Abstract
1. By the action of tributyl borate on tricarbonyl(lithiocyclopentadienyl)manganese and -rhenium the corresponding boronic acids were prepared. 2. Some properties of these acids were studied. In an aqueous medium they are readily hydrolyzed with formation, respectively, of tricarbonylcyclopentadienylmanganese (TCM) and tricarbonyicyclopentadienylrhenium (TCR), and under given conditions the rate of hydrolysis of TCR-boronic acid is higher than the rate of hydrolysis of TCM-boronic acid. 3. The chloro and bromo derivatives of TCR and the already-known similar derivatives of TCM were prepared by the action of cupric halides on symmetrical mercury derivatives of TCM and TCR. 4. Bromo derivatives of TCM and TCR are inert in nucleophilic exchange reactions of halogen.
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