Facile pathway-defined fluxional cluster isomerization in ten-vertex closo-2,1,6-metalladicarbaboranes of ruthenium and rhodium
Abstract
Multi-element n.m.r. spectroscopy allied with deuterium labelling and single-crystal X-ray diffraction analysis revels fluxionality within [2-(η6-C6Me6)-closo-2,1,6-RuC2B7H9] and [2-(η5-C5Me5)-closo-2,1,6-RhC2B7H9] that results in enantiomeric exchange (between the 2,1,6 and 2,1,9 forms)via defined diamond–square–diamond pathways.