Interpenetrating Copper–Silver Cyanometallate Networks: Polymorphs and Topological Isomers

Caught in the net: A series of mixed copper(I)–silver(i) cyanide complexes of the form A[Ag2Cu(CN)4] (A=K, Rb, Cs) have been found to form interpenetrating layer structures and three-dimensional networks (see picture). Two different forms of the Rb and Cs compounds are observed, which are both topological isomers and polymorphs.