Crystal Structures and Characterizations of (Nitrato-O)(Nitrato-O,O′)(η6-Hexamethylbenzene)Ruthenium(II) and Di(Trifluoroacetato-O)(H2O-O)(η6-Hexamethylbenzene) Ruthenium(II)

Abstract

The title complexes [(HMB)Ru(NO3)2] (HMB=η6-C6Me6) (1) and [(HMB)Ru(O2CCF3)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. Crystallographic data for 1 and 2 have been deposited at the Cambridge Crystallographic Data Centre with CCDC numbers 270839 and 270840, respectively. Copies of the information can be obtained free of charge from The Director, CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax: +44(0)1223-336033; e-mail: deposit@ccdc.cam.ac.uk or http://www.ccdc.cam.ac.uk).