Synthesis of Manganese and Rhenium Half-Sandwich Complexes with Cp-Phosphaferrocene Ligands

Abstract

The phosphaferrocene-substituted Cp anion 1 has been used to prepare the tricarbonyl half-sandwich complexes 1·M(CO)3 (2, M = Mn; 3, M = Re), which release one CO ligand upon irradiation and transform to the respective dicarbonyl complexes 4 and 5 with the phosphaferrocene donor group coordinated in an intramolecular chelating manner. Due to the chirality of the phosphaferrocene moiety, subsequent photolytic substitution of a further CO ligand in the manganese complex 4 by a PPh3 leads to a 11:1 mixture of diastereomers of the monocarbonyl complex 6.