Royal Society of Chemistry, Chemical Communications, 3, p. 270-271, 2004
DOI: 10.1039/b313435k
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Di- 1a and tetranuclear 1b metal–organic squares have been obtained from bis- and tetra(pyridyl)cyclobutanes synthesized in the solid state, respectively; for 1b, a cyclobutane with two different metal binding subunits supports the formation of a polygon and polyhedron.