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Dichloridobis{N-[(dimethyl-amino)dimethyl-silyl]-2,6-dimethyl-anilido-κN,N'}zirconium(IV).

ABSTRACT: The monomeric title zirconium(IV) compound, [Zr(C(12)H(21)N(2)Si)(2)Cl(2)], was prepared by the metathetical reaction of [LiN(SiMe(2)NMe(2))(2,6-Me(2)C(6)H(3))](2) with zirconium tetra-chloride. The Zr(IV) atom is N,N'-chelated by the N-silylated anilido ligand. Along with two Cl atoms, the six-coordinated Zr(IV) atom demonstrates a highly distorted octa-hedral geometry. The two ligands around the Zr(IV) atom are arranged cis to each other and obey the C(2) symmetry operation. That means the asymmetric unit consists of only half of the mol-ecular compound and the complete mol-ecule is generated by a twofold axis. The two ends of the N-Si-N chelating unit exhibit different affinities for the metal center. The Zr-N(amino) bond is longer than the Zr-N(anilido) bond.

SUBMITTER: Chen J

PROVIDER: S-EPMC2970990 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Chloridobis{N-[(dimethyl-amino)dimethyl-silyl]-2,6-dimethyl-anilido-κN,N'}iron(III).

Project description:The title iron(III) compound, [Fe(C(12)H(21)N(2)Si)(2)Cl], is monomeric. The Fe atom is N,N'-chelated by the N-silylated anilide ligand. The two ligands around the Fe atom are arranged trans to each other. The Fe-N(amino) bond is longer than the Fe-N(anilide) bond by about 0.37 Å. The mol-ecule displays a pseudo-twofold rotation. The five-coordinate Fe atom demonstrates a highly distorted trigonal-bipyramidal geometry.

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Project description:The title compound, [CoCl(2)(C(10)H(11)N(3))(2)]·2CH(3)OH, crystallizes with an elongated Co coordination polyhedron in a very distorted octa-hedral geometry. Both naphthyridine ligands coordinate to the Co atom via two N atoms in a bidentate chelating mode. The remaining coordination sites are occupied by two Cl atoms. Two uncoordinated solvent methanol mol-ecules are hydrogen bonded to the Cl atoms. Additional N-H⋯O, C-H⋯Cl and N-H⋯Cl hydrogen bonds, and π-π stacking inter-actions [centroid-centroid distance 3.664 (4) Å], give rise to a three-dimensional network structure.

| S-EPMC2915083 | biostudies-literature

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Project description:In the title cobalt(II) compound, [Co(C(12)H(21)N(2)Si)Cl(C(6)H(16)N(2))], the ethane-1,2-diamine donor mol-ecule coordin-ates the metal atom in an N,N'-chelating mode, with Co-N distances of 2.136 (2) and 2.140 (3) Å. An anilide ligand connects to the Co(II) atom with a σ-bond, the Co-N(anilide) distance being 1.931 (2) Å. The four-coordinate Co(II) atom demonstrates a slightly distorted tetra-hedral geometry.

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Dichloridobis(3,5-dimethyl-1H-pyrazol-4-amine-κN)cobalt(II).

Project description:In the title compound, [CoCl(2)(C(5)H(9)N(3))(2)], the Co(II) atom adopts a slightly distorted tetra-hedral coordination geometry provided by two chloride anions and two N atoms from the organic ligands. The dihedral angle between the pyrazole rings is 85.91 (10)°. In the crystal structure, mol-ecules are linked into a three-dimensional network by inter-molecular N-H⋯N and N-H⋯Cl hydrogen-bonding inter-actions.

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