Bimetallic sheet and 3D threefold interpenetrating diamond-like network constructed by chelate Cu cations and Mn dicyanamide polymeric chains.: Synthesis, crystal structure, and magnetism of [Cu(L)2][Mn(dca)4] (L = ethylenediamine or 1,3-diaminopropane; dca = dicyanamide N(CN)2-)

Two novel bimetallic coordination polymers, [Cu(en)(2)][Mn(dca)(4)] (1) and [Cu(pn)(2)][Mn(dca)(4)] (2) (en, ethylenediamine; pn, 1,3-diaminopropane; dca, dicyanamide N(CN)(2)(-)), have been synthesized and characterized. Both of them consist of Mn-dca anionic chains and chelate cations of copper. I has a sheet like architecture built by the [Cu(en)(2)](2+) cations and the homoleptic trans-[Mn(dca)(4)(2-)](n) chains. 2 shows unusual 3-D threefold interpenetrating diamond-like structure constructed by [Cu(pn)(2)](2+) cations and the homoleptic cis-[Mn(dca)(4)(2-)](n) Chains. The magnetic susceptibilities obey the Curie-Weiss law with weak antiferromagnetic interactions. (C) 2002 Elsevier Science B.V. All rights reserved.