Influence of the alkaline earth cations on the topology of MII/CuII mixed-metal-organic frameworks (M = Ca, Sr and Ba)

The use of the mononuclear copper(ii) complex, [Cu II(Me 2pma) 2] 2- (Me 2pma = N-2,6-dimethylphenyloxamate), as a bis(bidentate) metalloligand toward solvated alkaline earth metal cations affords a new series of oxamato-bridged heterobimetallic two-dimensional compounds with mixed square-octagonal [Ca II 2Cu II 3] or square [M II 2Cu II 3] (M = Sr and Ba) layered structures of (4·82) and (44·62) net topologies, respectively. © 2012 The Royal Society of Chemistry.