A novel three-dimensional cobalt(II)-radical complex Co(NITmPy)2[N(CN)2]2: Structure and magnetic properties

A novel three-dimensional cobalt(II)-radical complex {Co(NITmPy)₂[N(CN)₂]₂}_n (NITmPy = 2-(3′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) is prepared and characterized by X-ray crystallography. The complex crystallizes in the monoclinic system, space group P2₁/c, with unit cell parameters a = 12.5775(5) Å, b = 10.9340(5) Å, c = 11.6134(5) Å, β = 108.1320(10)°; V = 1517.79(11) ų, ρ_calcd = 1.443 g/cm³, and Z = 2 for R ₁ = 0.0463. In the complex, each cobalt ion is six-coordinate with four nitrogen atoms from four N(CN) ₂ ^t- ligands and two nitrogen atoms of pyridyl groups, and the [Co(NITmPy)₂]²⁺ units are linked by N(CN) ₂ ^t- μ-bridging ligands to form a three-dimensional structure. The variable-temperature magnetic susceptibility data show that the complex exhibits weak antiferromagnetic interactions.     

Synthesis, crystal structure, and magnetic properties of a cobalt(II) complex with (3,5-dichloropyridin-4-yl)(pyridin-4-yl)methanol

A novel bridging ligand, (3,5-dichloropyridin-4-yl)(pyridin-4-yl)methanol (I), and its cobalt(II) complex, [Co(I)₂(NCS)₂]_n (II), were prepared. The structures of ligand I and complex II were determined by single crystal X-ray analysis. Magnetic susceptibility measurements were performed for cobalt (II) complex II. Compound I crystallised in orthorhombic space group Pbca with a = 7.6585(14) Å, b = 12.209(2) Å, c = 23.207(4) Å, V= 2170.0(7) ų and Z=8. Complex II crystallised in monoclinic space group P2₁/n with a = 13.223(8) Å, b = 16.959(10) Å, c = 13.948(8) Å, β = 115.395(10)°, V= 2826(3) ų and Z = 4. Each cobalt(II) ion is surrounded by two NCS^? anions and four pyridyl moieties from two bridging ligands. Each bridging ligand connects two neighbouring Co(II) ions to form a 2-dimensional structure. Temperature dependence of the molar magnetic susceptibilities in the temperature range of 2–300 K revealed that magnetic interactions between the cobalt ions are weak.     

Synthesis, crystal structure, and magnetic properties of a new manganese(II) complex with nitronyl nitroxide

A new manganese(II) complex [MnCl₂(NIT-1′-MeBzIm)₂] · 3H₂O (NIT-1′-MeBzIm = 2-{2′-[(l′-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in monoclinic, space group C2/c, Z = 4. Crystal data: C₃₀H₃₈Cl₂MnN₈O₈, M = 764.52, a = 17.261(3) Å, b = 21.317(4) Å, c = 11.744(2) Å, β = 108.464(2)°. The X-ray analysis reveals that Mn(II) atom is six-coordinated with a distorted octahedral geometry. The complex was linked by intermolecular hydrogen bonds, leading to a 2D network configuration. Magnetic investigation indicates the existence of interamolecular interactions is ferromagnetic with J = 1.11 cm^?1.     

Malonatobenzhydrazidediaquacobalt(II) hydrate: Synthesis,crystal and molecular structures

The coordination compound [Co(L)(Mal)(H₂O)₂]H₂O (I) (L is benzhydrazide, H₂Mal is malonic acid) has been synthesized and studied by IR spectroscopy, thermogravimetry, and X-ray diffraction. Crystals are triclinic, a = 7.610(4) Å, b = 7.854(2) Å, c = 12.751(2) Å, α = 75.12(3)°, β = 88.01(3)°, γ = 80.26(3)°, Z = 2, space group \(P\bar 1\). The structure is molecular. The Co²⁺ atom has a distorted octahedral coordination. The Co-O and Co-N bond lengths are 2.031-2.129(4) and 2.157(5) Å, respectively. The endocyclic O1Co1N1 bond angles are 77.3(2)° and 90.0(2)° in the five- and six-membered chelate rings, respectively. Molecules of complex I are linked via a great number of hydrogen bonds. The C…C contacts between phenyl rings additionally strengthen the structure.     

Crystal Structure and Thermal Property of a Binuclear Manganese(II) Sulfate Complex with Carbohydrazide

The binuclear manganese(II) complex of formula [Mn₂(CHZ)₂(H₂O)₂(SO₄)₂] (CHZ = carbohydrazide) (1) has synthesized in aqueous solution and characterized by elemental analysis, IR, and single crystal X-ray diffraction. The compound 1 crystallizes in monoclinic system, space group P2(1)/n, a = 7.083(1) Å, b = 7.985(1) Å, c = 14.045(2) Å, β = 90.46(1)^°, V = 794.42(16) ų, Z = 2, R = 0.0308 with 1481 reflections. In the title complex, two Mn(II) cations are bonded via the bridging oxygen atoms into a centrosymmetric dimeric unit. The Mn(II) dimers are further extended into layers by means of the bridging sulfate groups. Each Mn atom in the complex is in bivalent state with a distorted pentagonal bipyramid configuration and has a N₂O₅ donor set which consists of two nitrogen atoms and five oxygen atoms provided by the ligands of two CHZ molecules, one water molecule, and two sulfate ions. The CHZ tridentate ligands are coordinated with adjacent Mn(II) cation via two terminal N atoms and the carbonyl O atom and sulfate anions act as bidentate bridge ligand. Four kinds of Mn(II) CHZ complex structures are compared. The thermal property of title complex was studied by using DSC and TG-DTG techniques. The results exhibit the title complex is highly stable.     

Synthesis, crystal structure, electrochemical and fluorescence studies of a novel Zn(II)-fluorophore, 1,10-phenanthroline-5,6-dione (phen-dione)

The crystal structure of 1,10-phenanthroline-5,6-dione ligand with Zn(II), tris(1,10-phenanthroline-5,6-dione)zinc(II) hexafluorophosphate, [Zn(phen-dione)₃](PF₆)₂, is reported. The complex was characterized by elemental analysis, IR, ¹H NMR, electronic absorption spectroscopies, cyclic voltammetry and X-ray crystallography. Yellow crystals of [Zn(phen-dione)₃](PF₆)₂ were formed by ether diffusion into an acetonitrile solution of the complex. The title complex crystallized in monoclinic crystal system (Z = 2) with space groups of P2 ₁, a = 12.0299(15) Å, b = 14.5306(19) Å, c = 13.1879(17) Å, β = 94.058(2)º and V = 2299.5(5) ų. The structure was refined by using 10048 independent reflections, with I > 2σ(I) to an R factor of 0.0490. Single-crystal structure showed that the coordination geometry around the Zn(II) was a distorted octahedron. The complex showed an intense fluorescence band at visible region (690 nm) in CH₃CN with an excitation wavelength of 310 nm at 25.0 ± 0.1 ºC. Cyclic voltammogram of the title complex showed two quasi-reversible reduction couples at negative potential, which were assigned to the consecutive reduction of phen-dione ligand to phen-semiquinonate and phen-diolate respectively by analogy to other phen-dione complexes at scan rate 200 mV s^-1.     

Synthesis and crystal and molecular structure of the [Co(HL)Cl<Subscript>2</Subscript>] complex (H<Subscript>2</Subscript>L is an optically active terpene bis-pinane propylenediaminodioxime)

Interaction of Co(II) chloride with optically active bis-pinane propylenediaminodioxime (H₂L) gave a diamagnetic compound of Co(III) with a composition [Co(HL)Cl₂]. The crystal and molecular structure of the compound was determined by X-ray diffraction (XRD) analysis (Enraf-Nonius CAD-4 diffractometer, λMoK_α, 703 F _hkl , R = 0.0347). The crystals are orthorhombic with unit cell parameters a = 8.989(1) Å, b = 12.351(2) Å, c = 22.425(3) Å, V = 2487.7(6) ų, Z = 4, ρ_calc = 1.420 g/cm³, space group P2₁2₁2₁. The crystal structure of the complex is composed of discrete one-center molecules. In the complex, the Co³⁺ ion coordinates four N atoms of the tetradentate cycle-forming ligand (HL^? anion) and two Cl atoms. The coordination polyhedron of Co is a distorted octahedron Cl₂N₄.     

Structure and characterization of A 2D cobalt(II) complex [Co(L)2] n (L = 3-nitro-5-(pyridine-4-yl)benzoate)

The self-assembly of unsymmetrical tecton 3-nitro-5-(pyridin-4-yl)benzoic acid (HL)with cobalt chloride under hydrothermal conditions affords a new 2D coordination polymer [Co(L)₂] _n (1, L = 3-nitro-5-(pyridin-4-yl)benzoate), which is characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, powder X-ray diffraction analysis, and single crystal X-ray diffraction. Compound 1 is of the triclinic system, space group P-1 with a = 9.7857(12) Å, b = 10.3417(13) Å, c = 10.8463(13) Å, α = 85.155(2)°, β = 74.785(2)°, γ = 88.962(2)°, V = 1055.4(2) ų. The crystal structural analysis of complex 1 shows that the cobalt center is six-coordinated in an octahedral geometry by four O atoms from four different L ligands and two N atoms from two different L ligands; the Co(II) cations are bridged by μ₃-L into an interesting two-dimensional network structure. It should be pointed out that the thermal analysis results indicate that complex 1 is quite stable up to 420°C.     

Synthesis,crystal structure,and electrochemistry of [Co{(Me-sal)2dien}(N3)] and [Co{(Me-sal)2dpt}(N3)]

The structure, spectroscopic, and electrochemical properties of [Co{(Me-sal)₂dien}(N₃)] and [Co{(Me-sal)₂dpt}(N₃)], where (Me-sal)₂dien = 2,2′-[1,1′-(3-azapentane-1,5-diyldinitrilo)diethylidyne] diphenolate and (Me-sal)₂dpt = 2,2′-[1,1′-(4-azapentane-1,7-diyldinitrilo)diethylidyne] diphenolate, have been investigated. These complexes have been characterized by elemental analyses, IR, UV–Vis, and ¹H-NMR spectroscopy. The crystal structures of these complexes have been determined by X-ray diffraction. Complex 1 crystallizes in the triclinic space group P 1, with a = 7.8443(4) Å, b = 11.0660(5) Å, c = 11.6216(6) Å, α = 73.360(1)°, β = 76.965(1)°, γ = 84.436(1)° and Z = 2. Complex 2 crystallizes in the monoclinic space group P2₁/n, with a = 12.1985(13) Å, b = 10.9332(12) Å, c = 15.2808(16) Å, β = 76.965(1)° and Z = 4. The coordination geometry around cobalt(III) in both complexes is a distorted octahedron. The electrochemical reduction of these complexes at a glassy carbon electrode in acetonitrile indicates that the first reduction corresponding to Co^III–Co^II is electrochemically irreversible, accompanied by dissociation of the axial Co–N(N₃) bond. The second reduction step of Co(II/I) leads to decomposition of the complex. These observations are rationalized based on the structure-function relations.     

Coordination compounds of cobalt(II) and cadmium(II) with 2-amino-4-methylpyrimidine: Synthesis, crystal structure, and luminescent properties

The coordination compounds [CoL₂Cl₂] (I) and [CdL₂(H₂O)₂(NO₃)₂] (II) have been synthesized by the reaction of CoCl₂ · 6H₂O and Cd(NO₃)₂ · 4H₂O with L = 2-amino-4-methylpyrimidine (Ampym, C₅H₇N₃), and their structures have been solved. The crystals of complex I are triclinic, space group $P\bar 1$ , a = 5.627(1) Å, b = 11.191(1) Å, c = 12.445(1) Å, α = 81.00(1)°, β = 77.21(1)°, γ = 76.18(1)°, V = 737.7(2) ų, ρ_calcd = 1.567 g/cm³, Z = 2. The crystals of complex II are monoclinic, space group P2₁/c, a = 10.390(1) Å, b = 11.982(1) Å, c = 7.624(1) Å, β = 102.61(1)°, V = 926.1(2) ų, ρ_calcd = 1.760 g/cm³, Z = 2. Discrete [CoL₂Cl₂] moieties are realized in the structure of complex I. The cobalt atom is tetrahedrally coordinated to the two nitrogen atoms of crystallographically nonequivalent ligands L and two chlorine atoms (Co(1)-N_avg, 2.051(4)Å; Co(1)-Cl(1), 2.241(1) Å; Co(1)-Cl(2), 2.263 Å; bond angles at the cobalt atom lie within a range of 102.1°–118.6°). The complexes are linked into supramolecular zigzag chains by N-H...N(Cl) hydrogen bonds. In the structure of complex II, the Cd²⁺ ion (at the inversion center) is coordinated in pairs to the nitrogen atoms of ligand L and the O(NO₃) and O(H₂O) oxygen atoms. The coordination of the Cd²⁺ ion is distorted octahedral (Cd(1)-N(1), 2.341Å; Cd(1)-O(1), 2.340(4) Å; Cd(1)-O(4), 2.327(3) Å; bond angles at the cadmium atom lie within a range of 79.1°–100.9°). N-H...N hydrogen bonds link the complexes into supramolecular chains. These chains are linked into a supramolecular framework by the O-H...O hydrogen bonds between water molecules and NO₃ groups.     

Structure of a new schiff base cobalt(III) complex with antibacterial activity

A new Schiff base cobalt(III) complex with the formula [CoL¹L²(N₃)]·NO₃ (L¹ is 2-[1-(2-phenylaminoethylimino)ethyl]phenolate, L² is N-phenylethane-1,2-diamine) is prepared and characterized by physicochemical methods and single crystal X-ray determination. The complex crystallizes in the triclinic system space group P-1, with a = 8.504(2) Å, b = 14.973(3) Å, c = 20.676(4) Å, α = 100.021(3)°, β = 90.005(3)°, γ = 103.084(2)°, V = 2523.0(9) ų, Z = 4, R ₁ = 0.0732, and wR ₂ = 0.1182. Single crystal X-ray diffraction analysis reveals that the complex contains two mononuclear [CoL¹L²(N₃)]⁺ cations and two nitrate anions. The Co atom is six-coordinated in an octahedral geometry. The ligands and the cobalt(III) complex are screened in vitro for their antibacterial activity against Bacillus subtillis, Staphylococcus aureus, Escherichia coli, and Pseudomonas aereuguinosa.     

Zigzag-shaped supramolecular networks formed via hydrogen bonding. Crystal structures,DNA binding,and cytotoxic activity of a new palladium(II) complex

A single-ligand complex Pd(II)-L-aspartic acid was synthesized and characterized by elemental ana-lysis and IR spectra. The crystal structure of the complex was determined by single crystal X-ray diffraction (crystallizing in orthorhombic crystal system, space group P2₁2₁2₁ with unit cell parameters a = 5.3145(11) Å, b = 9.6294(19) Å, c = 22.233(4) Å, and Z = 4). The Pd atom was four-coordinated with N(1), N(2), O(4), and O(5) from two L-aspartic ligands and formed a slightly distorted parallelogram geometry. 2D “zigzag” shaped supramolecular networks are constructed via hydrogen bonding. The binding of the title complex with fish sperm DNA (FS-DNA) has been investigated by absorption and fluorescence spectra and the results indicate that the complex bind to FS-DNA in an intercalative mode. Gel electrophoresis shows the cleavage of both supercoiled and circular pBR322 DNA to form a small molecular fragment under the action of the title complex. The cytotoxicity assay proves that the complex has strong anticancer activity to human cervix epitheloid carcinoma cell lines (HeLa).     

A new zinc(II) complex containing nitronyl nitroxide radicals: Synthesis, crystal structure, and magnetic properties

A new one-dimensional dicyanamide bridged zinc(II) complex containing nitronyl nitroxide radicals [Zn(Hfac)₂(NIT-1′-MeBzIm)] (NIT-1′-MeBzIm = 2-{2′-[(l′-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, Hfac = hexafluoroacetylacetonate) has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in monoclinic, space group P2₁/c, Z = 4. Crystal data: C₂₅H₂₁F₁₂N₄O₆Zn, Mr = 766.83, a = 12.1812(13) Å, b = 16.8770(18) Å, c = 15.5230(16) Å, β = 98.009(2)°, V = 3160.1(6) ų, ρ _c = 1.612 g/cm³, μ(MoK _α) = 0.893 mm^?1, F(000) = 1540, R = 0.0925 and wR = 0.2652 for 5875 observed reflections with I > 2σ(I). The X-ray analysis reveals that the zinc(II) ion is six-coordinated with a distorted octahedral geometry. These units develop as 1D species by intermolecular hydrogen bonds. Magnetic investigation indicates the existence of weak intermolecular interactions is antiferromagnetic with J = ?1.35 cm^?1, where the spin Hamitonian is defined as H = ?2Σ _i,j J _i,j S _i S within the complex.     

Crystal Structure of frans-Dichloro(c-Meso-3,5,7,7,10,12,14,14-Octamethyl-1,4,8,11 -Tetraaza Cyclotetradeca-4,11-Diene)Cobalt(lll) Perchlorate

The crystal structure of the title compound has been solved by X-ray diffraction. [CO(Cl)₂(N₄C₁₈H₃₆)]-(ClO₄), M_r = 537.79, triclinic, P1, a = 6.974(4), b = 8.530(1), c = 11.061(2) Å, α = 98.47(1), β = 106.56(3), γ = 93.02(3)°, V = 620.8(4) ų, Z = 1, Dx = 1.439 Mg m^?3, λ(MoKα) = 0.7093 Å, μ = 0.96 mm^?1, F(000) = 291.93, T = 297(3) K, R = 0.072, R_w = 0.085 for 2121 observed reflections. The Co(III) is six-coordinate with the four N atoms of the macrocyclic ligand equatorial and two Cl ions axial, thereby resulting in a tetragonally distorted octahedral geometry. Aside from the perchlorate group, there exists a non-crystallographic inversion center at the Co(III) ion for the macrocyclic ligand and the two Cl ions which are bonded to the Co(III) ion.     

Crystal structures of azido or thiocyanato-coordinated nickel(II) complexes with tridentate Schiff bases

A new azido-coordinated nickel(II) complex [NiL¹(N₃)] (1) and a new thiocyanato-coordinated nickel(II) complex [NiL²(NCS)] (2), where L¹ and L² are the monoanionic forms of Schiff bases 2-[(2-isopropylaminoethylimino)methyl]-6-methylphenol and 2-[(2-dimethlaminoethylimino)methyl]-6-methylphenol respectively, are prepared and structurally characterized by elemental analysis, IR spectra, and single crystal X-ray crystallography. Complex 1 crystallizes in the triclinic space group P-1 with unit cell dimensions a = 8.812(2) Å, b = 9.433(3) Å, c = 9.488(2) Å, α = 81.933(2)°, β = 69.925(2)°, γ = 84.591(2)°, V = 732.5(3) ų, Z = 2, R ₁ = 0.0291, and wR ₂ = 0.0734. Complex 2 crystallizes in the monoclinic space group P2₁/n with unit cell dimensions a = 7.4497(4) Å, b = 6.1933(3) Å, c = 31.5126(18) Å, β = 92.484(2)°, V = 1452.57(13) ų, Z = 4, R ₁ = 0.0307, and wR ₂ = 0.0668. The Ni atom in each of the complexes is coordinated by three donor atoms of the Schiff base ligand and by one N atom of the azide or thiocyanate ligand, forming a square planar geometry. The azide and thiocyanate anions readily coordinate to the complexes as secondary ligands.     

Synthesis of [M(NH3)5Cl](ReO4)2 (M = Cr, Co, Ru, Rh, Ir) and investigation of thermolysis products. Crystal structure of [Rh(NH3)5Cl](ReO4)2

Complex salts [M(NH₃)₅Cl](ReO₄)₂, where M = Cr, Co, Ru, Rh, Ir, have been prepared. The crystal structure of [Rh(NH₃)₅Cl](ReO₄)₂ was determined by single crystal X-ray diffraction. Crystal data: a = 17.369(4) Å, b = 7.7990(16) Å, c = 11.218(2) Å, V = 1430.5(5) ų, space group C2/m, Z = 4, d _calc = 3.19 g/cm³, R = 0.0447. Complex salts from the above series are shown to be isostructural; they were defined by X-ray crystallography. Thermal decomposition of the compounds in an inert atmosphere and under hydrogen has been studied. According to X-ray phase analysis (XRPA) data, the M_0.33Re_0.67 (M = Co, Ru, Rh, Ir) monophase solid solutions are the products of reduction of the salts under hydrogen.     

Synthesis and crystal structure of [Cr(NH<Subscript>3</Subscript>)<Subscript>5</Subscript>Cl][PdBr<Subscript>4</Subscript>]

A new binary complex salt — chloropentaamminechromium(III) tetrabromopalladate(II) [Cr(NH₃)₅Cl][PdBr₄] — has been synthesized. The compound was characterized by elemental, X-ray diffraction, and X-ray phase analysis. The salt is isostructural with the previously investigated compounds [M(NH₃)₅Cl][PtCl₄] (M = Ir, Rh, Ru, Co, Cr) and [CM(NH₃)₅Cl][PdBr₄] (M = Ir, Rh, Co). Crystallographic data: space group Pnma, a = 17.068(2) Å, b = 8.315(12) Å, c = 9.653(14) Å; V = 1370.0(3) ų, Z = 4, d _calc = 2.903 g/cm³.     

Synthesis and Study of Heterometallic Co–Bi Compounds Based on Ethylenediaminetetraacetic Acid. Crystal and Molecular Structures of [Co(DH)2(o-NH2C6H4CH3)2]2[Bi2(μ-Edta)2(H2O)2] · 10H2O (DH2 is dimethylglyoxime)

Compounds of the [Co(DH)₂A₂](BiEdta) · 6H₂O type (where DH is the monodeprotonated dimethylglyoxime ^–ON=C(CH₃)–(CH₃)C=NOH; A is the o-, m-, or p-toluidine; and Edta is the ethylenediaminetetraacetate(4–) ion) were synthesized and studied. The composition and structures of the complexes were determined from their UV and ¹H NMR spectra and from X-ray diffraction data. The isomer [Co(DH)₂(o-NH₂C₆H₄CH₃)₂]₂[Bi₂(μ-Edta)₂(H₂O)₂] · 10H₂O was structurally characterized using X-ray diffraction analysis. The crystals are triclinic: a = 12.153(2) Å, b = 12.824(3) Å, c = 16.215(3) Å, α = 67.73(3)°, β = 86.18(3)°, γ = 66.96(3)°, space group P $\overline 1$ , ρ(calcd) = 1.719 g/cm³, Z = 4. The structure is composed of complex binuclear [Bi₂(μ-Edta)₂(H₂O)₂]^2– anions, [Co(DH)₂(o-NH₂C₆H₄CH₃)₂]⁺ cations, and molecules of crystallization water. The Edta^4– anion chelates with the Bi atom in a hexadentate manner (N₂O₄); the fifth O atom functions as a bridging ligand. The bismuth coordination polyhedron can be regarded as a strongly distorted antiprism. In the octahedral cation, the Co(III) atom coordinates four N atoms of two DH ligands (average Co–N 1.897 Å) and two N atoms of two o-toluidine molecules (Co–N 2.023 Å). Thermolysis of the complexes studied was found to proceed in several successive steps, namely, the deaquation, deamination, and pyrolysis of the ligands.     

Synthesis,structure, and catalytic property of a mononuclear dioxomolybdenum(VI) complex containing MoON core

Reaction of molybdenyl(IV) oxide bis(2,4-pentanedionate) with N′-(3-ethoxy-2-hydroxybenzylidene)-2-methoxybenzohydrazide in methanol affords a mononuclear dioxomolybdenum(VI) complex containing MoO₅N basic core. The complex has been characterized by various physicochemical techniques (IR and elemental analysis), and single crystal X-ray diffraction. X-ray crystal structure determination reveals that the complex crystallizes as monoclinic space group P2₁/c, with unit cell dimensions a = 9.251(1), b = 11.910(2), c = 17.636(3) Å, β = 103.220(2)°, V = 1891.7(5) ų, Z = 4, R ₁ = 0.0693, wR ₂ = 0.1691. The Mo atom in the complex is octahedrally coordinated, with the tridentate ONO ligand occupying the meridional sites. Thermal stability analysis was performed. The complex shows high catalytic property for the oxidation of various olefins.     

Synthesis and crystal structure of a trinuclear copper(II) complex derived from N,N′-Bis(4-methoxysalicylidene)-1,3-pentanediamine

A trinuclear copper(II) complex [Cu₃Cl₂L₂], where L is the dianionic form of N,N′-bis(4-methoxysalicylidene)-1,3-pentanediamine, has been synthesized and characterized by means of spectroscopic methods and single crystal X-ray structure determination. The complex crystallizes in the orthorhombic space group Pnma with unit cell dimensions a = 15.301(2), b = 23.226(2), c = 12.089(1)Å, V = 4296.2(8) ų, Z = 4, R ₁ = 0.0682, and wR ₂ = 0.1590. The molecule of the complex possesses a crystallographic mirror plane symmetry with the mirror plane passes through the three Cu atoms and the two Cl atoms. The two terminal Cu atoms adopt distorted square pyramidal coordination, and the middle one adopts square planar coordination. The intramolecular Cu…Cu distances are 2.900(1) and 2.916(1) Å. The complex was tested for its antibacterial activity to assess its inhibiting potential.