Communication
Stepwise Oxygenation of Pinacolborane by a Rhodiumperoxo Complex: Detection of an Intermediate Metal Borate and Perborate†
Marcel Ahijado Salomon Dr.,
Thomas Braun Prof. Dr.,
Anna Penner Dipl.-Chem.,
Marcel Ahijado Salomon Dr.
Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin (Germany), Fax: (+49) 30-2093-6939
Search for more papers by this authorThomas Braun Prof. Dr.
Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin (Germany), Fax: (+49) 30-2093-6939
Search for more papers by this authorAnna Penner Dipl.-Chem.
Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin (Germany), Fax: (+49) 30-2093-6939
Search for more papers by this authorMarcel Ahijado Salomon Dr.,
Thomas Braun Prof. Dr.,
Anna Penner Dipl.-Chem.,
Marcel Ahijado Salomon Dr.
Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin (Germany), Fax: (+49) 30-2093-6939
Search for more papers by this authorThomas Braun Prof. Dr.
Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin (Germany), Fax: (+49) 30-2093-6939
Search for more papers by this authorAnna Penner Dipl.-Chem.
Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin (Germany), Fax: (+49) 30-2093-6939
Search for more papers by this author†
We would like to acknowledge the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie for financial support.
Graphical Abstract
Acting as go-between: A rhodium borate and perborate have been identified as intermediates in the rhodium-mediated oxygenation of pinacolborane (HBpin; see scheme). The rhodium(III)–peroxo complex reacts with the Lewis acidic boron compound HBpin by oxygen transfer from the rhodium center to HBpin to give a rhodium(I) species. The reaction sequence might play a crucial role in the homocoupling of boronic acid.
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