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Chloridobis(dimethyl-glyoximato-κN,N')(ethyl pyridine-4-carboxyl-ate-κN)cobalt(III) chloro-form monosolvate.

ABSTRACT: The title compound, [Co(C(4)H(7)N(2)O(2))(2)Cl(C(8)H(9)NO(2))]·CHCl(3), was synthesized as a model complex of vitamin B(12). The Co(III) cation displays an approximately octa-hedral coordination environment, being displaced by 0.0240 (15) Å from the mean plane of the four N atoms of the equatorial plane. The O-H distances in the dimethyl-glyoximate hy-droxy groups are 0.89 (6) and 1.14 (6) Å; such long O-H bonds are very common in cobaloxime derivatives. Weak classical O-H⋯N and non-classical C-H⋯Cl hydrogen-bonding interactions further consolidate the crystal packing.

SUBMITTER: Wang N

PROVIDER: S-EPMC3274923 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Chloridobis(dimethyl-glyoximato-?N,N')(ethyl pyridine-3-carboxyl-ate-?N)cobalt(III).

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Project description:The Co centre in the title compound, [Co(C(14)H(11)N(2)O(2))(2)Cl(C(3)H(4)N(2))]·0.5H(2)O, shows a slightly distorted octa-hedral coordination geometry. The glyoximate units of the mol-ecule are linked by O-H?O hydrogen bonds with the H atom almost in the middle of the two O atoms. The crystal packing is stabilized through inter-molecular N-H?O, N-H?N and O-H?Cl hydrogen bonds. The uncoordinated water mol-ecule shows half-occupation.

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(N-n-Butyl-pyridine-4-carbothio-amide-?N)chloridobis(dimethyl-glyoximato-?N,N')cobalt(III) hemihydrate.

Project description:The title compound, trans-[Co(C(4)H(7)N(2)O(2))(2)Cl(C(10)H(14)N(2)S)]·0.5H(2)O, contains two independent mol-ecules in the asymmetric unit in which the Co(III) ions are coordinated in slightly distorted octa-hedral coordination environments. The bis-chelating glyoximate ligands, which occupy equatorial sites, are linked by interligand O-H?O hydrogen bonds. The dihedral angles between the mean planes of the glyoximate ligands in each mol-ecule are 2.07?(8) and 1.60?(1)°. The asymmetric unit contains a solvent water mol-ecule which is disordered over two sites with refined occupancies 0.64?(2) and 0.36?(2).

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Aqua-chloridobis(diphenyl-glyoximato-?N,N')cobalt(III) dihydrate.

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