This overlap-based BJ damping function retains the parameter-free philosophy of EFP but is trivially extensible to odd powers of R without resorting to augmentations that render the function unbound on the interval [0, 1]. Table summarizes the damping functions introduced above. A successful damping function must prevent E disp from diverging as R → 0, regardless of the fine details of how it performs otherwise. This limit provides a useful first assessment of the validity of any damping function, and Table reports the the limiting value lim R→0 (-f 6 /R 6 ) for each damping function. The original EFP damping function yields a finite, negative value for this limit. As such, while this function does successfully prevent divergence of the dispersion energy, it is not truly a Gaussian analogue of the TT damping function because the latter damps the dispersion energy to zero at R = 0. 52 Failure to satisfy this limit is not fatal to the use of damped EFP dispersion, but it does exemplify the errors associated with early truncation of the original Tang-Toennies expression. The revision suggested in Eq. ( ) restores the proper limit, namely, lim R→0 (-f 6 /R 6 ) = 0.