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Dichloridobis(3,4,5-trimethyl-1H-pyrazole-κN)cobalt(II).

ABSTRACT: In the title compound, [Co(II)Cl(2)(C(6)H(10)N(2))(2)], a pair of 3,4,5-trimethyl-pyrazoles act as monodentate ligands. Two Cl(-) anions are also bonded directly to the Co(II) atom, which has a CoN(2)Cl(2) chromophore in a slightly distorted tetra-hedral geometry. The two mol-ecules in the asymmetric unit are related by an approximate twofold rotation roughly parallel to the a axis. The amino H atom in the pyrazole ring participates in weak N-H⋯Cl hydrogen bonds to form chains that propagate roughly parallel to the c axis.

SUBMITTER: Lyubartseva G

PROVIDER: S-EPMC3007936 | biostudies-literature | 2010 Aug

REPOSITORIES: biostudies-literature

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Dichloridobis(3,4,5-trimethyl-1H-pyrazole-κN)cobalt(II).

Lyubartseva Ganna G Parkin Sean S

Acta crystallographica. Section E, Structure reports online 20100821 Pt 9

In the title compound, [Co(II)Cl(2)(C(6)H(10)N(2))(2)], a pair of 3,4,5-trimethyl-pyrazoles act as monodentate ligands. Two Cl(-) anions are also bonded directly to the Co(II) atom, which has a CoN(2)Cl(2) chromophore in a slightly distorted tetra-hedral geometry. The two mol-ecules in the asymmetric unit are related by an approximate twofold rotation roughly parallel to the a axis. The amino H atom in the pyrazole ring participates in weak N-H⋯Cl hydrogen bonds to form chains that propagate rou ...[more]

PMID: 21588534

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trans-Bis(thio-cyanato-κN)tetra-kis-(3,4,5-trimethyl-1H-pyrazole-κN)nickel(II)-3,4,5-trimethyl-1H-pyrazole (1/1).

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Project description:In the title complex, [CuCl(2)(C(9)H(12)N(4))], the Cu(II) atom exhibits a distorted square-planar coordination geometry involving two chloride ions and two N-atom donors from the bipyrazole ligand. The chelate ring including the Cu(II) atom is essentially planar, with a maximum deviation of 0.0181 (17) Å for one of the coordinated N atoms. This plane forms a dihedral angle of 30.75 (6)° with the CuCl(2) plane. In the crystal, each pair of adjacent mol-ecules is linked into a centrosymmetric dimer by N-H⋯Cl hydrogen bonds. The crystal structure is stabilized by inter-molecular C-H⋯N and C-H⋯Cl hydrogen bonds and weak slipped π-π stacking inter-actions between symmetry-related mol-ecules, with an inter-planar separation of 3.439 (19) Å and a centroid-centroid distance of 3.581 (19) Å.

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Project description:In the title complex, [Cu(C(15)H(19)N(2))(2)] or [Cu(L(2))] (HL is 3,3',4,4',5,5'-hexa-methyl-pyrromethene), the Cu(II) atom is coordinated by four N atoms [Cu-N 1.939 (2)-1.976 (2) Å] from two L ligands in a distorted tetra-hedral geometry. The mean planes of the CuN(2)C(3) metallocyclic rings form a dihedral angle of 72.73 (6)°. In the L ligands, the pyrrole rings are inclined to each other at dihedral angles of 3.03 (7) and 9.83 (7)°. The crystal packing exhibits weak inter-molecular C-H⋯π inter-actions, which form chains in [100].

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