catena-Poly[[bis(4-methylpyridine-κN)cobalt(II)]-di-μ-dicyanamido-κ2 N 1:N 5]
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چکیده
Cobalt(II) nitrate hexa-hydrate and sodium dicyanamide self-assembled in dimethyl-formamide (DMF) and 4-methyl-pyridine solutions to form the title compound, [Co(C(2)N(3))(2)(C(6)H(7)N)(2)](n). The Co(2+) ion lies on an inversion center and adopts an octa-hedral coordination geometry in which four N atoms from four different dicyanamide ligands lie in the equatorial plane and two 4-methyl-pyridine N atoms occupy the axial positions. The Co(II) atoms are connected by two bridging dicyanamide ligands, resulting in a chain parallel to the c axis. The chains are connected into a three-dimensional network by C-H⋯N hydrogen bonds.
منابع مشابه
catena-Poly[[bis(1-ethylimidazole-κN 3)cobalt(II)]-μ-isophthalato-κ2 O 1:O 3]
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The title compound, [Cd(NCS)(2)(C(6)H(5)N(5))(2)](n), is a coordination polymer with the Cd(II) centre located on a twofold rotation axis. The Cd(II) centre assumes a distorted octa-hedral geometry. The thio-cyanate anions function as bridging ligands between the Cd(II) centres, leading to a chain-like arrangement expanding along [001].
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The title compound, [Co(C(2)N(3))(2)(C(3)H(7)NO)(2)](n), is a triclinic polymorph of the previously reported monoclinic structure [Tong et al. (2003 ▶). Acta Cryst. E59, m405-m407]. The Co(II) ion lies on an inversion centre and adopts an almost regular octa-hedral N(4)O(2) coordination geometry. Adjacent Co(II) atoms are connected by two bridging dicyanamide ligands, resulting in the formation...
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The structure of the title compound, [N(C2H5)4]2[Co2(C2N3)5(H2O)4](C2N3), is a new example of a metal-dicyanamide coordination polymer which exhibits a unique three-dimensional framework of covalently linked CoII chains. All bridging dicyanamide ligands in the title structure are in the μ1,5-bridging mode. The anionic CoII-dicyanamide network is templated by tetra-ethyl-ammonium cations residin...
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