New bidimensional honeycomb CoII-FeIII and brick wall FeII-CoIII cyanido-bridged coordination polymers: Synthesis, crystal structures and magnetic properties

New bidimensional cyanido-bridged heterometallic coordination polymers, [CoII3FeIII2] and [FeII3CoIII2], have been assembled following the building-block approach. The cobalt(II)-iron(III) derivative shows a ferromagnetic order below 3 K.