= fb); 1b,?=?1,3-diferrocenyl-propane-1,3-dionato (= dfp)) from ethanol, layered with a mixture of pentane/diethyl ether of ratio 1?:?1 (v/v) in air, afforded Cu(II)-oxo clusters [Cu₁₀(fb)₈(O)₄(tmdd)₂]·1.5Et₂O (2) and [Cu₇(dfp)₆(O)₂(OH)₂(tmdd)]·2Et₂O (3), respectively, in minor yield (tmdd?=?1κ ² C,3κ ² C-tetramethyldisiloxane-1,3-diolato). These clusters were obtained in somewhat better yield when HOSiMe₂OSiMe₂OH was added to the crystallization mixtures. The molecular structures of 2 and 3 in the solid state are reported.     

Cu(Ⅱ)-桑色素-十六烷基三甲基溴化铵荧光体系测定微量Cu(Ⅱ)的研究

在H2SO4介质中,以十六烷基三甲基溴化铵(CTMAB)为增敏剂,微量Cu(Ⅱ)对桑色素的荧光具有明显的增强作用,据此建立了测定微量Cu(Ⅱ)的新方法。当最大激发波长和发射波长分别为417nm和497nm时,Cu(Ⅱ)在4.0~20ng/mL浓度范围内与桑色素荧光强度变化值(△F)呈线性关系,其检出限为0.39ng/mL。对12ng/mL Cu(Ⅱ)进行12次平行测定,相对标准偏差为0.76%。方法可用于不同环境水样中微量Cu(Ⅱ)的测定,回收率在96.1%~102.9%之间。     

Halogen Mediated Self-assembly of Three Mixed Valent Cu(Ⅰ)/Cu(Ⅱ) Complexes

Reaction of the ligand dmpt(dmpt=6,7-dimethylbenzo[f][1,10]phenanthroline)with CuCl_2 afforded mixed valent Cu(Ⅰ)/Cu(Ⅱ) discrete tetranuclear complexes[Cu(Ⅱ)Cl_2(dmpt)Cu(Ⅰ)Cl](1),while the reaction of ligand dppz(dppz = dipyrido[3,2-a:20,30-c]phenazine) with divalent halogen copper salt CuX_2(X=Cl,Br) gave one-dimensional chain mixed valent Cu(Ⅰ)/Cu(Ⅱ) complexes [Cu(Ⅱ)Cl_2(dppz)Cu(Ⅰ)Cl]_n(2) and discrete mixed valent Cu(Ⅰ)/Cu(Ⅱ)complexes [Cu(Ⅱ)Br_2(dppz)(DMF)Cu(Ⅰ)Br](3). Complex 2 consists of a one-dimensional chain-dppzC u(Ⅱ)-Clμ_2-Cu(Ⅰ)-Cl-dppzC u(Ⅱ)-Clμ_2-Cu(Ⅰ)-with Cu(Ⅱ) and Cu(Ⅰ) atoms linked together by chloride anion. Complex 3 is a discrete complex,which is the same as complexes 1 and 2 involving two different copper valent Cu(Ⅰ) and Cu(Ⅱ). The Cu(Ⅰ) ion presents a pseudo-trihedral geometry,while the Cu(Ⅱ) ion presents a slightly distorted square-pyramidal geometry. This fact proved that halogen ions play a vital role in the assembly procedure. Our research results demonstrate the structural diversification that can be achieved by halogen ions mediated. Moreover,halogen ions-mediated self-assembly may provide useful information for further design of compounds with novel structures and properties.     

含酚氧桥的新型Cu(Ⅱ)-Mn(Ⅱ)和Cu(Ⅱ)-Co(Ⅱ)配合物的合成和磁性

合成了3种新型配合物[Cu(samen)Mn(NO_(2-)Phen)_2](1)、[Cu(sampn)Mn(NO_(2-)Phen)_2](2)和[Cu(samen)CO(terp)](3)(samen~(4-)、sampn~(4-)、NO_(2-)Phen和terp分别表示N,N′-乙二水杨酰胺根阴离子、N,N′-1,2-丙二水杨酰胺根阴离子、5-硝基-1,10-菲绕啉和联三吡啶),测得配合物的变温磁化率,求出交换积分,J分别为-63cm~(-1)(1)、—65cm~(-1)(2)和—7.68cm~(-1)(3),表明金属离子间有反铁磁超交换作用。     

Die Kristallstrukturen von β-TaNi3, Ta(Cu,Al)2, Nb(Cu,Al)2 und Ta6(Cu,Al)7

Zusammenfassung Neben der bekannten Phase TaNi₃ mit TiCu₃-Typ wird eine Kristallart gleicher Zusammensetzung gefunden, die mit TiAl₃ isotyp ist. Ta(Cu, Al)₂ und Nb(Cu, Al)₂ kristallisieren im MgZn₂-Typ (Laves-Phase). Ta₆(Cu, Al)₇ ist eine -Phase.     

CRYSTAL STRUCTURES OF TWO DITHIOLATO-COPPER COMPLEXES (Ph_4P)Cu(BDT)_2 AND (Ph_4P)Cu(TDT)_2

<正> [(C6H5)4P]Cu(S2C6H4)2(Ⅰ),Mr = 683. 39,monoclinic,space group C2/c,a=16. 099 (4),b= 11. 913(3) ,c = 16: 715(9) A ,β=97. 13(4)°, v = 3180. 7 A3,z=4.MoKa radiation,λ= 0. 71069A ,Dc= 1. 427g/cm3,μ= 10. 1cm-1,F(000) = 1400,R=0. 061 and Rw = 0. 068 for 2189 reflections with Ⅰ>3σ(Ⅰ). [(C6H5)4P]Cu (S2C7H6)2(Ⅰ),Mr = 711. 45,monoclinic,space group C2/c,a=16. 501(6),b = 37. 461 (15),c=16. 684(4)A,β=96. 70(4)°, v= 10248. 8(46) A3,z= 12. MoKa radiation, λ= 0. 71069A,Dc=1.383g/cm3,μ=9. 45cm-1,F(000).= 4416,R= 0. 074 and Rw= 0. 078 for 2085 reflections with I>2σ(I)(1). The copper atom in the complexes is surrounded by four sulfur atoms from two dithiolato ligands in an approximate, square-plane. The average Cu-S distances of the copmplexes(Ⅰ) and (Ⅱ) are 2. 179 and 2. 178 A, respectively.     

First example of a Cu(I)-(η2-O,O)nitrite complex derived from Cu(II)-nitrosyl

Copper(II) complex, 1, of the bidentate ligand, L [L = bis(2-ethyl-4-methyl-imidazol-5yl)methane] has been synthesized and structurally characterized. Addition of nitric oxide gas to a degassed acetonitrile solution of 1 yielded the corresponding copper(ii)-nitrosyl complex, 2. In acetonitrile, complex 2 on reaction with water afforded the corresponding copper(I)-nitrite complex, 3. Single crystal structure of complex 3 reveals the bidentate nitrite (η(2)-O,O) bonding. This is the first example of a structurally characterized Cu(I)-(η(2)-O,O)nitrite complex with N-donor ligand. The sequence of the formation of these complexes is just the reverse of the key steps of the postulated nitrite reduction cycle by CuNiRs.     

Cu(I)- and Cu(II)-catalyzed cyclo- and Michael addition reactions of unsaturated β-ketoesters

The α-alkylidene β-ketoesters 2-carbethoxycyclopentenone (1a) and ethyl 2-benzoylacrylate (1b) react with 1,2-dimethylbutadiene (2) (Diels-Alder), N-benzyl-N-(cyclohexylethynyl)-4-methylbenzenesulfonamide (3) (Ficini reaction), ethynyl(phenyl)sulfane (4) ([2 + 2] cycloaddition), and 1,2,5-trimethyl-1H-pyrrole (5) (Michael addition) in the presence of copper(I) (6) or copper(II) triflate (7) (1-2 mol %) in dichloromethane. This convenient protocol converts 1a and 1b to the corresponding cycloaddition (8-10) or Michael addition (11) products in good yields after reaction times of 0.5-3 h without requiring purified solvents or inert gas atmosphere.     

Cu(en)_2Ag(SCN)_3的晶体结构

Cu(en)_2Ag(SCN)_3系棱柱状蓝紫色晶体,晶胞参数:a=7.126(2),b=12.587(5),c=17.585(5);空间群为P2_12_12_1;Z=4;ρobs.=1.90,ρcalc.=1.96克/厘米~3。在CAD-4四圆衍射仪上收集到1430个独立衍射点。晶体结构由三维Patterson函数和电子密度函数解出,经全矩阵最小二乘方精修,偏离因子R=0.036。结构分析的结果表明,晶体中的Ag原子由硫氰酸根的S原子按畸变四面体方式配位,其中有二个S原子分别为相邻两个Ag原子所共有,从而使一个一个的AgS_4四面体共有顶点,沿着α轴方向无限延伸。Cu原子系四方单锥配位,由两个乙二胺的N原子形成平面正方形配位(Cu—N_(en)=1.998～2.024);另外,一个SCN的N原子处在正方形的上方,形成Cu原子的四角锥构型,其与Cu原子的距离略长些(Cu—N_(SCN)=2.388)。