Crystal structures of tetramethylammonium (2,2′-bipyridine)tetracyanidoferrate(III) trihydrate and poly[[(2,2′-bipyridine-κ<sup>2</sup><i>N</i>,<i>N</i>′)di-μ<sub>2</sub>-cyanido-dicyanido(μ-ethylenediamine)(ethylenediamine-κ<sup>2</sup><i>N</i>,<i>N</i>′)cadmium(II)iron(II)] monohydrate]
Acta crystallographica. Section E, Crystallographic communications