Synthesis, Structure, and Reactivity of Acid‐Free Neutral Oxoborane. Issue 35 (24th June 2021)

• Record Type: Journal Article
• Authors: Wang, Hanqiang; Zhang, Jie; Yang, Jingting; Xie, Zuowei
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 35(2021)
• Page Start: 19008
• Page End: 19012
• Publication Date: 2021-06-24
• Subjects: boriranes -- carboranes -- oxoboranes -- oxophosphanes -- silanones; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202106069
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: An efficient synthesis of an acid‐free neutral oxoborane of the type carboranyl‐B(carbene)=O has been developed via a serendipitous discovery from the reaction of 1, 2‐[BBr(carbene)]‐o‐carborane with AgOTf. This represents a new type of oxoborane. The stabilization of this oxoborane may be attributed to 1) kinetic stabilization provided by a bulky 3D carboranyl ligand and 2) thermodynamic stabilization offered by a carbene ligand. Crystallographic analyses support the presence of the shortest terminal B=O double bond ever reported thus far. Its reactivity has also been examined. Abstract : A new type of acid‐free neutral oxoborane has been prepared via a serendipitous discovery, from the reaction of 1, 2‐[BBr(carbene)]‐ o ‐carborane with AgOTf in which the shortest B=O distance observed so far has been measured, as confirmed by single‐crystal X‐ray analyses.