12 research outputs found

    Synthesis, characterization and ferromagnetic behavior of [Co<sup>III</sup>(en)<sub>2</sub>(RC<sub>6</sub>H<sub>4</sub>NH<sub>2</sub>)I]I<sub>2</sub>.H<sub>2</sub>O complexes

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    171-175Mixed ligand cobalt(III) complexes containing aryl amine (RC6H4NH2) ligand have been synthesized using a modified route developed in this study. A wide range of complexes, [CoIII(en)2(L)I]I2.H2O, (where L = RC6H4NH2; R = m-OMe, p-F, H, m-Me, p-Me, p-OEt and p-OMe) show promising reactivities and physical properties due to the presence of electron donor/acceptor groups in the aryl ligand. The complexes have been characterized by elemental analysis, FT-IR, UV-vis and powder X-ray diffraction patterns. FT-IR ν(M-X) and UV-vis spectral data are compatible with trans-form of the complexes. Magnetic studies yield magnetic remanence Mr = 7.071 ´ 10-3 – 3.069 ´ 10-5 emu/g and intrinsic coercivity, -Hci = 141-1156 Oe. Linear regression plot of Mr versus σ yields negative slope, implying that electron withdrawing group in RC6H4NH2 (σ > 0) enhances ferromagnetic character while the electron donating groups (σ 6H4NH2 ligand illustrate a simple molecular fabrication technique, which can be suitably integrated into a system, to have some control on the behavior of metal complexes. A modified ferromagnetic character due to charge build up on the metal centre by ligating nitrogen atom, which in turn makes the molecule into a centre of systematic variation in magnetization, has been observed

    cis-Diaquatetrakis(1-butyl-1H-imidazole-&#954;N3)nickel(II) dichloride

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    In the title compound, [Ni(C7H12N2)4(H2O)2]Cl2, the nickel(II) ion has a distorted octahedral coordination environment. It is surrounded by three N atoms and one O atom occupying the equatorial plane, and one N and one O atom in the axial positions. The imidazole ring systems are inclined to one another with dihedral angles varying between 38.3&#8197;(4) and 74.1&#8197;(4)&#176;. In the crystal, molecules are linked via O&#8212;H...Cl hydrogen bonds involving one Cl&#8722; anion and the water molecule in the equatorial plane, forming an inversion dimer-like arrangement. The water molecule in the axial position is hydrogen-bonded to both Cl&#8722; anions. There are also a number of C&#8212;H...Cl hydrogen bonds present, forming a three-dimensional structure. All four alkyl chains are disordered over two positions with refined occupancy ratios of 0.395&#8197;(15):0.605&#8197;(15), 0.658&#8197;(14):0.342&#8197;(14), 0.332&#8197;(11):0.668&#8197;(11) and 0.622&#8197;(12):0.378&#8197;(12)

    Crystal structure of trans-aqua(perchlorato-κO)bis(propane-1,3-diamine-κ2N,N′)copper(II) perchlorate

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    In the title compound, [Cu(ClO4)(C3H10N2)2(H2O)]ClO4, the CuII atom has a distorted octahedral coordination sphere and is coordinated by the N atoms of two propane-1,3-diamine ligands in the equatorial plane. The axial positions are occupied by a water O atom and an O atom of a disordered perchlorate anion [occupancy ratio 0.631 (9):0.369 (9)]. In the crystal, the various components are linked via O—H...O, N—H...O and C—H...O hydrogen bonds, forming sheets lying parallel to (001)

    cis-Bromido(methylamine)bis(propane-1,3-diamine)cobalt(III) dibromide

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    In the title compound, [CoBr(CH5N)(C3H10N2)2]Br2, the cobaltIII ion has a distorted octahedral coordination environment and is surrounded by four N atoms in the equatorial plane, with an additional N atom and the Br atom occupying the axial positions. In the crystal, the complex cation and the two counter anions are linked via N&#8212;H...Br and C&#8212;H...Br hydrogen bonds, forming a three-dimensional network

    Diaquadichloridobis(pyridine-&#954;N)cobalt(II)

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    The title molecule, [CoCl2(C5H5N)2(H2O)2], has -1 symmetry with the CoII ion situated on an inversion centre. The cation has a distorted octahedral coordination environment and is surrounded by two N and two Cl atoms in the equatorial plane, while the coordinating water O atoms occupy the axial positions. The crystal exhibits nonmerohedral twinning with two domain states, the volume fractions of which were refined to 0.883&#8197;(2) and 0.117&#8197;(3). The crystal packing is stabilized by O&#8212;H...Cl hydrogen-bond interactions, forming two-dimensional networks lying parallel to (001). The crystal packing also features &#960;&#8211;&#960; interactions between the pyridine rings, with centroid&#8211;centroid separations of 3.493&#8197;(3) and 3.545&#8197;(3)&#8197;&#197;

    catena-Poly[[[bis(1H-imidazole-κN3)zinc(II)]-μ2-imidazol-1-ido-κ2N:N′] nitrate]

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    The title compound, {[Zn(C3H3N2)(C3H4N2)2]NO3}n, is a one-dimensional coordination polymer along [01-1] with the ZnII atom coordinating to four imidazole/imidazolide rings. The ZnII atom has a regular tetrahedral geometry with the planes of the two monodentate imidazole rings inclined to one another by 87.94 (17)°, while the planes of the bridging imidazolide rings are inclined to one another by 39.06 (17)°. In the crystal, the chains are linked via bifurcated N—H...(O,O) hydrogen bonds, forming sheets parallel to (001). These two-dimensional networks are linked via C—H...O hydrogen bonds and a C—H...π interaction, forming a three-dimensional structure

    Crystal structure of trans

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    catena

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