Abstract
Transition metals catalyse a variety of organic reactions, of which the ring opening of strained ring organic molecules generated a lot of interest. Theoreticians predicted a metal orbital catalysed pathway, which involved concerted bond breaking and bond forming. On the other hand experimentalists were able to show that the reaction was not proceeding through a concerted pathway by intercepting the intermediates involved. There remained, however, two ring systems methylenecyclopropanes and cyclobutenes—whose reactions with metal complexes seemed to be of a concerted nature. An analysis of the reactions of different metal complexes with these ring systems and the theoretical predictions provide a rationale for understanding these reactions.
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Samuelson, A.G. Role of orbital symmetry in transition metal promoted ring opening reactions of methylenecyclopropanes and cyclobutenes. Proc. Indian Acad. Sci. (Chem. Sci.) 93, 729–739 (1984). https://doi.org/10.1007/BF02863289
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DOI: https://doi.org/10.1007/BF02863289