CH2F2, a polar molecule
One or the other colleague has pondered, that the
Kimball model, if at all usable for any purpose, would certainly not be
able to compute polar molecules. This remark was a reaction to our demonstration,
that it could easily predict the heat of formation at zero Kelvin for all
n-alkanes (tested to C140H282) to better than one kcal/mol when calibrated
at methane and ethane.
This is the reason why so many of the samples
given in the table are polar, or even very polar molecules.
Here is difluoromethane: