A Novel 3‐D Heterobimetallic Cyano‐bridged Coordination Polymer Incorporating Ag···Ag Interaction: [Cu(dien)Ag(CN)2]2[Ag2(CN)3][Ag(CN)2]

A three‐dimensional cyano‐bridged copper(II) complex, [Cu(dien)Ag(CN)2]2[Ag2(CN)3][Ag(CN)2] (1) (dien = diethylenetriamine), has been prepared and characterized by X‐ray crystallography. Complex 1crystallized in the monoclinic space group P21/nwith a= 6.988(2), b= 17.615(6), c= 12.564(4) Å, β= 90.790(5)°. The crystal consists of cis‐[Cu(dien)]2+units bridged by [Ag(CN)2]—to form a zig‐zag chain. The Ag atoms of the free and bridging [Ag(CN)2]—link together to form additional infinite zig‐zag chains with short Ag···Ag distances. The presence of Ag···Ag interactions effectively increases the dimensionality from a 1‐D chain to a 3‐D coordination polymer.