The Shannon entropies along the intrinsic reaction coordinates (IRC) of two
S(N)2 reactions were calculated at the RHF/6-31++G** level. The resulting
entropic profiles were compared with the corresponding energy profiles. The
Shannon entropy profiles in position and momentum space, as well as their
sum, show interesting features about the bond forming and breaking process
that are not apparent from the conventional reaction energy profile. (C) 20
00 John Wiley & Sons, inc.