Alexander J. Blake, Neil R. Champness, Simon S. M. Chung, Wan-Sheung Li and Martin Schröder
Reaction of 1,2-trans-(4-pyridyl)ethene with AgBF4 results in the formation of a three-dimensional network based upon a cyclobutane-linked tetrapyridyl ligand, 1,2,3,4-tetrakis(4-pyridyl)cyclobutane, linked by AgI ions; the in situ formation of the ligand represents a potential new direction for inorganic crystal engineering.