Equilibria between tri-ruthenium(carbonyl) clusters with face- and edge-bridging pentalene ligands: crystal and molecular structures of two isomers of [Ru3(CO)8{1,3,5-(Me3Si)3C8H3}]
Abstract
The i.r. and 1H n.m.r. spectra of pentalene [C8H6, 2-RC8H5(R = SiMe3, Me, Ph), and 1,3,5-(Me3Si)3-C8H3] complexes of the Ru3(CO)8 cluster reveal the existence of equilibria between isomers; X-ray diffraction studies of the two forms of [Ru3(CO)8{1,3,5-(Me3Si)3-C8H3}] show that this involves the pentalene ligand in an edge- or face-bridging configuration with respect to the tri-ruthenium cluster.