Fig. 1: Traditional chemistry of transition-metal carbonyls with nucleophiles and main-group metallomimetic analogues based on boron.
From: A step-for-step main-group replica of the Fischer carbene synthesis at a borylene carbonyl
a Fischer carbene synthesis and a variant thereof. Strong nucleophiles generally attack TM carbonyls at the carbon atom of a carbonyl ligand, leading to TM acylate complexes, which, when treated a cationic electrophile, provide either a Fischer carbene complex or a TM acyl complex, depending on a range of factors. b Fischer carbene synthesis at boron. The Fischer carbene synthesis can by replicated with metallomimetic borylene carbonyls, leading to bora-Fischer carbenes or acylborane Lewis adducts, main-group analogues of the traditional TM counterparts.
