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Crystal structure of a mononuclear copper(II) complex with 2-methoxy-N,N-bis-(quinolin-2-yl-meth-yl)-ethyl-amine (DQMEA).

ABSTRACT: Structural characterization of the compound [Cu(C2H3N)(C23H23N3O)](ClO4)2] or [Cu(C2H3N)(DQMEA)](ClO4)2] [DQMEA = 2-methoxy-N,N-bis-(quinolin-2-ylmeth-yl)ethyl-amine] {systematic name: (aceto-nitrile)[2-methoxy-N,N-bis(quinolin-2-ylmeth-yl)ethyl-amine]-copper(II) diperchlorate} by single-crystal X-ray diffraction reveals a complex cation with a tetra-dentate coordination of the DQMEA ligand along with monodentate coordination of a CH3CN ligand to a single CuII center, with two perchlorate anions providing charge balance. The CuII center has a distorted square-pyramidal geometry in which the nitro-gen atoms of the DQMEA and CH3CN ligands occupy the equatorial positions, while the oxygen atom of the DQMEA ligand resides in the axial position with an elongated Cu-O bond. The quinoline ring systems are nearly co-planar in the structure, while the linear CH3CN ligand is tilted significantly below this plane, and the central nitro-gen of DQMEA is above it. Within the complex, weak C-H⋯N hydrogen bonding takes place between the nitro-gen of CH3CN and a neighboring quinolyl group. The perchlorate ions are disordered within the structure, but undergo a number of weak inter-molecular C-H⋯O hydrogen-bonding inter-actions. Additional weak π-stacking inter-actions between the quinolyl groups of neighboring complexes further stabilize the crystal packing.

SUBMITTER: Frey ST

PROVIDER: S-EPMC6072998 | biostudies-literature |

REPOSITORIES: biostudies-literature

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