Combining coordination and hydrogen-bonds to form arene ruthenium metalla-assemblies

Twelve arene ruthenium metalla-cycles were obtained by combining three ureido-pyrimidone ligands and four dinuclear arene ruthenium complexes. Hydrogen-bonds between the ureido-pyrimidone moieties allow the formation of these mixed coordination- and hydrogen-bonded systems. This study confirms the effectiveness of hydrogen-bonds in constructing supramolecular assemblies.