SYNTHESIS AND MOLECULAR-STRUCTURE OF AN EXO-BICYCLIC 11-VERTEX CLOSO-RUTHENABORANE [(PPH3)(C6H5COS)(2)RUB10H8]CENTER-DOT(CH2CL2)

The title compound has been separated in ca 13% yield from the reactio n of closo-[B10H10](2-), [(PPh3)(3)RuCl2] and C6H5COSH in CH2Cl2 solut ion, and characterized by elemental analysis, infrared spectroscopy, H -1 NMR and P-31 NMR spectroscopy and single-crystal X-ray diffraction analysis. The molecular structure is based on an eleven-vertex closo-t ype C-2V {RuB10} cluster-geometry with the ruthenium atom occupying th e unique six-connected apical position. The metal center has three exo polyhedral ligands, one triphenylphosphine and two dative thiobenzoate sulfur atoms. The carbonyl oxygen atoms of two thiobenzoxy are additi onally bonded to B2 and B3 atoms respectively, resulting in two exocyc lic five-membered Ru-S-C-O-B rings. (C) 1998 Elsevier Science Ltd. All rights reserved.