A new 2D heterometallic Cu/Cd mixed-anion polymer with dicyanamide and thiocyanate bridges formed via the reaction of elemental copper, cadmium dicyanamide and ethylenediamine

The new heterometallic 2D polymer [Cu(en)2Cd(dca)2(SCN)2]n (en=ethylenediamine; dca=dicyanamide, N(CN)2−), the first example of a compound containing the unique mixed-anion Cd(dca)2(SCN)22− fragment, has been prepared from copper powder, cadmium dicyanamide, ammonium thiocyanate and ethylenediamine in methanol solution in air. The polymeric sheets of the compound comprise two different rings – 28-membered [Cu2Cd4(μ1,5-dca)2(μ1,3-NCS)4] macrocycles in which two 12-membered [Cd2(μ1,5-dca)2] rings form sections.