[jnimagine]

What's an energy barrir to rotation?
I have data on the enrgy at anti and gauche conformations of 1-iodopropane.
I have also graphed the data (steric energy vs dihedral angle) 
from the graph, do I just subtract the trough at anti from the trough at gauche?  What about for gauche to gauche?  since the energies are the same at the two gauche conformations, would it be 0??

[sjb]

Consider the notes at http://www.chemicalforums.com/index.php?topic=29206 (why not continue in that post?)