Crystal structure of di-μ-iodido-bis{[bis(piperidin-1-yl)methane-κ(2) N,N′]copper(I)}

The title compound, [Cu(2)I(2)(C(11)H(22)N(2))(2)], crystallizes as a symmetric dimer with one quarter of the mol­ecule in the asymmetric unit. The copper(I) atom, the iodine atom and the central methyl­ene C atom of the di(piperidin-1-yl)methane ligand lie on a mirror plane and the complete molecule exhibits point group symmetry 2/m. To the best of our knowledge it is the first di­amine copper(I) complex containing a four-membered chelate ring. Compared to other di­amine copper(I) iodide dimers, the title compound has a short Cu⋯Cu distance of 2.5137 (11) Å, but a long Cu—N bond length of 2.213 (3) Å. The I—Cu—I angle [121.84 (2)°] is large, and the N—Cu—N angle = 66.61 (13)° is the smallest one found for copper(I) di­amine complexes. As a result of the four-membered ring, the ligands around the copper(I) atom have an extremely distorted tetra­hedral arrangement. In the crystal, there are no significant inter­molecular inter­actions present.