{Bis[2-(pyridin-2-yl)eth-yl]amine}-dibromidocopper(II)

Area of Science:

• Inorganic Chemistry
• Crystallography
• Coordination Chemistry

Background:

• Understanding the coordination chemistry of copper(II) complexes is crucial for developing new materials.
• The study of crystal structures provides insights into molecular geometry and intermolecular interactions.
• Copper(II) complexes with nitrogen-containing ligands are of interest due to their diverse applications.

Purpose of the Study:

• To determine the crystal structure of the [CuBr2(C14H17N3)] complex.
• To analyze the coordination environment of the copper(II) atoms.
• To investigate the intermolecular interactions in the solid state.

Main Methods:

• Single-crystal X-ray diffraction was used to elucidate the crystal structure.
• The coordination geometry was analyzed using the continuous shape measure (CSM) parameter, τ.
• Intermolecular interactions were identified and characterized using graph set notation.

Main Results:

• The crystal structure of [CuBr2(C14H17N3)] contains two independent molecules in the asymmetric unit.
• The copper(II) atoms exhibit five-coordinate environments, existing on a spectrum between square-pyramidal and trigonal-bipyramidal geometries (τ = 0.442 and 0.574).
• The independent molecules form linked dimers through N-H⋯Br and C-H⋯Br hydrogen bonds, described by the graph set notation R²₄(8).

Conclusions:

• The study successfully determined the detailed crystal structure of the copper(II) complex.
• The coordination geometry of the copper(II) centers is distorted, lying between ideal square-pyramidal and trigonal-bipyramidal geometries.
• The formation of dimers via hydrogen bonding plays a significant role in the extended crystal structure.