A trinuclear aqua cyano-bridged ruthenium complex [{eta(5)-C5H5)(PPh3)(2)-Ru(mu-CN)}(2)RuCl2(PPh3)H2O)]PF6: Synthesis, characterization and crystal structure

摘要

The organometallic trinuclear aqua cyano-bridged complex [{(eta(5)-C5H5)(PPh3)(2)Ru(mu-CN)}(2)RuCl2(PPh3)(H2O)]PF6 (1), in which the fragment [RuCl2(PPh3)(H2O)] acts as a bridge and an acceptor group between the two terminal cyclopentadienyl ruthenium cyano moieties, was isolated in moderate yield from the reaction of [(eta(5)-C5H5)(PPh3)(2)RuCN] with [RuCl2(PPh3)(3)] in THR To the best of our knowledge, compound 1 is one of the few examples of a trinuclear array of ruthenium fragments bridged by the nitrogen atom of the -C equivalent to N- group (Ru-C equivalent to N-Ru'-N equivalent to C-Ru) with a Ru-coordinated water molecule. The new aqua complex was structurally characterized by FTIR, H-1, C-13, and P-31 NMR spectroscopy, mass spectrometry, elemental analysis, single-crystal X-ray diffraction, and cyclic voltammetry. The title complex crystallizes in a triclinic unit cell a = 17.3477(6) angstrom, b = 17.8551(5) angstrom, c = 18.2460(7) angstrom, a = 95.693(2)degrees, beta = 111.648(2)degrees, and gamma = 97.839(2)degrees in the space group Pi with Z = 2. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007).