Direct evidence for N→B π-donation into a polyhedral borane cluster
Abstract
The nitrogen atom of [1-(η5-C5Me5)-4-(NEt2)isocloso-1-RhB10H9] is planar, the N(4)–B(4) bond is short, and there is restricted rotation about this bond (ΔG‡272ca. 54kJ mol–1), all implying significant N→B π-donation into the cluster.