A trinuclear ruthenium (II) complex with rare S, O-bridging sulfoxide ligands

摘要

The trimetallic compound [Ru_3(#mu#-mpso-S, O)_2(#mu#-Cl)_4(mpso-S)_4Cl_2] (mpso=C_7H_8OS, methyl phenyl sulfoxide) 1 was prepared from hydrated RuCl_3 and methyl phenyl sulfoxide. A crystal structure determination revealed a linearly arranged molecule with three ruthenium atoms in distorted octahedral configurations with bridging chloro and S, O-mpso ligands. For the ruthenium metals with triply bridged chloro ligands, the Ru-Cl-Ru angles are 81.8 (4), 82.7(1) and 83.2 (1) deg, and the Ru...Ru non-bonded distance is 3.218 A. In contrast, the Ru-Cl-Ru angle on the bridging mpso part of the molecule is 100.7 (1) deg, and the Ru...Ru non-bonded distance is 3.686 A. the configuration at sulfur on S2, S4 and S5 is opposite to that at S1, S3 and S6. In solution, the methyl resonances in the ~1H and ~(13)C NMR spectra of 1 are found in the #delta# ranges 3.81-2.70 and 49.7-44.9, respectively. The methyl resonances of the S, O-bridging mpso ligands are shifted upfield in the ~1H NMR spectrum, but furthest downfield in the ~(13)C NMR spectrum.