The present article deals with the numerical details important for a succes
sful implementation of the equilibrial path tracing procedure EQUIPATH. The
results of an application to the RHF/6-31G(d) potential energy surface of
butane are reported and discussed. Sixteen saddle points and several valley
-ridge inflection points have been located. For the fragmentation C4H10 -->
C2H6 + C2H4 two different reaction paths have been found. (C) 2001 John Wi
ley & Sons, Inc.