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. 2017 Feb 8;139(5):1802-1805.
doi: 10.1021/jacs.6b13047. Epub 2017 Jan 26.

Main-Group Metallomimetics: Transition Metal-like Photolytic CO Substitution at Boron

Holger Braunschweig  1   2 , Ivo Krummenacher  1   2 , Marc-André Légaré  1   2 , Alexander Matler  1   2 , Krzysztof Radacki  1   2 , Qing Ye  1   2
Affiliations

Main-Group Metallomimetics: Transition Metal-like Photolytic CO Substitution at Boron

Holger Braunschweig et al. J Am Chem Soc. .

Abstract

The carbon monoxide adduct of an unhindered and highly reactive CAAC-bound arylborylene, [(CAAC)B(CO)Ar] (CAAC = cyclic (alkyl) (amino)carbene), has been prepared using a transfer reaction from the linear iron borylene complex [(PMe3) (CO)3Fe=BAr]. [(CAAC)B(CO)Ar] is a source of the dicoordinate [(CAAC)ArB:] borylene that can be liberated by selective photolytic CO extrusion and that, although highly reactive, is sufficiently long-lived to react intermolecularly. Through trapping of the borylene generated in this manner, we present, among others, the first metal-free borylene(I) species containing a nitrogen-based donor, as well as a new boron-containing radical.

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