1.   Hence, molecular associations that give rise to large exothermicities are also associated with large adverse entropy changes, and the two effects work in a compensatory manner.

2.   Thus smaller stacking exothermicities are associated with much less adverse entropy changes in forming the single-stranded helix.

3.   Here we are concerned with bimolecular associations where adverse entropy changes denote loss of translational and rotational motions that occur when two entities come together to form one complex.

4.   No internal rotors are restricted in the stacked dimer, but again we see that large adverse entropies of stacking are associated with larger stacking exothermicities.

5.   On the basis of the experimental data it must also be concluded that the adverse entropy contribution to poly from U-U stacking is relatively small.