Synthesis and characterization of a tetraruthenium butterfly cluster containing a quadruply-bridging ligand derived from an N,N′-dipyrid-2-ylurea |
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| Authors: | Javier A Cabeza Ignacio del Río Daniel Miguel |
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| Institution: | a Departamento de Química Orgánica e Inorgánica, Instituto de Química Organometálica “Enrique Moles”, Universidad de Oviedo-CSIC, E-33071 Oviedo, Spain
b Area de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, E-47071 Valladolid, Spain |
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| Abstract: | The tetraruthenium cluster complex Ru4(μ4-κ4-dmpu)(CO)10], H2dmpu = N,N′-bis(6-methylpyrid-2-yl)urea, has been prepared by treating Ru3(CO)12] with H2dmpu in toluene at reflux temperature. An X-ray diffraction study has determined that this cluster has a butterfly metallic skeleton hold up by a doubly-deprotonated N,N′-bis(6-methylpyrid-2-yl)urea ligand (dmpu). This ligand has the pyridine N atoms attached to the wing-tip Ru atoms and the amido N atoms spanning Ru-Ru wing-edges, in such a way that the cluster has C2 symmetry. The donor atoms of doubly-deprotonated N,N′-dipyrid-2-ylureas seem to be appropriately arranged to hold butterfly tetranuclear clusters. |
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| Keywords: | Ruthenium Butterfly clusters N N&prime -Bis(6-methylpyrid-2-yl)urea N N&prime -Bis(2-picolin-6-yl)urea N N&prime -Dipyrid-2-ylureas 2-Amidopyridine ligands |
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