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. Author manuscript; available in PMC: 2013 Jun 1.

Published in final edited form as: J Org Chem. 2012 May 11;77(11):4939–4948. doi: 10.1021/jo300314z

Optimized geometries of conrotatory (left) and non-pericyclic (right) ring opening of cyclobutene potassium alkoxide 5b. B3LYP/6-31G(d) selected bond distances (Å), angles, and dihedral angles are shown. LANL2DZ was used for potassium.

Optimized geometries of conrotatory (left) and non-pericyclic (right) ring opening of cyclobutene potassium alkoxide 5b. B3LYP/6-31G(d) selected bond distances (Å), angles, and dihedral angles are shown. LANL2DZ was used for potassium.