Tasks Performed by Spartan'06 Essential Edition for Macintosh:
   
  Energy Determine total energy (Hartree-Fock), heat of formation (Semi-Empirical) or strain energy (Molecular Mechanics).
     
  Equilibrium Geometry Determines local energy minimum.
     
  Transition State Geometry Determines transition-state geometry.
     
  Calculate and Plot IR Spectra IR Spectra available for all methods, also used to establish validity of transition states.
     
  Conformational Analysis Search conformation space to determine either lowest-energy conformer or diverse set of low-energy conformers.
     
  Energy Profile Define and calculated energies for user specified geometrical coordinates. Useful to locate a transition state along a reaction coordinate and to analyze conformational energy changes. Includes the ability to provide grid scanning to concurrently drive two geometric coordinates.