Polymeric Tris[trimethyltin( IV )]hexacyanocobaltate( III ), a Compound Non‐Analogous to “Super Prussian Blue,” and Its Tris[tricyclopentadienyluranium( IV )] Homologue

The coordination polymer 1 with a three‐dimensional network of Co atoms is formed as shown below. Distorted octahedral Co(CN)6 structural units are present in 1, which are linked through SnMe3 bridges such that the partial structures …CoCN → SnMe3 ← NCCo… are formed. The Sn atoms are coordinated trigonal‐bipyramidally. Since, surprisingly, two‐thirds of the chains are nonlinear, no super Prussian blue analogue can form; such an analogue should contain cubic Co8 cages. equation image