Reaction of Organolithium Reagents with Cyclorhenated and Cyclomanganated (η<b><sup>6</sup></b>-Arene)tricarbonylchromium Complexes: Structural Characterization of a New Benzoylrhenate Intermediate and Selective Ortho-Acetylation of (η<sup>6</sup>-Arene)tricarbonylchromium Complexes
tetracarbonyl[3-methyl-2-(η6-phenyl)tricarbonylchromium(0)}pyridine]rhenium(I) yields the air-stable (exo-benzoyl)(tricarbonyl)[3-methyl-2-(η6-phenyl)tricarbonylchromium(0)-κC2‘}pyridine-κN]rhenate(I) that has been isolated and characterized by X-ray diffraction analysis and other spectroscopic methods. A similar treatment applied to cyclomanganated (η6-arene)Cr(CO)3 analogues with a nucleophile