Аннотация:This chapter describes recent progress in the chemistry of polyhedral boranes and carboranes. For carboranes, the main emphasis was placed on the most rapidly developing areas of research, including medicinal chemistry, luminescence materials, weakly coordinating anions and especially functional group assisted BH-activation of carboranes catalyzed by transition metals. An exhaustive review of the literature on derivatives of polyhedral boranes since the publication of the latest fundamental reviews in this area is presented.