1-D cyano-bridged heterometallic complexes consisting of 1,4,8,11-tetraazacyclotetradecanesilver(II) and tetracyanopalladium(II) or tetracyanoplatinum(II)

Two unprecedented bimetallic Ag(II) coordination polymers were synthesized and characterized in this paper. Treatment of [Ag(cyclam)](ClO4)2 and K2[Pd(CN)4]·3H2O generated [Ag(cyclam)Pd(CN)2(μ-CN)2]n (1). Reaction of [Ag(cyclam)](ClO4)2 with K2[Pt(CN)4]·3H2O afforded [Ag(cyclam)Pt(CN)2(μ-CN)2]n (2). The structures of 1 and 2 are similar and consist of 1-D zigzag chains which are linked via intermolecular hydrogen bonding interactions to give rise to 3-D networks. The structural features, IR, ESR and magnetic properties are discussed, respectively. To our knowledge, the complexes reported here are the first example of bimetallic Ag(II) coordination polymers with weak antiferromagnetic spin coupling. The primary results presented here can give an insight into the assembly of Ag(II) coordination polymers.