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. Author manuscript; available in PMC: 2008 Oct 6.
Published in final edited form as: J Am Chem Soc. 2007 Jun 5;129(25):7915–7923. doi: 10.1021/ja0709674

Figure 5.

Figure 5

Transition structures for the 5-exo and 6-endo cyclization modes of bicyclo[4.1.0] epoxonium ion for the cis- and trans-methoxy isomers. The energies are given in kcal/mol and the distances are given in Å.