N,N'-乙二水杨酰胺合铜(II)酸根和N,N'-1,2-丙二水杨酰胺全铜(II)酸根的双核Cu(II)-Fe(III)配合物的合成和磁性

本文合成了四个新型双核配合物、[Cu(samen)Fe(L)Cl]和[Cu(sampn)Fe(L)Cl]。经元素分析、IR, 电导、磁性测量等手段推定配合物具有酚氧桥结构, Cu(II)及Fe(III)的配位环境分别为平面四方及四角锥的构型, Fe(III)离子的自旋态S=3/2。测定了配合物[Cu(samen)Fe(L)Cl]的变温磁化率(4-300K), 参数J和θ值表明两个双核配合物中金属离子之间有中等程度的反铁磁性超交换作用和双核单元之间有弱的分子间相互作用。     

N,N′-乙二水杨酰胺合铜(Ⅱ)酸根和N,N′-1,2-丙二水杨酰胺合铜(Ⅱ)酸根的双核Cu(Ⅱ)-Fe(Ⅲ)配合物的合成和磁性

本文合成了四个新型双核配合物、[Cu(samen)Fe(L)Cl]和[Cu(sampn)Fe(L)Cl].经元素分析、IR,电导、磁性测量等手段推定配合物具有酚氧桥结构,Cu(II)及Fe(III)的配位环境分别为平面四方及四角锥的构型,Fe(III)离子的自旋态S=3/2.测定了配合物[Cu(samen)Fe(L)Gl]的变温磁化率(4—300K),参数J和θ值表明两个双核配合物中金属离子之间有中等程度的反铁磁性超交换作用和双核单元之间有弱的分子间相互作用.     

N,N'-1,2-丙二水杨酰胺合铜(II)酸根的双核Cu(II)-Ni(II)配合物的合成和磁性

本文合成了两个新的双核配合物, [Cu(sampu)Ni(L)2], sampn^4^-表示N,N'-1,2-丙二水杨酰胺阴离子, L表示2,2-联吡啶(bpy)或1,10-菲咯啉(phen),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), 其数值用最小二乘法和从自旋哈密顿算符H=-2JS1S2导出的磁方程拟合, 求得交换参数为J=-1.90cm^-^1(pby)和J=1.68cm^-^1(phen), 表明两个Cu(II)-Ni(II)双核配合物中有弱的反铁磁自旋交换相互作用。     

N,N'-双水杨酰代乙二胺合铜(II)酸根和N,N'-1,2-双水杨酰代丙二胺合铜(II)酸根的Cu(II)-Co(II)双核酸合物的合成和磁性

本文合成了两个新型双核配合物, [Cu(Samen)Co(L)2]和[Cu(Sampn)Co(L)2], Samen^4^-表示N,N'-双水杨酰代乙二胺根阴离子,Sampn^4^-表示N,N'-1,2-双水杨酰代丙二胺根阴离子, L表示5-硝基-1,10-菲咯啉(NO2-Phen)。经元素分析, IR和电子光谱等推定配合物具有酚氧桥结构,Cu(II)及Co(II)的配位环境分别为平面四方及畸变八面体构型。测定了配合物(4-300K)的变温磁化率, 并用最小二乘法和自旋Hamiltonian算符,H=2JS1.S2-DSzl导出的磁方程拟合, 求得交换参数为J=-4.39(Samen)和-3.59cm^-^1(Sampn), 表明两个Cu(II)-Co(II)双核配合物中有弱的反铁磁性超交换相互作用。     

N,N'-1,2-丙二水杨酰胺合铜(II)酸根的双核Cu(II)-Ni(II)配合物的合成和磁性

本文合成了两个新的双核配合物, [Cu(sampu)Ni(L)2], sampn^4^-表示N,N'-1,2-丙二水杨酰胺阴离子, L表示2,2-联吡啶(bpy)或1,10-菲咯啉(phen),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), 其数值用最小二乘法和从自旋哈密顿算符H=-2JS1S2导出的磁方程拟合, 求得交换参数为J=-1.90cm^-^1(pby)和J=1.68cm^-^1(phen), 表明两个Cu(II)-Ni(II)双核配合物中有弱的反铁磁自旋交换相互作用。     

N,N'-双水杨酰代乙二胺合铜(II)酸根和N,N'-1,2-双水杨酰代丙二胺合铜(II)酸根的Cu(II)-Co(II)双核酸合物的合成和磁性

本文合成了两个新型双核配合物, [Cu(Samen)Co(L)2]和[Cu(Sampn)Co(L)2], Samen^4^-表示N,N'-双水杨酰代乙二胺根阴离子,Sampn^4^-表示N,N'-1,2-双水杨酰代丙二胺根阴离子, L表示5-硝基-1,10-菲咯啉(NO2-Phen)。经元素分析, IR和电子光谱等推定配合物具有酚氧桥结构,Cu(II)及Co(II)的配位环境分别为平面四方及畸变八面体构型。测定了配合物(4-300K)的变温磁化率, 并用最小二乘法和自旋Hamiltonian算符,H=2JS1.S2-DSzl导出的磁方程拟合, 求得交换参数为J=-4.39(Samen)和-3.59cm^-^1(Sampn), 表明两个Cu(II)-Co(II)双核配合物中有弱的反铁磁性超交换相互作用。     

N,N'-双(2-氨基丙基)草酰胺合铜(II)的铜(II)-锰(II)配合物的合成和磁性

合成和表征了两种新的异双核配合物[Cu(oxap)Mn(L)~2](ClO~4)~2, oxap表示N,N'-双(2-氨基丙基)草酰胺根阴离子, L表示1,10-邻菲咯啉(phen)和5-硝基-1,10-邻菲咯啉(NO~2-phen)。测定了配合物的变温磁化率(4.2-300K), 并用最小二乘法和从自旋Hamiltonian算符, ^^H=-2J^^S~1.^^S~2-D^^S~Z~1导出的磁方程拟合。求得交换积分为J=-74.72cm^-^1(phen)和J=-76.39cm^-^1(No~2-phen), 表明两个Cu(II)-Mn(II)双核配合物中有中等强度的反铁磁超交换作用。     

N,N'-双(2-氨基丙基)草酰胺合铜(II)的铜(II)-锰(II)配合物的合成和磁性

合成和表征了两种新的异双核配合物[Cu(oxap)Mn(L)~2](ClO~4)~2, oxap表示N,N'-双(2-氨基丙基)草酰胺根阴离子, L表示1,10-邻菲咯啉(phen)和5-硝基-1,10-邻菲咯啉(NO~2-phen)。测定了配合物的变温磁化率(4.2-300K), 并用最小二乘法和从自旋Hamiltonian算符, ^^H=-2J^^S~1.^^S~2-D^^S~Z~1导出的磁方程拟合。求得交换积分为J=-74.72cm^-^1(phen)和J=-76.39cm^-^1(No~2-phen), 表明两个Cu(II)-Mn(II)双核配合物中有中等强度的反铁磁超交换作用。     

N,N′-双水杨酰代乙二胺合铜(Ⅱ)酸根和N,N′-1,2-双水杨酰代丙二胺合铜(Ⅱ)酸根的Cu(Ⅱ)-Co(Ⅱ)双核配合物的合成和磁性

文合成了两个新型双核配合物,[Cu(Samen)Co(L)_2]和[Cu(Sampn)Co(L)_2],Samen~(4-)表示N,N′-双水杨酰代乙二胺根阴离子,Sampn~(4-)表示N,N＇-1,2-双水杨酰代丙二胺根阴离子,L表示5-硝基-1,10-菲咯啉(NO_2-Phen).经元素分析,IR和电子光谱等推定配合物具有酚氧桥结构,Cu(Ⅱ)及Co(Ⅱ)的配位环境分别为平面四方及畸变八面体构型.测定了配合物(4—300K)的变温磁化率,并用最小二乘法和从自旋Hamiltonian算符,H=2JS_1·S_2-DS_(?)1导出的磁方程拟合,求得交换参数为J=-4.39(samen)和-3.59cm~(-1)(Sampn),表明两个Cu(Ⅱ)-Co(Ⅱ)双核配合物中有弱的反铁磁性超交换相互作用.     

N,N′-乙二水杨酰胺合镍(Ⅱ)酸根的双核镍(Ⅱ)及镍(Ⅱ)-铜(Ⅱ)配合物的合成及性能研究

以N,N′-乙二水杨酰胺合镍酸钠同二价金属离子和2,2-联吡啶(bpy)或1,10菲绕啉(phen)反应制得双核配合物,[Ni(samen)Cu(L)]和[Ni(samen)Ni(L)_2](L=bpy,phen).经元素分析。红外、电子光谱等方法已推定[Ni(samen)]~2-中的Ni(Ⅱ)的配位环境为平面四方型,而被bpy或phen配位的Cu(Ⅱ)和Ni(Ⅱ),分别为平面四方型和畸变八面体构型。 据此,本文指派了配合物的电子光谱,评价了Dq,B,β等配位场参数,并且用配位场理论模型算出了有效磁矩,Ni(Ⅱ)-Cu(Ⅱ)配合物的g_(11),与g_1,结果理论值与实验值相当吻合。     

具有非正规自旋态结构的新型Mn(Ⅱ)-Cu(Ⅱ)-Mn(Ⅱ)三核配合物的合成和磁性

合成和表征了四种新的异三核配合物, {[Mn(L)2]2[Cu(bpa)]{(ClO4)2,其中pba表示为亚丙基-1, 3-双(草胺酸根); L表示1, 10-菲咯啉(phen)、5-硝基-1, 10-菲咯啉(NO2-phen)、2, 2'-联吡啶(bpy)、4, 4'-二甲基-2, 2'-联吡啶(Me2bpy)。基于{[Mn(phen)2]2[Cu(pba)]}(ClO4)2.H2O的变温磁化率测量(4.2~300K), 求出交换积分J=41.5cm^-^1, 表明Mn(Ⅱ)和Cu(Ⅱ)离子间为反铁磁耦合。在XMT-T图上, XMT在175K附近呈现出一极小值, 这是具有非正规自旋态结构的多金属耦合体系的典型特征。     

Synthesis, characterization and magnetism of binuclear cobalt (II) complexes bridged by tetracarboxylato groups

Three new binudear cobalt (II) complexes with extended te-tracarboxylato- bridge have been synthesized and characterized, namely [Co2 (PMTA) (bpy)4] (1), [Co2(PMTA)-(phen)4] (2) and [Co2(PMTA) (NO2phen)4] (3), where PMTA represents the tetraanion of pyroniellitic acid, and bpy, phen, NO2-phen denote 2,2'-bipyridine, 1,10-phenan-throline; 5-nirto-1, 10-plienanthroline, respectively. Based on elemental analyses, molar conductivity measurements, IR and electronic spectra studies, it is proposed that these complexes have PMTA-bridged structures and consist of two cobalt (II) ions, each in a distorted octahedral environment. These complexes were further characterized by variable temperature magnetic susceptibility measurements (4-300 K) and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator, giving the exchange integral J = - 1.02 cm-1 for 1, J = -1.21 cm-1 for 2 and J = - 1.18 cm-1 for 3, respectively. These results revealed the operation of antiferromagneti     

1,3-亚丙基双(草胺酸根)桥联的Gd(Ⅲ)Cu(Ⅱ)Gd(Ⅲ)三核配合物

合成和表征了三种新的异三核配合物, {[Gd(L)2]2[Cu(pba)]}(ClO4)4,其中pba为1,3-亚丙基双(草胺酸根)和L表示1,10-菲咯啉(phen),5-硝基-1,10-菲咯啉(NO2-phen)或2,2'-联吡啶(bpy)。基于{[Gd(phen)2(ClO4)]2[Cu(pba)]}(ClO4)2.2H2O的变温磁化率测量(4.1~300K),求出交换积分J=3.576cm^-^1。表明在铜(Ⅱ)和钆(Ⅲ)离子间存在铁磁性偶合。     

Synthesis and magnetic properties of copper (II)-manganese (II) compounds with N,N′-ethylenedisalicylamidatocuprate(II)

By the reaction of sodium N,N′-ethylenedisalicylamidatocuprate ( I ) pentahydrate, Na₂[Cu(samen)]·5H₂O, with a manganese ( I ) salt and 2,2′-dipyridyl (bpy) or 1,10-phenanthroline (phen), the binuclear metal complexes [Cu(samen) Mn(L)₂] (L ? bpy, phen) have been synthesized. Based on IR, elemental analyses and electronic spectra, the complexes are proposed to consist of a four-coordinated Cu( I ) in a distorted planar environment and Mn( I ) in a distorted octahedron. The complexes have been characterized with variable-temperature magnetic susceptibility (4.2—300 K) and the susceptibility data were least-squares fit to susceptibility equation derived from the spin Hamiltonian including single-ion zero-field interaction for Mn²⁺ ion, H?—2JS₁·S₂—DS, where D is the axial zero-field splitting parameter for the Mn(II) ion. The exchange integral, J, was found to be —34.6 and —28.8 cm^?1 for [Cu(samen)Mn(bpy)₂] and [Cu(samen)Mn(phen)₂] respectively. The weak antiferromagnetic spin-exchange interaction can be interpreted by considering σ-π exchange pathway.     

Formation and reactivity of the Os(IV)-azidoimido complex, PPN[Os(IV)(bpy)(Cl)(3)(N(4))

Reactions between the Os(VI)-nitrido complexes, [OsVI(L2)(Cl)3(N)] (L2 = 2,2'-bipyridine (bpy) ([1]), 4,4'-dimethyl-2,2'-bipyridine (Me2bpy), 1,10-phenanthroline (phen), and 4,7-diphenyl-1,10-phenanthroline (Ph2phen)), and bis-(triphenylphosphoranylidene)ammonium azide (PPNN3) in dry CH3CN at 60 degrees C under N2 give the corresponding Os(IV)-azidoimido complexes, [OsIV(L2)(Cl)3(NN3)]- (L2 = bpy = [2]-, L2 = Me2bpy = [3]-, L2 = phen = [4]-, and L2 = Ph2phen = [5]-) as their PPN+ salts. The formulation of the N42- ligand has been substantiated by 15N-labeling, IR, and 15N NMR measurements. Hydroxylation of [2]- at Nalpha with O<--NMe3.3H2O occurs to give the Os(IV)-azidohydroxoamido complex, [OsIV(bpy)(Cl)3(N(OH)N3)] ([6]), which, when deprotonated, undergoes dinitrogen elimination to give the Os(II)-dinitrogen oxide complex, [OsII(bpy)(Cl)3(N2O)]- ([7]-). They are the first well-characterized examples of each kind of complex for Os.     

New Ni(Ⅱ)Cu(Ⅱ)Ni(Ⅱ) trinuclear complexes with an S=3/2 high-spin ground state

Four new heterotrinuclear complexes have been synthesized and characterized, namely {[Ni(L)2]2[Cu(opba)]}(ClO4)2, where opba denotes o-phenylenebis(oxamato) and L stands for 1,10-phenanthroline(phen) (1), 5-nitro-1,10-phenanthroline(NO2-phen) (2), 2,2'-bipyridyl(bpy) (3) and 4,4'-dimethyl-2,2'-bipyridyl(Me2bpy) (4). The temperature dependence of the magnetic susceptibility of {[Ni(phen)2]2[Cu(opba)]}(ClO4)2.3H2O has been studied in the 4-300 K range, giving the exchange integral J=-109 cm-1. The MT vs. T plot exhibits a minimum at about 100 K, characteristic of this kind of coupled polymetallic complex with an irregular spin-state structure.     

Rhenium(IV)-copper(II) heterobimetallic complexes with a bridge malonato ligand. Synthesis, crystal structure, and magnetic properties

The Re(IV) complex [ReCl4(mal)]2-, in the form of two slightly different salts, (AsPh4)1.5(HNEt3)0.5[ReCl4(mal)] (1a) and (AsPh4)(HNEt3)[ReCl4(mal)] (1b), and the Re(IV)-Cu(II) bimetallic complexes [ReCl4(mu-mal)Cu(phen)2].CH3CN (2), [ReCl4(mu-mal)Cu(bpy)2] (3), and [ReCl4(mu-mal)Cu(terpy)] (4) (mal=malonate dianion, AsPh4=tetraphenylarsonium cation, HNEt3=triethylammonium cation, phen=1,10-phenanthroline, bpy=2,2'-bipyridine and terpy=2,2':6',2' '-terpyridine) have been synthesized and the structures of 1a, 1b, 2, and 3 determined by single-crystal X-ray diffraction. The structures of 1a and 1b are made up of discrete [ReCl4(mal)]2- anions and AsPh4+ and HNEt3+ cations, held together by electrostatic forces and hydrogen bonds. The Re(IV) atom is surrounded by four chloride anions and a bidentate malonate group, in a distorted octahedral environment. The structure of 2 consist of neutral dinuclear units [ReCl4(mu-mal)Cu(phen)2], with the metal ions united through a bridge carboxilato. The environment of Re(IV) is nearly identical to that in the mononuclear complex, and Cu(II) is five coordinate, being surrounded by four nitrogen atoms of two bidentate phen ligands and one oxygen atom of the malonato ligand. In 3, there are also dinuclear units, [ReCl4(mu-mal)Cu(bpy)2], but the Cu(II) ions complete a distorted octahedral coordination by binding with the free malonato oxygen atom of a neighbor unit, resulting in an infinite chain. The magnetic properties of 1-4 were also investigated in the temperature range 2.0-300 K. The magnetic behavior of 1a and 1b is as expected for a Re(IV) complex with a large value of the zero-field splitting (2D ca. 110 cm(-1)). For the bimetallic complexes, the magnetic coupling between Re(IV) and Cu(II) is antiferromagnetic in 2 (J=-0.39 cm(-1)), ferromagnetic in 4 (J=+1.51 cm(-1)), and nearly negligible in 3 (J=-0.09 cm(-1)).