Cis labilization of ligand dissociation. 3. Survey of group 6 and 7 six-coordinate carbonyl compounds. The site preference model for ligand labilization effects by Jim D. Atwood and Theodore L. Brown (1976, 10.1021/ja00427a017)

Journal of the American Chemical Society 98, 3160–3166. The introduction distinguishes isotope-exchange evidence from substitution-product geometry and discusses rearrangement of five-coordinate intermediates.