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Path E transition states: a) cis-chair TS, relative energy = 0.2 kcalmol−1; b) trans-chair TS, relative energy = 3.3 kcalmol−1; c) cis-boat TS, relative energy = 0 kcalmol−1; d) trans-boat TS, relative energy = 4.9 kcalmol−1. C(1) = internal carbon, C(2) = terminal carbon.
