π-Complexed polyfluoroarenes: a reactivity, bonding and spectroscopic study of (η 6 -C 6 F 6 )Cr(η 6 -C 6 H 6 ) and related molecules

The syntheses, structures and reactivity of fluorinated di-arene chromium sandwich complexes (chromarenes) are reviewed, and their bonding characteristics probed by an analysis of their spectroscopic properties. In particular, density functional theory, together with a detailed vibrational study of (C6F6)Cr(C6H6), has been used to study a system containing the very rare hexahapto-coordinated hexafluorobenzene ligand. The structural, reactivity …