乙二醇二甲醚三苯基氧化膦三氯合铬Cr[(CH3OCH2CH2OCH3)(OPPh3)Cl3]的合成和晶体结构

标题配合物由Cr(CO)₆和PPh₃在50ml乙二醇二甲醚中回流5小时后过滤,在滤液中加S₂Cl₂,静置后得配合物单晶。晶体属单斜晶系,空间群为P2₁,单胞参数a=9.062(3)Å,b=11.088(3)Å,c=12.153(3)Å,β=97.93(1)°,V=1209.4(1.8)ų,Z=2。 晶体结构是采用Patterson法和差Fourier合成解出。经全矩阵最小2乘法修正,最后偏离因子R=0.046,R_ω=0.054,结构中Cr各与三个氧和三个氯原子键联,Cr-O(CH₃OCH₂CH₂OCH₃)平均距离为2.091Å,Cr-O(OPPh₃)距离为2.000Å,Cr-Cl(平均)距离为2.274Å。它们形成了八面体配位构型。     

铁（Ⅲ）、钴（Ⅱ）和镍（Ⅱ）的三（2－苯并咪唑甲基）胺配合物催化环己烯的氧化反应

铁（Ⅲ）、钴（Ⅱ）和镍（Ⅱ）的三（２－苯并咪唑甲基）胺配合物催化环己烯的氧化反应吕正荣，殷元骐，金道森（中国科学院兰州化学物理研究所，兰州７３００００）关键词铁（Ⅲ）配合物，钴（Ⅱ）配合物，镍（Ⅱ）配合物，环己烯氧化反应．与含血红素的氧化酶相比，人们...     

三元配合物Zn(L-tyr)(Aa)分子内配体间疏水作用

应用pH电位滴定法研究了三元配合物Zn(L-tyr)(As)[L-tyr(酪氨酸根)，Aa=L-val(缬氨酸根)。L-php(苯丙氨酸根)]，L-trp(色氨酸根)]在水和x=0．20、0．40及0.60二氧六环-水混合溶剂中的稳定性[t=25℃。I=0．1mol／L NaClO4]。三元配合物相对稳定性用δK=ΔlogK[=logβZw^Zn(L-try)(Aa)-log KZn^Zn(L-try)-logKZn^Zn(Aa)]-ΔlogK(a)[=1/2ΔlogK(L-trp) ΔlogK(Aa) log2]表示。结果表明：与L-丙氨酸(L-ala)配合物Zn(L-tyr)(L-ala)相比，所有这些配合物均具有相对较高的δK值，表明配合物分子内存在着额外的稳定化作用。这种稳定性化作用可能主要归因于三元配合物分子内氨基酸侧链之间的疏水作用。并且这种作用随着氨基酸侧链结构及溶剂极性变化而变化。     

链型含醇羟基N3O2配体Zn(Ⅱ)和Cu(Ⅱ)配合物催化对-硝基苯酚乙酸酯水解研究

合成了链型五齿配体Ｎ－（２－羟乙基）－Ｎ”－（２－羟基苄基）－二乙烯三胺（ＨＬ）,通过元素分析、ＩＲ和１Ｈ ＮＭＲ 等手段进行了表征。用 ｐＨ电位滴定法,在 ２５ ± ０． １℃, Ｉ＝ ０． １０（ＫＮＯ３）条件下,测定了配体的质子化常数以及 配体与Ｃｕ（Ⅱ）和Ｚｎ（Ⅱ）配位反应平衡常数。讨论了配体与金属离子的配位情况,得到了配位酚羟基和水的离解 常数。运用分光光度法,在 ｐＨ＝ ７． ０－ ９． ０范围内,研究了配合物催化对硝基苯酚乙酸酯（ＮＡ）水解动力学,得到 了 ＮＡ酯水解的配合物催化速率常数 ｋｃ。结果表明,Ｃｕ（Ⅱ）与配体的氨基和酚羟基配位,生成四配位配合物,配 位酚羟基的 ｐ Ｋａ值为 ４． ７９,对 ＮＡ酯水解基本上没有催化效果;而 Ｚｎ（Ⅱ）则可以分别与配体的三个氨基,一个 酚羟基和一个溶剂水分子配位,形成五配位配合物,配位酚羟基和水的 ｐ Ｋａ分别为 ５． ９９和 ９. １７,催化 ＮＡ酯 水解时,存在 Ｚｎ（Ⅱ）…－ＯＨ和酸羟基的协同作用,有很好的催化效果,ｐＨ为 ９． ０时, ｋｃ可达 ８． ５０ × １０－２ ｍｏｌ－１· Ｌ· ｓ－ １。     

二(三苯基膦)水杨酸铜(Ⅰ)乙醇溶剂配合物的晶体结构

0IntroductionThestudyofcopper?complexesisinvestigatedinmanylaboratories.Amongthereasonsforcarryingouttheinvestigationofsuchspeciesaretheirstructuralfeatures犤1犦,theusefulnessofcopper?compoundsinorganicsyntheses犤2犦andthewell-documentedimpor-tanceofcopper?centersattheactivesitesofanumberofprotein犤3犦.Concerningcopper?carboxy-latesafurtherinterestexists,stemmingfromtheiruseinhomogeheouscatalysedhydrogenation犤4犦.Thecopper?bis(triphenylphosphine)cationisasoft,butflexi-bleacceptorionthatcanacc…     

3-氨基-1,4,5,6-四氢吡咯[3,4-c]吡唑构筑的钴(Ⅱ)、铜(Ⅱ)配合物的晶体结构

以3-氨基-1,4,5,6-四氢吡咯[3,4-c]吡唑（Athpp）为配体合成了2个金属配合物即CoCl₄（Athpp）₂·2H₂O（1）和CuCl₄（Athpp）₂（2）。用红外、元素分析和X-射线单晶衍射等手段表征了晶体结构。配合物1结晶在P1空间群而配合物2结晶在P2₁/n空间群。金属中心均采取扭曲八面体构型。此外,还研究了配合物的固体荧光性质     

异硫氰酸铬（Ⅲ）二（18－冠－6）铵配合物的合成、特征和光化学

本文报道了标题中所指的配合物固体和单晶的制备，测定了ＩＲ，ＵＶ－Ｖｉｓ光谱以及该配合物在ＣＨ３ＣＮ和ＤＭＦ中的光化学性质．采用单晶Ｘ射线衍射测定了该配合物的结构，它属于单斜晶系，空间群Ｐ２１／ｎ，测定了固体配合物在ＣＨ３ＣＮ和ＤＭＦ中的量子产率Φ（ＮＣＳ），并讨论了光反应机制．     

Synthesis, Crystal Structure and Characterization of α-（1-Benzimidazolyl） -hypnone Cobalt（Ⅱ） Complex： [CoCl （ C7H5N2CH2COPh）4] Br

The crystal structure of [CoCl ( C7H5N2CH2COPh)4] Br has been determined by means of X-ray crystallography. The molecular structure consists of a discrete [CoCl ( C7H5N2CH2COPh)4] ^ cation and one Br^- anion, in the [CoCl ( C7H5N2CH2COPh)4]^ cation, the coordination geometry of the central Co atom is square-pyramidal with four tertiary N atoms of benzimidazole from four α-( benzimidazol-1-yl) -hypnone ligands in the basal position and one chloride anion in the apical position. In the solid state, [CoCl ( C7H5N2CH2COPh)4]^ and Br^- anion possess intermolecular and intramolecular interactions, which stabilize the crystal structure. The characterization of the title compound were also carried out by using elemeutal analysis, FTIR, UV spectrometries and TG-DSC.     

基于[（Tp）Fe（CN）3]^-氰根桥联异金属三核配合物的合成、晶体结构及磁性（英文）

采用[（Tp）Fe（CN）3]^-（Tp=hydrotris（pyrazolyl）borate）与[NiL]（ClO4）2（L=3,10-bis（2-hydroxyethyl）-1,3,5,8,10,12-hexaazacyclotetra-decane）反应,合成了氰根桥联的异金属三核配合物[NiL][（Tp）Fe（CN）3]2·4H2O （1）,并对其结构和磁性进行了研究。该化合物晶体属于正交晶系,Pbca 空间群。配合物1中,Ni髤大环与2个[（Tp）Fe（CN）3]-通过氰根桥联,形成近似直线的三核结构。Ni原子的配位采取六配位稍畸变的八面体构型,其中大环配体上的4个N原子占据赤道平面而桥联氰根的2个N原子占据轴向位置。磁性测定表明在2-300 K的温度范围内,Ni髤和Fe髥之间通过桥联的氰根产生弱的铁磁相互作用。用哈密顿函数H=-2J（SFe1·SNi＋SFe2·SNi）对其χMT-T曲线进行了拟合,得到1的朗德因子g=2.35和交换常数J=8.13 cm^-1。最后,对配合物的结构与磁性的关系进行了讨论。     

Synthesis,Crystal Structures and Properties of Tetrametallic Complexes: [M2(phen)4(FCA)2](ClO4)2·(H2O)2 (M=Zn or Co,phen=1,10‐phenanthroline,FCA=anion of 3‐ferrocenyl‐2‐crotonic acid)

Two new complexes [Zn₂(phen)₄(FCA)₂](ClO₄)₂·(H₂O)₂ ( 1 ) and [Co₂(phen)₄ (FCA)₂](ClO₄)₂·(H₂O)₂ (2) (FCA=anion of 3‐ferrocenyl‐2‐crotonic acid, phen=1,10‐phenanthroline) have been synthesized, and characterized by elemental analysis, IR, UV‐Vis spectra, thermal analyses, and single‐crystal X‐ray diffraction. Two M(II) (M=Zn or Co) ions are bridged by two FCA anions with syn‐anti bridging ligands, leading to dimeric cores, [M₂(phen)₄(FCA)₂]²⁺, and each M(II) ion is six‐coordinated in a distorted octahedral geometry by two chelate phen ligands and two μ₂‐carboxylate oxygen atoms from two FCA groups. The M(II)…M(II) intradimer distances are 0.4391 and 0.4462 nm in 1 and 2 , respectively. Electrochemical properties of the complexes have been discussed.     

5‐n‐Butylpyridine‐2‐carboxylate–copper(II) and –iron(III) complexes

In trans‐bis(5‐n‐butyl­pyridine‐2‐carboxyl­ato‐κ²N,O)­bis­(methanol‐κO)copper(II), [Cu(C₁₀H₁₂NO₂)₂(CH₄O)₂], the Cu atom lies on a centre of symmetry and has a distorted octahedral coordination. The Cu—O(methanol) bond length in the axial direction is 2.596 (3) Å, which is much longer than the Cu—­O(carboxylate) and Cu—N distances in the equatorial plane [1.952 (2) and 1.977 (2) Å, respectively]. In mer‐tris(5‐n‐bu­tyl­pyridine‐2‐carboxyl­ato‐κ²N,O)­iron(III), [Fe(C₁₀H₁₂NO₂)₃], the Fe atom also has a distorted octahedral geometry, with Fe—O and Fe—N bond‐length ranges of 1.949 (4)–1.970 (4) and 2.116 (5)–2.161 (5) Å, respectively. Both crystals are stabilized by stacking interactions of the 5‐n‐butyl­pyridine‐2‐carboxyl­ate ligand, although hydrogen bonds also contribute to the stabilization of the copper(II) complex.     

Two‐dimensional square‐grid frameworks formed by self‐associating copper(II) complexes with 1‐(3‐pyridyl)‐ and 1‐(4‐pyridyl)‐substituted butane‐1,3‐diones

In bis­[1‐(3‐pyridyl)butane‐1,3‐dionato]copper(II) (the Cu atom occupies a centre of inversion), [Cu(C₉H₈NO₂)₂], (I), and bis­[1‐(4‐pyridyl)butane‐1,3‐dionato]copper(II) methanol solvate, [Cu(C₉H₈NO₂)₂]·CH₃OH, (II), the O,O′‐chelating diketonate ligands support square‐planar coordination of the metal ions [Cu—O = 1.948 (1)–1.965 (1) Å]. Weaker Cu⋯N inter­actions [2.405 (2)–2.499 (2) Å], at both axial sides, occur between symmetry‐related bis­(1‐pyridylbutane‐1,3‐dion­ato)copper(II) mol­ecules. This causes their self‐organization into two‐dimensional square‐grid frameworks, with uniform [6.48 Å for (I)] or alternating [4.72 and 6.66 Å for (II)] inter­layer separations. Guest methanol mol­ecules in (II) reside between the distal layers and form weak hydrogen bonds to coordinated O atoms [O⋯O = 3.018 (4) Å].     

Crystal Structures,Magnetic Properties and Catecholase‐Like Activities of μ‐Alkoxo‐μ‐Carboxylato Double Bridged Dinuclear and Tetranuclear Copper(II) Complexes

One μ‐alkoxo‐μ‐carboxylato bridged dinuclear copper(II) complex, [Cu₂(L¹)(μ‐C₆H₅CO₂)] ( 1 )(H₃L¹ = 1,3‐bis(salicylideneamino)‐2‐propanol)), and two μ‐alkoxo‐μ‐dicarboxylato doubly‐bridged tetranuclear copper(II) complexes, [Cu₄(L¹)₂(μ‐C₈H₁₀O₄)(DMF)₂]·H₂O ( 2 ) and [Cu₄(L²)₂(μ‐C₅H₆O₄]·2H₂O·2CH₃CN ( 3 ) (H₃L² = 1,3‐bis(5‐bromo‐salicylideneamino)‐2‐propanol)) have been prepared and characterized. The single crystal X‐ray analysis shows that the structure of complex 1 is dimeric with two adjacent copper(II) atoms bridged by μ‐alkoxo‐μ‐carboxylato ligands where the Cu···Cu distances and Cu‐O(alkoxo)‐Cu angles are 3.5 11 Å and 132.8°, respectively. Complexes 2 and 3 consist of a μ‐alkoxo‐μ‐dicarboxylato doubly‐bridged tetranuclear Cu(II) complex with mean Cu‐Cu distances and Cu‐O‐Cu angles of 3.092 Å and 104.2° for 2 and 3.486 Å and 129.9° for 3 , respectively. Magnetic measurements reveal that 1 is strong antiferromagnetically coupled with 2J =‐210 cm^?1 while 2 and 3 exhibit ferromagnetic coupling with 2J = 126 cm^?1 and 82 cm^?1 (averaged), respectively. The 2J values of 1–3 are correlated to dihedral angles and the Cu‐O‐Cu angles. Dependence of the pH at 25 °C on the reaction rate of oxidation of 3,5‐di‐tert‐butylcatechol (3,5‐DTBC) to the corresponding quinone (3,5‐DTBQ) catalyzed by 1–3 was studied. Complexes 1–3 exhibit catecholase‐like active at above pH 8 and 25 °C for oxidation of 3,5‐di‐tert‐butylcatechol.     

1‐(2‐Hydroxyethyl)‐3‐nitro‐1, 2, 4‐triazole and its Complexes with Copper(II) Chloride and Copper(II) Perchlorate

1‐(2‐Hydroxyethyl)‐3‐nitro‐1, 2, 4‐triazole (hnt), prepared by alkylation of 3‐nitro‐1, 2, 4‐triazole with 2‐chloroethanol, was found to react with copper(II) chloride and copper(II) perchlorate in acetonitrile/ethanol solutions giving complexes [Cu₂(hnt)₂Cl₄(H₂O)₂] and[Cu(hnt)₂(H₂O)₃](ClO₄)₂, respectively. They are the first examples of coordination compounds with a neutral N‐substituted 3‐nitro‐1, 2, 4‐triazole ligand. 1‐(2‐Hydroxyethyl)‐3‐nitro‐1, 2, 4‐triazole and the obtained complexes were characterized by NMR and IR spectroscopy, X‐ray, and thermal analyses. [Cu₂(hnt)₂Cl₄(H₂O)₂] presents a dinuclear chlorido‐bridged complex in which hnt acts as a chelating bidentate ligand, coordinated to the metal by a nitrogen atom of the triazole ring and an oxygen atom of the nitro group, and the copper atoms are inconsiderably distorted octahedral coordination. [Cu(hnt)₂(H₂O)₃](ClO₄)₂comprises a mononuclear complex cation, in which two nitrogen atoms of two hnt ligands in trans configuration and three water oxygen atoms form a square pyramidal environment around the copper atom, which is completed to an distorted octahedron with a bifurcated vertex due to two additional elongated Cu–O bonds with two nitro groups. In both complexes, Cu–O bonds with the nitro groups may be considered as semi‐coordinated.     

(2‐Methyl­quinolin‐8‐olato)­iron(III) and ‐copper(II) complexes

The crystal structures of tris(2‐methyl­quinolin‐8‐olato‐N,O)­iron(III), [Fe­(C₁₀­H₈­NO)₃], (I), and aqua­bis(2‐methyl­quinolin‐8‐olato‐N,O)­copper(II), [Cu­(C₁₀­H₈NO)₂­(H₂O)], (II), have been determined. Compound (I) has a distorted octahedral configuration, in which the central Fe atom is coordinated by three N atoms and three O atoms from three 2‐methylquinolin‐8‐olate ligands. The three Fe—O bond distances are in the range 1.934 (2)–1.947 (2) Å, while the three Fe—N bond distances range from 2.204 (2) to 2.405 (2) Å. In compound (II), the central Cu^II atom and H₂O group lie on the crystallographic twofold axis and the coordination geometry of the Cu^II atom is close to trigonal bipyramidal, with the three O atoms in the basal plane and the two N atoms in apical positions. The Cu—N bond length is 2.018 (5) Å. The Cu—O bond length in the basal positions is 1.991 (4) Å, while the Cu—O bond length in the apical position is 2.273 (6) Å. There is an intermolecular OW—H?O hydrogen bond which links the mol­ecules into a linear chain along the b axis.     

Luminescent properties of three structures built from 3‐cyano‐4‐dicyanomethylene‐5‐oxo‐4,5‐dihydro‐1H‐pyrrol‐2‐olate and cadmium

Yellow–orange tetraaquabis(3‐cyano‐4‐dicyanomethylene‐5‐oxo‐4,5‐dihydro‐1H‐pyrrol‐2‐olato‐κN³)cadmium(II) dihydrate, [Cd(C₈HN₄O₂)₂(H₂O)₄]·2H₂O, (I), and yellow tetraaquabis(3‐cyano‐4‐dicyanomethylene‐5‐oxo‐4,5‐dihydro‐1H‐pyrrol‐2‐olato‐κN³)cadmium(II) 1,4‐dioxane solvate, [Cd(C₈HN₄O₂)₂(H₂O)₄]·C₄H₈O₂, (II), contain centrosymmetric mononuclear Cd²⁺ coordination complex molecules in different conformations. Dark‐red poly[[decaaquabis(μ₂‐3‐cyano‐4‐dicyanomethylene‐5‐oxo‐4,5‐dihydro‐1H‐pyrrol‐2‐olato‐κ²N:N′)bis(μ₂‐3‐cyano‐4‐dicyanomethylene‐1H‐pyrrole‐2,5‐diolato‐κ²N:N′)tricadmium] hemihydrate], [Cd₃(C₈HN₄O₂)₂(C₈N₄O₂)₂(H₂O)₁₀]·0.5H₂O, (III), has a polymeric two‐dimensional structure, the building block of which includes two cadmium cations (one of them located on an inversion centre), and both singly and doubly charged anions. The cathodoluminescence spectra of the crystals are different and cover the wavelength range from UV to red, with emission peaks at 377 and 620 nm for (III), and at 583 and 580 nm for (I) and (II), respectively.     

Synthetic and Structural Studies on Copper 1 H‐[1,10]‐Phenanthrolin‐2‐one Coordination Complexes: Isolation of a Novel Intermediate During 1,10‐Phenanthroline Hydroxylation

The synthesis and crystal structure elucidation of a novel dinuclear heteroleptic copper(II) complex has led to an alternative mechanism in the formation of covalent hydrates. During further studies on the synthesis and properties of [Cu₂(ophen)₂] ( 1 ), a dinuclear complex of copper(I) with 1 H‐[1,10]‐phenanthrolin‐2‐one (Hophen), two intermediates/alternative products 2 and 3 were isolated. The dinuclear, antiferromagnetic complex [Cu₂(ophen)₂(phen)₂] ? (NO₃)₂ ? 9H₂O ( 3 , phen=1,10‐phenanthroline) contains two five‐coordinate copper(II) ions, both with trigonal‐bipyramidal coordination, which are bridged together through deprotonated hydroxyl groups with a Cu? Cu non‐bonding distance of 3.100 Å. Complex [Cu(phen)₂(H₂O)] ? (NO₃)₂ ( 2 ) is a polymorph of a previously reported material. The occurrence of 2 and 3 has led us to propose a variation to the Gillard mechanism for the formation of covalent hydrates in bidentate N‐heterocycles in which the attacking nucleophile may be the deprotonated form of 2 , [Cu(phen)₂(OH)]^?, rather than free OH^?.     

Synthesis,Structure, and Magnetic Characterization of a Series of Iron(II) Coordination Frameworks with 2, 6‐Bis(1, 2,4‐triazole‐4‐yl)pyridine

Based on the bis‐triazole ligand 2, 6‐bis(1, 2,4‐triazole‐4‐yl)pyridine (L), the triazole‐iron(II) complexes [Fe(L)₂(dca)₂(H₂O)₂] · 2H₂O ( 1 ) (Nadca = sodium dicyanamide), {[Fe(μ₂‐L)₂(H₂O)₂]Cl₂}_n ( 2 ), and {[Fe(μ₂‐L)₂(H₂O)₂](ClO₄)₂ · L · H₂O}_n ( 3 ) were isolated by solvent diffusion methods. When iron(II) salts and Nadca were used, compound 1 was isolated, which contains mononuclear Fe(L)₂(dca)₂(H₂O)₂ units. When FeCl₂ or FeClO₄ were used, one‐dimensional (1D) cation iron(II) chains ( 2 ) and two‐dimensional (2D) cation iron(II) networks ( 3 ) were isolated indicating anion directing structural diversity. Moreover, variable‐temperature magnetic susceptibility data of 1 – 3 were recorded in the temperature range 2–300 K. The magnetic curve of complex 2 was fitted by using the classical spin Heisenberg chain model indicating anti‐ferromagnetic interactions (J = –5.31 cm^–1). Obviously complexes 1 – 3 show no detectable thermal spin crossover behaviors, the lack of spin‐crossover behavior may be correlated with FeN₄O₂ coordination spheres in 1 – 3 .     

Copper(II) bis(4,4,4‐trifluoro‐1‐phenylbutane‐1,3‐dionate) complexes with pyridin‐2‐one, 3‐hydroxypyridine and 3‐hydroxypyridin‐2‐one ligands: molecular structures and hydrogen‐bonded networks

Copper(II) bis(4,4,4‐trifluoro‐1‐phenylbutane‐1,3‐dionate) complexes with pyridin‐2‐one (pyon), 3‐hydroxypyridine (hpy) and 3‐hydroxypyridin‐2‐one (hpyon) were prepared and the solid‐state structures of (pyridin‐2‐one‐κO )bis(4,4,4‐trifluoro‐3‐oxo‐1‐phenylbutan‐1‐olato‐κ²O ,O ′)copper(II), [Cu(C₁₀H₆F₃O₂)₂(C₅H₅NO)] or [Cu(tfpb‐κ²O ,O ′)₂(pyon‐κO )], (I), bis(pyridin‐3‐ol‐κO )bis(4,4,4‐trifluoro‐3‐oxo‐1‐phenylbutan‐1‐olato‐κ²O ,O ′)copper(II), [Cu(C₁₀H₆F₃O₂)₂(C₅H₅NO)₂] or [Cu(tfpb‐κ²O ,O ′)₂(hpy‐κO )₂], (II), and bis(3‐hydroxypyridin‐2‐one‐κO )bis(4,4,4‐trifluoro‐3‐oxo‐1‐phenylbutan‐1‐olato‐κ²O ,O ′)copper(II), [Cu(C₁₀H₆F₃O₂)₂(C₅H₅NO₂)₂] or [Cu(tfpb‐κ²O ,O ′)₂(hpyon‐κO )₂], (III), were determined by single‐crystal X‐ray analysis. The coordination of the metal centre is square pyramidal and displays a rare example of a mutual cis arrangement of the β‐diketonate ligands in (I) and a trans‐octahedral arrangement in (II) and (III). Complex (II) presents the first crystallographic evidence of κO‐monodentate hpy ligation to the transition metal enabling the pyridine N atom to participate in a two‐dimensional hydrogen‐bonded network through O—H…N interactions, forming a graph‐set motif R ₂²(7) through a C—H…O interaction. Complex (III) presents the first crystallographic evidence of monodentate coordination of the neutral hpyon ligand to a metal centre and a two‐dimensional hydrogen‐bonded network is formed through N—H…O interactions facilitated by C—H…O interactions, forming the graph‐set motifs R ₂²(8) and R ₂²(7).