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1.
《Journal of Coordination Chemistry》2012,65(18):1675-1679
The complex bis{(µ-chloro)-chloro-[N-benzoyl-N′-(2-hydroxyethyl)thiourea] mercury(II)} was prepared by reaction of HgCl2 with N-benzoyl-N′-(2-hydroxyethyl) thiourea(HL). The compound was characterized by IR and 1H?NMR spectroscopy and its structure was determined by single crystal X-ray diffraction. The complex is binuclear with two Hg(II) ions tetrahedrally coordinated by a terminal chloride, two bridging chlorides and a HL molecule. The Hg(II) ion is coordinated with HL via S(1). 相似文献
2.
《Polyhedron》2001,20(9-10):1097-1100
The X-ray crystal structure, variable-temperature magnetic susceptibilities and e.s.r. spectra are reported for the title complex. The complex crystallises as infinite chains in which the copper(II)-β-diketonate units are bridged axially by ambidentate pyrazine ligands with a Cu⋯Cu separation of 7.6700(2) Å. The magnetic susceptibility measurements in the range 5–325 K are consistent with the ferromagnetic intrachain exchange. The S=1/2 Heisenberg ferromagnetic linear chain analysis results in magnetic parameters of g=2.12 and J/k=0.6 K. 相似文献
3.
《Polyhedron》1999,18(6):857-862
The preparation, magnetic and spectroscopic properties, crystal and molecular structures of binuclear complexes of formulae [Cu2(dpyam)2(OH)2(ONO2)2] (I), [Cu2(dpyam)2(O2CH)4(OH2)].H2O (II) are described. (I) consists of pairs of copper atoms linked by two hydroxo bridges. The co-ordination geometry at each copper atom is distorted square-pyramidal, the basal plane consisting of two hydroxo oxygen atoms and two nitrogen atoms from a dpyam ligand, while the axial co-ordination sites are occupied by nitrate oxygen atoms. The copper(II) ions in (II) are also in a distorted square-pyramidal environment. They are bridged by a formate group in an anti–syn configuration from a basal position to an axial position, while another axial position is occupied by the water oxygen atom. From magnetic susceptibility measurements at room temperature, both complexes are found to exhibit antiferromagnetic interactions and some magneto-structural trends are discussed. 相似文献
4.
Lobana Tarlok S. Mahajan Ranjana Castineiras Alfonso 《Transition Metal Chemistry》2001,26(4-5):440-444
Complexes of CuI with tertiary phosphine chalcogenides are described. CuI reacts with Ph3PS in MeCN/CH2Cl2 to form {CuI(Ph3PS)(MeCN)} and CuCl reacts with 1,2-ethylene-bis(tertiary phosphine selenide) {dpeSe2} in MeCN to yield {CuCl(dpeSe2)}. Both compounds exist as halogen-bridged centrosymmetric dimers: [Cu2(-I)2-(Ph3PS)2(MeCN)2] (1) and [Cu2(-Cl)2(dpeSe2)2] (2) respectively. Compound (1) has almost symmetric Cu—I bonds, d(Cu—I) = 2.6503(8) Å and d(Cu—I) = 2.7196(9) Å, and each Cu is further bonded to a S atom [d(Cu—S) = 2.3444(13) Å] from Ph3PS and to a N atom [d(Cu—N) = 2.030(5) Å] from MeCN. Compound (2) has unequal Cu—Cl bonds, 2.6390(19) and 2.2806(18) Å and nearly equal Cu—Se bonds [2.4042(11) and 2.4060(11) Å]. The geometry about each Cu center in both cases is distorted tetrahedral. The Cu—Cu bond distance in (2) is 3.249(2) Å as compared with 3.4141(16) Å in (1). MeCN is bonded strongly to CuI as the excess of Ph3PS failed to remove it from the coordination sphere. Compound (2) represents the first structurally characterised example of copper(I) with a bis(tertiary phosphine selenide) (dpeSe2) acting as a bridging ligand. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(10):1089-1099
Aquabis(N,N-dimethylglycinato)copper(II) dihydrate, [Cu(dmg)2(H2O)]·2H2O, has been synthesized and characterized by elemental analysis, FT-IR, magnetic data, thermal analysis, solution UV-visible spectroscopy, X-ray crystal structure analysis and electrospray ionization mass spectroscopy. The square pyramidal copper(II) complex crystallizes in the orthorhombic space group P212121. The complex cleaves circular plasmid DNA (pBR322) in the presence of H2O2. The extent of cleavage varies with the concentration range of the complex, the type of buffer used, pH of buffer and the concentration of H2O2. Hydroxyl radical scavenger can inhibit the nucleolytic ability of this complex. 相似文献
6.
7.
The crystal and molecular structure of bis(α,α′-dithio-bis(formamidinium)) bis(μ2-chloro)hexachlorodimercurate(II) C4H16Hg2Cl8N8S4 (I), where α,α′-dithio-bis(formamidine) is C2H6N4S2, was solved. Crystals are monoclinic, a = 8.6417(6) Å, b = 14.648(1) Å, c = 10.2111(8) Å, β = 104.949(1)°, V = 1248.8(2) Å3, space group P21/n, Z = 4. The crystal structure is built of HgCl 4 2? ions linked via inversion centers into [Hg2Cl8]4? pairs and C2H8N4S 2 2+ cations. [Hg2Cl8]4? anions and C2H8N4S 2 2+ cations form alternating layers linked by N-H…Cl hydrogen bonds into a framework structure. 相似文献
8.
Dai-Zheng Liao Qian-Hua Zhao Zhi-Young Zhang Gen-Lin Wang 《Transition Metal Chemistry》1991,16(2):209-211
Summary The binuclear metal complexes [Cu(sampn)Co(L)2] (L=bipy, phen), have been prepared by the reaction of sodiumN,N-1,2-propanedisalicylamidatocuprate(II) heptahydrate, Na2[Cu(sampn)] 7H2O, with a divalent metalion, and 2,2-bipyridine or 1, 10-phenathroline. The complexes were characterized by variable-temperature magnetic susceptibility measurements; the results indicate that a weak antiferromagnetic spin-exchange interaction operates between the metal ions. 相似文献
9.
10.
《Journal of Coordination Chemistry》2012,65(4):519-530
We synthesized three copper(II) complexes with two structurally related polydentate ligands, quinoline-4-carboxylic acid (quCOOH) and quinoxaline (qux). The structures of these complexes were determined using X-ray single crystal crystallography. Complex 1, [Cu(quCOO)(N3)(H2O)] n , has a 2-D polymeric structure through di-μ1,1 azido groups forming (Cu2N2) dimeric units and di-μN,O quinoline carboxylate bridging the binuclear copper units. [Cu(quCOO)(N3)(H2O)] n · 0.87MeOH, (2), has the same structure as 1 in addition to MeOH molecules separating the 2-D sheets of [Cu(quCOO)(N3)(H2O)] n . [Cu(qux)(NO3)2] n , (3), has no coordinated azido groups, but the quinoxaline is a bidentate bridging ligand giving a 1-D chain, while the μO,O′ chelating nitrato groups stabilize the chain structure by forming a square planar coordination sphere around copper. IR and UV–Vis spectra of the complexes are in agreement with the crystal structures. 相似文献
11.
Q.-S. Ye M.-J. Xie X.-N. Li W.-P. Liu J. Yu Q.-W. Chang J. Jiang C.-X. Yan J. Li 《Journal of Structural Chemistry》2016,57(4):845-848
Di-μ-amido-bis[diammineplatinum(II)] nitrate (1) was synthesized as a byproduct during preparation of tetraammineplatinum(II) nitrate. One possible pathway to produce 1 is that [(H3N)2Pt(μ- OH)2Pt(NH3)2](NO3)2, a well-known complex forming on treatment of cis-Pt(NH3)2I2 with AgNO3, reacts with aqueous ammonia. The other possible pathway involves deprotonation of [Pt(NH3)4](NO3)2 to form monomeric Pt(NH3)3(NH2)NO3 followed by elimination of NH3. Crystals of 1 (from water) are monoclinic (C2/c) with a = 16.834(2) Å, b = 10.573(1) Å, c = 7.415(1) Å, β = 114.846(1)°, and Z = 4. The cationic portion consists of two symmetrical square-planar Pt centers with the inversion center at the midpoint of the Pt(1)???Pt(1A) vector. The Pt(II) ion is coordinated by four N atoms from two ammonia molecules and two bridging amido groups affording a slightly distorted square. The molecules are stacked in such a way that the planes of coordination squares turn out to be parallel to each other with a distance of 3.501 Å. Intermolecular Pt–H interaction between the μ-NH2 hydrogens and the platinum(II) centers of the adjacent molecule are observed. 相似文献
12.
Jun Lin Jun-Yong Zhang Yan Xu Xiao-Kang Ke Zijian Guo 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(2):192-194
The crystal structures of N,N′-(1,2-phenylene)bis(pyridine-2-carboxamide), C18H14N4O2, (I), and N,N′-(1,2-cyclohexanediyl)bis(pyridine-2-carboxamide) have been determined, the latter compound as the toluene hemisolvate, C18H20N4O2·0.5C7H8, (II). In (I), the benzene ring is nearly coplanar with one of the pyridine rings and forms a dihedral angle of 59.4 (1)° with the other. However, in (II), the dihedral angle of the two pyridine rings is 70.0 (1)°. 相似文献
13.
《Journal of Coordination Chemistry》2012,65(7):1176-1185
Mercury(II) complexes of pyrrolidinedithiocarbamate (PDTC) having the general formula [Hg(PDTC)X] (X = Cl?, SCN?, and CN?) and [Hg(PDTC)2] have been prepared and characterized by elemental analysis, IR, and NMR. The crystal structure of [Hg(PDTC)2] has also been determined by X-ray crystallography, showing that the complex is a centrosymmetric dimer, [Hg2(PDTC)4] (bis[µ2-(pyrrolidinedithiocarbamato-S,S′)(pyrrolidinedithiocarbamato-S,S′)mercury(II)]) (1). The solid-state structure of 1 contains two crystallographically equivalent Hg(II) centers in a distorted tetrahedron. 相似文献
14.
Mahdi Mirzaee Tayebeh Tamizkar Gholamhossein Mohammadnezhad Hamid Reza Khavasi Mostafa M. Amini 《Comptes Rendus Chimie》2011,14(10):927-933
Stochiometric reaction of salicylaldoxime and tantalum or niobium ethoxide in toluene at room temperature resulted in formation of [M2O(C7H5NO2)2(C2H5O)4], M=Ta and Nb which were crystallized from CH2Cl2 at −5 °C and characterized by spectroscopic techniques. The molecular structures of [Ta2O(C7H5NO2)2(C2H5O)4] was determined by single-crystal X-ray diffraction and compared with molecular structure of [Nb2O(C7H5NO2)2(C2H5O)4]. The geometries at metal atoms are distorted octahedron which shared an apex through bridged oxygen. Each dianionic salicylaldoximate ligand chelates to the one metal ion through its phenolic oxygen and oximate nitrogen atoms, and to another metal ion through its oximate oxygen atom. 相似文献
15.
《Polyhedron》1999,18(6):863-869
Electrochemical oxidation of metal anodes (cobalt, copper and nickel) in acetonitrile solutions of 2-(2-hydroxyphenyliminomethyl)-1-(4-methyl-phenylsulfonamido)benzene (H2L) gave [CoL], [CuL] and [NiL] complexes. When 1,10-phenanthroline (phen) or 2,2′-bipyridine (bipy) was added to the electrolytic cell, the mixed complexes [MLL′] (M=Co, Cu, L′=bipy or M=Ni, L′=phen) were obtained. A binuclear compound of composition [Ni2L2(MeOH)4] (1) was synthesized by reaction of the ligand H2L and nickel(II) acetate in methanol. X-ray structure determination showed the compound to be binuclear, with each nickel atom coordinated to two nitrogen and two bridging phenol oxygen atoms of two dianionic ligands and two methanol molecules, in an octahedral environment. The crystal structure of [CuLbipy] (2) was determined by X-ray diffraction; with the copper atom in a distorted bipyramidal environment defined by the two bipyridine nitrogen atoms and by the phenolic oxygen and the nitrogen atoms of the dianionic ligand. The electronic and vibrational spectral data of the complexes are discussed and related to the structure. 相似文献
16.
《Journal of Molecular Catalysis #》1982,14(1):75-86
Di-μ-hydroxo-bridged di-copper(II) complexes in aprotic media exhibit chemical properties in the oxidation reaction by molecular oxygen. Three oxidation reactions can occur without a base: oxidation of aldehydes into the corresponding acids, oxidative degradation of some carbonyl compounds into their lower homologues, and oxidative dimerisation of phenol. With a base a fourth reaction is observed: the dehydrogenation of alcohols into carbonyl compounds. Ligands, solvent and substrate structure effects are discussed. 相似文献
17.
Dai-Zheng Liao Li-Cun Li Zong-Hui Jiang Shi-Ping Yan Peng Cheng Geng-Lin Wang Xin-Kan Yao Hong-gen Wang 《Transition Metal Chemistry》1992,17(4):356-359
Three novel heterobinuclear complexes have been prepared and identified as [Cu(oxap)Ni(L)2](ClO4)2·ξH2O, where oxap denotes theN,N′-bis(2-aminopropyl)oxamido dianion and L denotes 2,2′-bipyridine (bipy), 1,10-phenanthroline (phen) or 5-nitro-1,10-phenanthroline
(NO2-phen). The crystal structure of [Cu(oxap)Ni(phen)2]-(ClO4)2·2H2O has been determined. Crystal data: triclinic, space group
, a=12.079 (6), b=12.409 (4), c=17.261 (8) ?, α=70.91 (2), β=86.72 (4), γ=89.19 (3)o. At room temperature, Z=2. The CuII is in a square planar environment and the NiII is in an octahedral environment. The Cu−Ni distance is 5.292 ?. The temperature dependences of the magnetic susceptibilities
of [Cu(oxap)Ni(phen)2]-(ClO4)2·2H2O and [Cu(oxap)Ni(bipy)2](ClO4)2 have been studied in the 4.2–300 K range, giving the exchange integral J=−92.4 cm−1 for bipy and J=−94.3 cm−1 for phen. These results are commensurate with antiferromagnetic interactions between the adjacent metal ions. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(4):465-472
A new μ-oxamido-bridged dicopper(II) complex, [Cu2(heap)](ClO4)2?·?2H2O [H2heap?=?N,N′-bis(N- hydroxyethylaminopropyl)oxamido], has been synthesized and structurally characterized by elemental analyses, molar conductance, IR and single-crystal X-ray diffraction. The single crystal X-ray analysis reveals that the asymmetric unit of the complex is composed of half a binuclear cation [Cu2(heap)]2+, one perchlorate anion, and one lattice water molecule. Each copper(II) atom is tetracoordinate in a distorted square-planar geometry and the bridging ligand (H2heap) adopts the trans conformation with an inversion centre at the middle of the C2–C2i bond. The structure cohesion is ensured by hydrogen bonding interactions, which form a two-dimensional supramolecular framework. The antibacterial assay indicates that the complex showed better activity than the ligand. 相似文献
19.
Kapoor Pratibha Kumar Ajay Nistandra Jyotsna Venugopalan Paloth 《Transition Metal Chemistry》2000,25(4):465-469
The title compound N,N,N′,N′-tetraethylpyridine-2,6-dicarboxamide (DEAP) forms a 1:1 complex with anhydrous CuCl2, [Cu(DEAP)Cl2], (1) which was crystallized from EtOH solution in the monoclinic space group P21/ n with cell constant, a = 10.024(1); b = 13.122(1); c = 14.404(1) Å β = 101.31(1)° V = 1857.8(3) Å3 and Z = 4. The chloro-perchlorato complex, [Cu(DEAP)Cl(ClO4)], (2) obtained in near quantitative yield by reacting (1) with an excess of NaClO4 in EtOH, crystallized in the monoclinic space group P21/ n with cell constants, a = 7.965(1); b = 25.827(2); c = 10.046(1) Å β = 98.81(1)° V = 2042.2(4) Å3 and Z = 4. Both (1) and (2) contain 5-coordinated copper linked to DEAP through O~N~O donor set of atoms with covalently bonded chlorine atoms in (1) and chlorine and perchlorate groups in (2). The coordination geometry is intermediate between square pyramidal and trigonal bipyramidal, and is probably best described as a trigonally distorted rectangular pyramid. 相似文献
20.
A. N. Chekhlov 《Russian Journal of Coordination Chemistry》2007,33(10):767-771
A new complex bis[(18-crown-6)potassium] bis(μ2-bromo)tetrabromodicopper(II), [{K(18-crown-6)}2Cu2Br6] (I), is synthesized and studied by X-ray diffraction analysis (space group P21/n, a = 9.137 Å, b = 34.860 Å, c = 13.414 Å, β = 99.53°, Z = 4). The structure is solved by a direct method and refined by the fullmatrix least-squares method in the anisotropic approximation to R = 0.083 for 5850 independent reflections (CAD-4 automated diffractometer, λMoK α radiation). Complex molecule I consists of the central binuclear anion [Cu2Br6]2? and two peripheral cations K(18-crown-6)]+ of the host-guest type bound to the [Cu2Br6]2? anion through two and one K-Br coordination bonds. In the [Cu2Br6]2? anion, the coordination polyhedra of two Cu atoms can be described as strongly flattened tetrahedra. In two [K(18-crown-6)]+ fragments, the coordination polyhedra of their K+ cations (coordination numbers 8 and 7) are distorted hexagonal pyramids with a base of six O atoms of the 18-crown-6 ligand and a bifurcated or ordinary vertex: the Br atoms of the [Cu2Br6]2? anion. Two 18-crown-6 ligands have a standard crown conformation. 相似文献