Combining coordination and hydrogen-bonds to form arene ruthenium metalla-assemblies
نویسندگان
چکیده
Three ureido-pyrimidone derivatives (N-LH) were used to generate in combination with four dinuclear arene ruthenium clips, (p-cymene)2Ru2(OO∩OO)Cl2 (OO∩OO 1⁄4 oxalato, 2,5-dioxido-1,4-benzoquinonato, 2,5-dichloro-1,4-benzoquinonato, 5,8-dioxido-1,4-naphtoquinonato), twelve cationic arene ruthenium metalla-cycles of the general formula [(p-cymene)2Ru2(OO∩OO)(N-L)2]2(CF3SO3)4. The ureidopyrimidone moieties are able to form strong hydrogen-bonds by self-pairing, thus giving rise to dimeric structures in solution. In addition, to better understand the behavior of the tetranuclear metallacycles in solution, the neutral dinuclear arene ruthenium ureido-pyrimidone complexes of the general formula {(p-cymene)RuCl2(N-L )}2 were also prepared and characterized. All metalla-assemblies were studied in solution by NMR spectroscopy, confirming the high stability of the metalla-cycles and the usefulness of hydrogen-bonds in constructing supramolecular assemblies.
منابع مشابه
NMR spectroscopy and DFT calculations of a self-assembled arene ruthenium rectangle obtained from a combination of coordination and hydrogen bonds.
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