Get access

Reaction of 13-Vertex Carboranes with Nucleophiles: Unprecedented Cage-Carbon Extrusion and Formation of Monocarba-closo-dodecaborate Anions

Authors


  • This work was supported by grants from the Research Grants Council of the Hong Kong Special Administration Region (Project No. 403906) and The Chinese University of Hong Kong.

Abstract

original image

In contrast to icosahedral carboranes, instead of deboration, 13-vertex carboranes undergo cage-carbon extrusion and cluster contraction to give icosahedral monocarborane anions on reaction with nucleophiles. In the proposed mechanism, nucleophilic attack on a cage carbon atom cleaves the Ccage[BOND]Ccage bond, new Ccage[BOND]B bonds form to preserve cluster integrity, and hydrogen migration generates the final icosahedral product (see scheme).

Ancillary