Crystal structure of [tris(pyridin-2-ylmethyl)amine-κ4N]copper(II) bromide

Abstract

In the asymmetric unit of the title compound, [CuBr(C18H18N4)]Br, there are three crystallographically independent cations. One of the cations exhibits positional disorder of the pyridin-2-ylmethyl groups over two sets of sites with refined occupancies of 0.672 (8) and 0.328 (8). The outer-sphere bromine counter-ion is severely disordered over multiple sites. In each cation, the CuII ion is coordinated by the four N atoms of the tris(pyridin-2-ylmethyl)amine ligand and one bromine and adopts a slightly distorted trigonal–bipyramidal geometry.

Keywords

• crystal structure
• five-coordinate copper(II) complex
• Atom Transfer Radical Addition (ATRA)
• ligand disorder