Notes about the Truhlar family
---------------------------------

This family is the 'calendar' basis sets - apr, may, jun, and jul. These
are formed by progressively removing diffuse functions from 'aug-cc-pV(X+d)Z' basis
sets to form earlier and earlier 'months'.

The naming of this series of basis sets comes from the fact that the cc-pV*Z basis
sets with added polarization functions are known as the Aug-cc-pVZ.
They are constructed by removing diffuse functions from the Aug basis sets.
For example, the Jul-cc-pVZ basis sets remove the diffuse function from H and He
from Aug-cc-pVZ. Jun-cc-pVZ also removes the highest angular momentum diffuse function
from all other atoms, May-cc-pVZ removes the two highest angular momentum functions,
and Apr-cc-pVZ removes the three highest angular momentum functions.
By default, at least s and p diffuse functions are always included in these basis sets.
This serves to avoid some inherent inconsistencies, but it differs from Truhlar and
coworkers' original definitions.


Curator Notes
-------------

BPP: Note that the base cc-pV(X+d)Z basis sets aren't exactly the same as the other
cc-pV(X+d)Z basis sets stored in the BSE. They have undergone optmization,
similar to the 'optimize general contraction' option. Therefore, these different
bases are stored in the 'base' subdir in the truhlar subdir.
