Direct synthesis of dicarbollides†
Abstract
A direct dicarbon insertion into nine-vertex arachno cages resulting in the formation of C-substituted dicarbollides [7,8-R2-nido-7,8-C2B9H10]− Et3NH+via reactions between 4-Et3N-arachno-B9H13 and alkynes in refluxing toluene (yields 65–85%) is reported.