2,2'-Bipyridyl as a Redox-Active Borylene Abstraction Agent

Siyuan Liu; Marc-André Légaré; Jens Seufert; Dominic Prieschl; Anna Rempel; Lukas Englert; Theresa Dellermann; Valerie Paprocki; Andreas Stoy; Holger Braunschweig

doi:10.1021/acs.inorgchem.0c01383

2,2'-Bipyridyl as a Redox-Active Borylene Abstraction Agent

Inorg Chem. 2020 Aug 3;59(15):10866-10873. doi: 10.1021/acs.inorgchem.0c01383. Epub 2020 Jul 16.

Authors

Siyuan Liu^{1

2}, Marc-André Légaré^{1

2}, Jens Seufert^{1

2}, Dominic Prieschl^{1

2}, Anna Rempel^{1

2}, Lukas Englert^{1

2}, Theresa Dellermann^{1

2}, Valerie Paprocki^{1

2}, Andreas Stoy^{1

2}, Holger Braunschweig^{1

2}

Affiliations

¹ Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
² Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.

PMID: 32672448
DOI: 10.1021/acs.inorgchem.0c01383

Abstract

2,2'-Bipyridyl is shown to spontaneously abstract a borylene fragment (R-B:) from various hypovalent boron compounds. This process is a redox reaction in which the bipyridine is reduced and becomes a dianionic substituent bound to boron through its two nitrogen atoms. Various transition metal-borylene complexes and diboranes, as a well as a diborene, take part in this reaction. In the latter case, our results show an intriguing example of the homolytic cleavage of a B═B double bond.