A boroxine-supported triosmium oxymethylidyne cluster system, [(µ-H) 3 (CO) 9 Os 3 CO] 3 (B 3 O 3 ): its structure and its conversion into halogeno- and phenyl-methylidyne complexes

From the hydroboration of the unsaturated cluster (µ-H)2Os3(CO)10 in the presence of tetrahydrofuran, a cluster system was prepared with boroxine (B3O3) supporting three triosmium units, which was shown to be a useful starting material in the synthesis of the triosmium methylidyne clusters, (µ-H)3(CO)9Os3(CCl), (µ-H)3(CO)9Os3(CBr), and (µ-H)3(CO)9Os3(CPh).