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The classification by Wells [1] of framework materials according to their topological structures allows a general understanding of solid-state structures. Of the structural types depicted by Wells the majority are based upon three-and four-connected topologies which are commonly found in framework materials such as zeolites and, more recently, in coordination polymers.[2] Much of this latter work has focussed on d-block metal ions using three-,[3] four-,[4] or sixconnected nodes,[5] and more recently, examples of fiveconnected structures have been reported.[5a, 6] Three-dimensional structures with high connectivity are familiar in the form of the NaCl lattice (6: 6 coordination: connectivity) or CsCl (8: 8 coordination: connectivity), but examples of sixconnected structures are still rare for coordination framework polymers,[5] and connectivities higher than this are unknown. Due to their limited coordination numbers, it is …