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2.4.6 Method 6: Synthesis of Tricarbonylmetal–Arene Complexes by Side-Chain Modification

DOI: 10.1055/sos-SD-002-00214

Kündig, E. P.; Pache, S. H.Science of Synthesis, (20032172.

Side-chain functionalization in π-complexed arenes has been developed to date only in (arene)tricarbonylchromium complexes. The tricarbonylchromium fragment stabilizes both cationic and anionic benzylic intermediates;[‌137‌] being bulky, it also efficiently blocks one face of the arene and adjacent positions. All these effects have been used extensively.[‌138‌]