Synthesis and structure of 1-iodo-7-dioxonium-decahydro-closo-dodecaborate

Reaction of [B12H11I]2− with 1,4-dioxane in presence of HBF4 resulted in 1-iodo-7-(tetramethylene-(3-oxa)-oxonium)-decahydro-closo-dodecaborate regioselectively with good yield. Its structure, especially 1,7-isomery, was definitely proved by NMR and XRD methods. This novel compound has two reactive centers, perspective either for nucleophlic cleavage of dioxonium ring and/or for substitution of iodine in various cross-coupling reactions.