Organometallic Lewis Acids, Part LXI.([1]) Cationic Pentacarbonylrhenium Complexes [( OC)₅Re-L]⁺BF₄- with Aromatic Amines (L) as Ligands

Aromatic amines (aniline and derivatives) react with (OC)(5)ReFBF3 to give the cationic complexes [(OC)(5)Re-L](+) as BF4- salts under mild conditions and in high yields. Dinuclear, dicationic complexes are formed with o- and p-phenylenediamine. Substitution of tetrafluoroborate by the N-donors is preferred before attack at a carbonyl ligand.