Since data with neat limonene have to be
interpreted, it is important not to use only one solvent that might
be an inappropriate substitute for limonene as solvent. So two
largely different solvents and two different basis sets were used and
the arithmetic mean for the calculated populations based on free
energies were determined for conformer 1, 2, and 3 as 28%, 38%,
and 34%, respectively. The standard deviations of the calculated
populations are 3%, 6%, and 3%, respectively, which fits nicely to
results from literature e.g. glucose [28]; endo-borneol [29]; cylohexene
oxides [30]. Interestingly, the calculated entropies are
highest for conformer 2 at all levels of theory (Table 2).