Preparation and characterization of the square-based pyramidal cluster anion 4-COH)>

Article abstract of DOI:10.1016/0022-328X(94)05309-Y

The new compound 4-COH)>, <1>, (PPN = bis(triphenylphosphine) iminium) is a product in several cluster expansion reactions which use triruthenaboranes as precursors, although the yields are not high.An X-ray diffraction study has shown that in the anion 1 has a square-based pyramidal framework of ruthenium atoms.With the square face capped by a μ₄-COH group.Studies of the reactivity of 1 have been carried out, but have not shown 1 to be a ready precursor to an Ru5C-carbido species as had been expected.Keywords: Ruthenium; Carbonyl; Cluster; Crystal structure