Manganese complex borylene

Diboranes(4) and dihaloboranes are the traditional boron source for the synthesis of homodinudear bridging borylene compounds. Reaction of K[( 5-C5H4Me)Mn(CO)2H] with a variety of B2R2CI2 derivatives afforded the homodimetallic manganese compounds [(/x-BX) ( 5-C5R5)Mn(CO)2 2] (R = NR 2, fBu) (23a,b-26a,b), which represent the first series of structurally authenticated borylene complexes (Scheme 10) [45-47]. 

Scheme 10 Synthesis of bridging manganese borylene complexes...

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