Crystal structures and characterizations of (nitrato-O) (nitrato-O,O′)(η6-hexamethylbenzene)ruthenium(II) and di(trifluoroacetato-O)(H2O-O)(η6-hexamethylbenzene) ruthenium(II)

The title complexes [(HMB)Ru(NO3)2] (HMB = η6-C6Me6) (1) and [(HMB)Ru(O 2CCF3)2(H2O)] (2) were spectroscopically characterized and their structures were determined by single-crystal diffraction analysis. In both compounds, the Ru atom is η6-coordinated to a hexamethylbenzene ring and three oxygen donor atoms in a "three-legged piano stool" arrangement. In the asymmetric unit of 1, ruthenium atom is coordinated to two nitrato ligands, one of which is η1-O coordinated and the second bidentate via both oxygen atoms; while in the symmetric unit of 2, two disordered trifluoroacetate ligands are monodentate, symmetrically bound to the ruthenium atom, and the pseudo-octahedral geometry is completed by an oxygen atom from a H2O molecule, which is hydrogen-bonded to both acetate ligands. Copyright © 2005 Taylor & Francis, Inc.Link_to_subscribed_fulltex