Mc. Barral et al., SYNTHESIS AND X-RAY STRUCTURE OF THE 1ST NONPOLYMERIC CHLOROTETRAKIS(CARBOXYLATO)-DIRUTHENIUM(II,III) COMPOUND, Inorganic chemistry, 33(12), 1994, pp. 2692-2694
The compound Ru2Cl(mu-O2CC4H4N)4(thf).thf.H2O was prepared by reaction
of Ru2Cl(mu-O2CCH3)4 with pyrrole-2-carboxylic acid in methanol/water
and recrystallization from thf/petroleum ether. The crystal structure
shows two ruthenium atoms linked by four bridging pyrrole-2-carboxyla
te ligands; the axial ligands are a chlorine atom and a thf molecule.
The nonpolymer nature of this compound contrasts with the polymeric na
ture of all chlorotetrakis-(carboxylato)diruthenium(II,III) complexes
described.