Synthesis of 9,9′-Bis(m-Carboranyl) upon Catalytic Decomposition of 9,9′-Bis(m-Carboranyl) Mercury under Influence of (PPh3)3 RhCl

Abstract A simple method is reported for the synthesis of 9,9-bis(m-carboranyl) from 9,9′-bis (m-carboranyl) mercury upon its decomposition under the influence of catalytic amounts of (PPh3)3RhCl in HMPA. Under these conditions, 9-m-carboranylmercury chloride easily forms 9-chloro-m-carborana and metallic mercury. A simple method for symmetrization of 9-o- and 9-m-carooranylmercury chloride into 9,9′-bis(o- and m-carboranyl)mercury under influence of sodium stannite in an alkaline medium was elaborated.