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Structural characterization of two benzene-1,2-di-amine complexes of zinc chloride: a mol-ecular compound and a co-crystal salt.


ABSTRACT: The structures of two zinc complexes containing bidentate benzene-1,2-di-amine ligands are reported. (Benzene-1,2-di-amine-κ(2) N,N')di-chloro-idozinc, [ZnCl2(C6H8N2)], (I), displays a distorted tetra-hedral coordination sphere for the metal cation. The di-amine ligand and the Zn atom reside on a crystallographic mirror plane. In the 1:1 co-crystal salt trans-di-aqua-bis-(4,5-di-methyl-benzene-1,2-di-amine-κ(2) N,N')zinc chloride-4,5-di-methyl-benzene-1,2-di-amine (1/1), [Zn(C8H12N2)2(H2O)2]Cl2·2C8H12N2, (II), the zinc(II) complex cation exhibits a tetra-gonally distorted octa-hedral coordination sphere. The Zn atom sits on a crystallographically imposed inversion center and the di-amine ligands are tilted 30.63 (6)° with respect to the ZnN4 plane. Both complexes exhibit extensive hydrogen bonding. In (I), a stacked-sheet extended structure parallel to (101) is observed. In (II), the co-crystallized di-amine is hydrogen-bonded to the complex cation via O-H⋯N and N-H⋯N linkages. These units are in turn linked into planes along (200) by O-H⋯Cl and N-H⋯Cl hydrogen bonds.

SUBMITTER: Zick PL 

PROVIDER: S-EPMC4992933 | biostudies-literature |

REPOSITORIES: biostudies-literature

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