Bifunctional Cyclopentadienyl Ligands in Organotransition Metal Chemistry

Abstract

Listen

Translate article

Abstract The coordination chemistry of cyclopentadienyl ligands that contain an additional coordination site appended to the ring-periphery by a covalent bridge Z, C5R4−Z-X or C5R4−Z-L, is outlined. When transition metals are coordinated both to the cyclopentadienyl group C5R4 and the pendent donor site X or L (X = CH2 NR′, O; L = HC[dbnd]CH2 NR2′, PR2′, OR′, SR′), the resulting complexes possess distinct properties due to the chelate effect. In such complexes the coordination sphere is defined by the nature of the bridge Z and the coordinating groups X and L and a series of metallacyclic complexes becomes available of which the chemistry is different from that of their non-bridged analogs.