Phosphine‐Stabilized Borylenes and Boryl Anions as Ligands? Redox Reactivity in Boron‐Based Pincer Complexes. Issue 46 (14th October 2016)

• Record Type: Journal Article
• Authors: Vondung, Lisa; Frank, Nicolas; Fritz, Maximilian; Alig, Lukas; Langer, Robert
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 46(2016)
• Page Start: 14450
• Page End: 14454
• Publication Date: 2016-10-14
• Subjects: boron -- density functional theory -- iron -- pincer ligands -- reduction; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201605838
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Stabilized borylenes (L2 BH:) with weakly π‐accepting substituents L, such as phosphines, were previously believed to be unstable. In the current manuscript, we describe a series of complexes formally containing a phosphine‐stabilized borylene or boryl anion. In contrast to common trivalent boron compounds, the boron‐based ligands in this study act as electron‐donating ligands. The reported iron hydride complexes exhibit a unique reactivity pattern, undergoing a reversible B−H reductive elimination concomitant with oxidation of the boron(I) center. Abstract : As a free molecule, a phosphine‐stabilized borylene is unstable, but it was isolated as an electron‐donating ligand in an iron complex. This complex exhibits a unique reactivity pattern, undergoing a reversible B−H reductive elimination concomitant with oxidation of the boron(I) center.