PREPOT has been called for IHI potential surface B 
    LEPS functional form

    Potential energy surface parameters:
    Bond                                      I-H        H-I        I-I
    Dissociation energies (kcal/mol):        73.80000   73.80000   35.90000
    Equilibrium bond lengths (Angstroms):     1.60000    1.60000    2.67000
    Morse beta parameters (Angstroms**-1):    1.75000    1.75000    1.86000
    Sato parameters:                          0.20000    0.20000    0.12500



  P. J. Kuntz, E. M. Nemeth, J. C. Polanyi,                                  
  S. D. Rosner, C. E. Young,                                                 
  J. Chem. Phys. 44, 1168(1966)                                              
                                                                             
                                                                             


   MAX. AND ACTUAL NO. OF EXCITED SURFACES:   0       0
   MAX. AND ACTUAL ORDER OF DERIVATIVES:      1       1

  The potential routine in POTLIB assumes a
  default labeling of the atoms.  The user has
  made the following selection of atomic labels:

               DEFAULT                         USER-SELECTED

  Atom  1 is       I                                   I 
  Atom  2 is       H                                   H 
  Atom  3 is       I                                   I 


  Atom  1  I  is a member of Reactant #1
  Atom  2  H  is a member of Reactant #2
  Atom  3  I  is a member of Reactant #2

  The Potential Energy is Zero for the following
  geometric arrangement:  The reactants are at
  their equilibrium geometries, widely separated.


  Reactant #1
  I 

  Reactant #2
  H I 

  The default units are:
     BOHR FOR DISTANCE
     HARTREE FOR ENERGY


  The user has chosen units :
     BOHR                 FOR DISTANCE
     HARTREE              FOR ENERGY


  To reset the zero-of-energy, assign a
  non-zero value to the variable ANUZERO.
  The value of ANUZERO will be SUBTRACTED from
  the energy calculated by this routine.

  GS Energy         2.92997538597648

  Derivative          2.68443867676    -2.44844031149     0.00000000000
  Derivative          1.88870841352     0.76354083786     0.00000000000
  Derivative         -4.57314709028     1.68489947363     0.00000000000