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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

Table 2.

Summary of computed enthalpies, ΔH, for the more complex alkoxide and potassium alkoxide guanacastepene precursors.

Gas Phase
THF
d
e
f
B3LYP/6-31G(d) M06-2X B3LYP/6-31G(d) B3LYP/6-31G(d)
5 0.0 0.0 0.0 0.0
6 10.9 13.4 18.7 17.4
6′ 11.3 15.5 10.7 13.7
7 0.9 1.9 9.2 -
7′ −32.1 −30.5 −22.3 -
8 2.7 4.0 9.9 -