新型含草酰胺桥基的[14]N_4大环的Cu(Ⅱ)-M(Ⅱ)(M=Cu,Ni)双核配合物合成与磁性

合成和表征了四个新的大环上含有草酰胺桥基的双核配合物[Cu(η-L1）ML22］(ClO4)2·nH2O,其中L1为2 ,3 －二羰基－5 ,6 ： 13, 14-二苯基-1 ,4 ,8 , 11－四氮杂十四环－7 , 11－二烯;L2 ＝乙二胺（en）,M=Cu(1),M=Ni（2）;L2 = 1 ,10－邻菲咯啉（phen）,M=Cu(3),M=Ni(4)。测定了配合物（3）和（4）的变温磁化率（4 ．2 －300K）,求得磁参数分别为（3）J＝－99．1 cm－1 和（4）J＝-47．0 cm-1,表明Cu（Ⅱ）、-Cu（Ⅱ）、Cu（Ⅱ）-Ni（Ⅱ）离子间存在反铁磁自旋交换相互作用。     

草酰胺桥联大环二羰四胺Cu(Ⅱ)-M(Ⅱ)(M=Mn,Ni,Cu,Zn)异双核配合物的合成与表征

合成了四种新型具有草酰胺桥联大环二羰四胺结构Cu(Ⅱ ) -M(Ⅱ ) (M =Mn ,Ni,Cu ,Zn)的双核配合物 ,并用元素分析 ,红外光谱 ,紫外光谱 ,摩尔电导 ,热重分析 ,室温磁矩等手段对其进行了结构表征 .经研究推定 ,此配合物具有草酰胺桥联结构 ,Cu(Ⅱ )处于平面正方场M(Ⅱ )处于八面体场中 .室温磁矩测定表明通过草酰胺桥联配体金属离子间有一定的反铁磁性自旋偶合相互作用     

1, 2－亚丙基双(草酰胺根)桥联的线性三核铜(Ⅱ)配合物的合成与磁性

本文合成和表征了四种新的三核铜（Ⅱ）配合物）Ｃｕ（Ｌ）２，Ｃｕ（ＣＨ３－ｅｂｏ）（ｃｌＯ４）２（ＣＨ３ｅｂｏ表示１，２－亚丙基双（草酰胺根），Ｌ表示１，１０－菲咯啉（ｐｈｅｎ）（１），５－ｄｉｅｇａｄ －１，１０－ａｄｊｄｋｔｋ ｋｓｓｙ（ＮＯ２－ｐｈｅｎ）（２），２，２＇－联吡（ｂｐｙ（３）和４，４－二甲基－２，２－联吡啶（ｍｅ２ｂｐｙ）（４）．测定了四种配合物的变温磁化率＊７７－３００Ｋ），求     

二硫代草酰胺和二环己酮草酰二腙桥联的双核Cu(Ⅱ)-Cu(Ⅱ)配合物的合成和磁性Ⅰ.

Three new binuclearcopper(Ⅱ) complexesbridged by dithio-oxamidate(dto) group or biscyclohexanone oxalyldihydrazone (BCO)[Cu₂(en)₂(dto)](Cl O₄)₂·3H₂O(1)、[Cu₂(dien)₂(dto)](ClO₄)₂·2H₂O (2) and [Cu₂ (bipy)₂(BCO)(Cl O₄)₂](ClO₄)₂(3),where en, bipy and dien denote ethylenediamine,2,2′-bipyridyl and diethylentriamine respectively, were synthesized and characterized by elemental analysis,IR,electronicspectra and variable temperature magnetic susceptibility. Variable temperature (4.0-300K) magnetic susceptibility data for the complexes show that there exists the antiferromagnetic exchange interaction between the two copper(Ⅱ) ionswith J(cm^-1) valuesof-0.462 (1)、-1.03 (2) and -6.86 (3). The preliminary study of the electrochemical characteristicsof complex (3) was also carried out.     

水杨酰胺合铜(Ⅱ)酸根和5-硝基-1, 10-菲绕啉配位的Cu(Ⅱ)-Ni(Ⅱ)配合物的合成和磁性

本文合成了两个新型双核配合物,[Cu(samcn)Ni(L)₂]和[Cu(sampn)Ni(L)₂].samcn^4-,sampn^4-及L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和5-硝基-1,10-菲绕啉(NO₂-phcn).经元素分析,IR和电子光谱等方法已推定配合物具有酚氧桥结构和Cu(Ⅱ)及Ni(Ⅱ)的配位环境分别为平面四方及八面体构型.配合物的变温磁化率已测(4-300K),其数值已用最佳拟合方法和从自旋哈密顿算符,H=-2JS₁·S₂导出的磁方程拟合,求得交换参数为J=-1.77cm^-1(samcn)和J=-1.74cm^-1(sampn),表明两个Cu(Ⅱ)-Ni(Ⅱ)双核配合物中有很弱的反铁磁性自旋交换相互作用.     

μ-草酰二胺Cu(Ⅱ)-Fe(Ⅱ)双核配合物的合成与磁性

合成和表征了两种含草酰胺桥的新型异双核配合物［Cu(oxae)Fe(tmen)₂］SO₄(a)和［Cu(oxpn)Fe(tmen)₂］SO₄(b)。变温磁化率(4～300K)测量和磁分析表明两个Cu(Ⅱ)-Fe(Ⅱ)双核配合物中金属离子间有中等强度的反铁磁超交换作用。     

二硫代草酰胺和二环己酮草酰二腙桥联的双核Cu(Ⅱ)-Cu(Ⅱ)配合物的合成和磁性Ⅰ.

在众多桥联配体中 ,二硫代草酰胺有独特的性质 ,其衍生物与各种金属形成单核或多核配合物已有较多报道 ,但以二硫代草酰胺 (H2 dto)作桥联基的双核铜配合物的合成报道仍较少[1 ] 。本文以 H2 dto作桥联基 ,乙二胺 (en)或二乙烯三胺 (dien)作端接配体 ,合成了两个新的双核配合物 [Cu2 (en) 2 (dto) ](Cl O4) 2 .3H2 O(1)和 [Cu2 (dien) 2 (dto) ](Cl O4) 2 .2 H2 O(2 ) ,另外用二环己酮草酰二腙 (BCO)作桥联基 ,以 2 ,2′-联吡啶作端接配体 ,合成了一个新型草酰胺类双核铜配合物 [Cu2 (bipy) 2 (BCO) (Cl O4) 2 ](Cl O4) 2 (3) ,研…     

两种不对称草酰胺桥联双核铜(Ⅱ)配合物的合成及电化学性质

合成了两种新型草酰胺桥联双核铜配合物 ,并以元素分析、红外光谱、电子光谱、摩尔电导、热重分析和室温磁矩对所合成铜配合物进行表征 ,推定新合成的双核铜配合物具有草酰胺桥联结构 .采用循环伏安法测定了双核配合物的氧化还原电位 ,表明两种配合物均显示一个单电子还原过程 .     

新型草酰胺桥联Cu(Ⅱ),Ni(Ⅱ)均双核配合物的合成及表征

合成了一种新配体N ,N′ 二 (2 氨乙基 ) 草酰胺双缩邻氨基苯甲醛Schiff碱 (H4L)及其Cu(Ⅱ )、Ni(Ⅱ )均双核配合物。并用元素分析、红外光谱、电子光谱、室温磁化率等对其组成和结构进行表征。室温磁矩表明配合物中两金属离子间通过草酰胺桥存在着反铁磁性自旋偶合作用。     

含草酰胺桥的Cu(Ⅱ)-Fe(Ⅱ)和Cu(Ⅱ)-Zn(Ⅱ)双核配合物的合成、磁性及生物活性

抗菌活性;含草酰胺桥的Cu(Ⅱ)-Fe(Ⅱ)和Cu(Ⅱ)-Zn(Ⅱ)双核配合物的合成、磁性及生物活性     

Schiff 碱双核配合物的磁性及催化性能的研究

This paper reports the catalytic properties of “porphyrin-like” Schiff base mononuclear complexes MH₂L {M=Mn(Ⅱ), Fe(Ⅲ)Cl, Cr(Ⅲ)Cl, Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ); L=bis[N, N′-ethylene-2, 2′-(phenylmethylene)bis(3,4-dimethylpyrrole-5-aldimino)]} and dinuclear complexes MnML [M=Mn(Ⅱ), Fe(Ⅲ)Cl, Cr(Ⅲ)Cl, Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ)] for cyclohexane monooxygenation with PhIO and magnetic properties of the dinuclear complexes. The magnetic investigations (4～300 K) of the dinuclear complexes revealed that their antiferromagnetic spin exchange with J ranged from -10.49 to -0.482 cm^-1 except MnZnL and antiferromagnetic spin exchange decreased in the following order: Mn^Ⅱ-Cu^Ⅱ > Mn^Ⅱ-Ni^Ⅱ > Mn^Ⅱ-Mn^Ⅱ > Mn^Ⅱ-Fe^Ⅲ > Mn^Ⅱ-Co^Ⅱ > Mn^Ⅱ-Cr^Ⅲ. The results of catalyzed oxidation of cyclohexane indicated that the catalytic property of the dinuclear complex was better than that of the corresponding mononuclear complex. It was found that there was the synergism decreased in the order: Mn-Fe > Mn-Cr > Mn-Cu > Mn-Mn > Mn-Co> Mn-Ni > Mn-Zn. It seems that this synergism increases with the increase of the number of unpaired d electrons and the magnetic exchange between the two metals in these dinuclear complexes.     

草酰胺桥联异三核配合物Cu(NiL)2(ClO4)2的合成、光谱表征和晶体结构(英)

A novel oxamido-bridged trinuclear complex Cu(NiL)₂(ClO₄)₂(where H₂L=2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,3-dien) has been synthesized and characterized by elemental analysis, IR spectrum, UV-Visible spectrum and single crystal X-ray diffraction. It crystallizes in the monoclinic system, space group P2₁/n. The lattice parameters are: a=1.052 4(6) nm, b=1.182 1(6) nm, c=1.586 2(9) nm, β=91.657(9)°, and V=1.972 6(19) nm³, Z=2. The results show that the coordination geometry around copper(Ⅱ) in the title complex is hexa-coordinated octahedron. CCDC: 232608.     

丁二酮肟双核铜配合物的合成、结构和性能表征

The structure of [Cu₂(Hdmg)₄] (Hdmg=dimethylglyoxime anion) has been determined by X-ray crystallog-raphy. It is monoclinic, space group P2₁/n, with Z=2. The lattice parameters: a=0.71601(14)nm; b=1.7044(3)nm; c=1.0126(4)nm; β=113.89(2)°; M_r=587.52 (C₁₆H₂₈Cu₂N₈O₈); V=1.1299(5)nm³. The copper atom lies in a distorted square-pyramidal environment. The four equatorial donors are four nitrogen atoms from bidentate chelate dimethylglyoxime anion ligands. The oxygen atom from the dimethylglyoxime ligand acts as a bridging atom occupying the apical position of the symmetry-related copper atom in the dimer structure. The two dimethylglyoximes bridge two copper atoms to form a six-member Cu₂O₂N₂ ring, respectively. The thermal gravity (TG) data indicate that the compound [Cu₂(Hdmg)₄] undergoes two exothermic reactions with loss of the organic ligand to give residue CuO. CCDC: 208729.     

Dinuclear copper(II) complexes with different bridging connectors

One novel triply-bridged dicopper(II) complex formulated as [Cu₂(dpa)₂(μ-Cl)(μ-OH)(μ-HCOO)]·(ClO₄) 1 and two terephthalate anions bridged 2,2′-bipyridine (2,2′-bpy) dicopper(II) complexes with formulae of [Cu₂(2,2′-bpy)₄(μ-terephthalate)]·(NO₃)₂2 and [Cu₂(2,2′-bpy)₄(μ-terephthalate)]·(terephthalate) 3, respectively, have been synthesized and characterized by infrared and electrospray mass spectra as well as X-ray single-crystal determination. In addition, thermal properties of all compounds have been studied.     

手性双核Salen配合物的合成与谱学性质

Six novel chiral dinuclear Salen complexes [Cu₂L₁·H₂O (3a), Cu₂L₂(3b), Ni₂L₁·2H₂O (4a), Ni₂L₂(4b), Mn₂Cl₂L₁·H₂O (5a), Mn₂Cl₂L₂ (5b)] have been synthesized(L₁ and L₂ are chiral dimeric Salen ligands with different chain length which were synthesized from (R,R)-diaminocyclohexane, salicylaldehyde, 4,4′-(1,10-decaneoxy)salicylaldehyde, 4,4′-(1,6-hexyloxy)salicylaldehyde). These compounds were charactered by elemental analysis, ¹H NMR, FT-IR, UV-Vis and CD spectra. The FT-IR, UV-Vis and CD spectra were discussed and compared with those of monomeric ligand and complex in detail. It was found that the spectra properties of compounds of different chain length were almost alike, and the properties of dimeric and monomeric compound were similar too. Furthermore Cotton effect and Cotton split of CD spectra of these chiral compounds were explained by the exciton interaction theory. It seemed that the direction of Cotton split depend on the configuration of diaminohexane. (R,R)-diaminohexane determine the chirality of Salen compounds as negative, and the positive and negative component of Cotton split lie at higher and lower energy respectively.     

Pendant-Arm Macrocycles Derived from the Cyclocondensation Reaction of Sodium 2,6-Diformyl-4-substitutedphenolates and Tris-(2-aminoethyl)amine Derivatives. Preparation, Characterization and Properties of their Dinuclear Copper(II) Complexes

A series of pendant-arm Schiff base macrocycles have been obtained via the cyclocondensation reaction between sodium 2,6-diformyl-4-substitutedphenolates and tris-(2-aminoethyl)- amine derivatives followed by transmetallation with Cu(ClO₄)₂·6H₂O. The resulting dinuclear copper(II) complexes have been characterized by elemental analysis, infrared and mass spectra as well as magnetic moments at room temperature. All complexes have been electrochemically investigated, and two typical compounds have been studied with ESR spectra as well.     

Dinuclear Complexes with Predictable Magnetic Properties

When two paramagnetic transition metal ions are present in the same molecular entity, the magnetic properties can be totally different from the sum of the magnetic properties of each ion surrounded by its nearest neighbors. These new properties depend on the nature and the magnitude of the interaction between the metal ions through the bridging ligands. If both ions have an unpaired electron (e.g. Cu²⁺ ions), then the molecular state of lowest energy is either a spin singlet or a spin triplet. In the former case, the interaction is said to be antiferromagnetic, in the latter case ferromagnetic. The nature and the order of magnitude of the interaction can be engineered by judiciously choosing the interacting metal ions and the bridging and terminal ligands, and, thus, by the symmetry and the delocalization of the orbitals centered on the metal ions and occupied by the unpaired electrons (magnetic orbitals). The first success in this “molecular engineering” of bimetallic compounds was in the synthesis of a Cu²⁺VO²⁺ heterobimetallic complex in which the interaction is purely ferro-magnetic. The same strategy could be utilized for designing molecular ferromagnets, one of the major challenges in the area of molecular materials. Another striking result is the possibility of tuning the magnitude of the interaction through a given bridging network by modifying the nature of the terminal ligands, which, in some way, play the role of “adjusting screws”. By careful selection of the bridging and terminal ligands, a very large antiferro-magnetic interaction can be achieved, even if the metal ions are far away from each other. Some sulfur-containing bridges are especially suitable in this respect.     

含双水杨醛Schiff碱配体的双核配合物的合成及晶体结构

合成了4个含双水杨醛Schiff碱配体的双核过渡金属配合物,并通过元素分析、红外光谱、紫外光谱,热重分析以及X-射线单晶衍射等手段对所得配合物进行了表征。结果表明,配合物1、3和4都属于三斜晶系,空间群为P1,而配合物2属于单斜晶系,空间群为C2/c。在配合物1中,2个Cu髤离子具有不同的配位构型,其中一个Cu髤形成了五配位的四角锥构型,而另一个Cu髤形成了平面正方形构型。配合物4中,通过酚氧原子的桥联作用,双核单元相互连接形成了一维链状结构。