Design and construction of a new class of scaffolding-like materials comprising infinite polymeric frameworks of 3D-linked molecular rods. A reappraisal of the zinc cyanide and cadmium cyanide structures and the synthesis and structure of the diamond-related frameworks N(CH3)4CuIZnII(CN)4 and CuI4,4',4'',4'''-tetracyanotetraphenylmethaneBF4.xC6H5NO2 | Synapse