The MINDO3 keyword requests a semi-empirical calculation using the MINDO3 Hamiltonian [Bingham75, Dewar77] method. No basis set keyword should be specified.
Energies, “analytic” gradients, and numerical frequencies. Restricted open-shell (RO) wavefunctions are limited to optimizations using the Fletcher-Powell and pseudo-Newton-Raphson methods (the FP and EnOnly options to Opt, respectively).
The MINDO3 energy appears in the output file as follows:
SCF Done: E(UMINDO3) = -8.08016620373 A.U. after 11 cycles
The energy is as defined by the MINDO3 model.
