10.1016/S0022-328X(00)98506-1
The research investigates the photochemical reactions of RMn(CO)5 complexes (where R = H, C6H5, CH2C6H5) with 1,3-butadiene and 1,3-pentadiene. The study explores how these dienes insert into the Mn-C bonds, forming various Mn(CO)3(η2-enyl) complexes. Key chemicals involved include HMn(CO)5, C6H5Mn(CO)5, and C6H5CH2Mn(CO)5 as starting materials, along with 1,3-butadiene and 1,3-pentadiene as diene reactants. The reactions are induced by irradiation at 253 K, and the resulting complexes are characterized using IR and NMR spectroscopy, as well as elemental analysis. The study also examines the stabilization of enyl ligands through substitution with donor ligands like P(CH3)3 and As(CH3)3, which allows for the isolation and characterization of different isomers of the Mn(CO)3(η2-enyl) complexes. The research provides insights into the stereochemistry and configurations of these complexes, highlighting the role of different substituents and donor ligands in influencing the stability and structure of the enyl ligands.