Crystal structure of {(but-3-en-1-yl)bis[(pyridin-2-yl)methyl]amine-κ 3 N , N ′, N ′′}dichloridocopper(II) diethyl ether hemisolvate

The five-coordinate Cu II atom in the title complex [CuCl 2 (C 16 H 19 N 3 )]·0.5C 4 H 10 O, adopts a near-ideal square-pyramidal geometry (τ-5 = 0.01). The apical Cu—Cl distance is 0.2626 (6) Å longer than the basal Cu—Cl distance. Weak C—H...Cl interactions between pyridine rings and the Cl atoms of adjacent complex molecules are present. The solvent molecule, located on a twofold rotation axis, is situated in the voids of this arrangement. Copper atoms coordinated by tridentate nitrogen-containing ligands have been found to be excellent promoters of Atom Transfer Radical Addition (ATRA) reactions.