In this article Angelo Amoroso and coworkers display reversible co-ordination chemstry, where the complexes formed are dependant upon the solvent present:
The co-ordination chemistry of bis(2,2′-bipyrid-6′-yl)ketone with first row transition metals: The reversible interconversion of a mononuclear complex and a dinuclear hemiketal containing species
James C. Knight, Angelo J. Amoroso, Peter G. Edwards, Ravi Prabaharan and Neha Singh, Dalton Trans., 2010, Advance Article
DOI: 10.1039/C0DT00344A
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