Increase in Strain Energy on Going from [4.4.4.5]Fenestrane to [4.4.4.4]Fenestrane A Method for Estimating the Heats of Formation of Hydrocarbons and their Derivatives from ab Initio Energies

Our interest in fenestranes led us to wonder how large the change in strain energy with changes in the ring size might be. This led us to consider if satisfactory estimates of heat of formation cou...