Abstract

We illustrate here an efficient approach to the implementation of configuration interaction (CI) methodologies in the case of general purpose semiempirical Hamiltonians such as MINDO/3, MNDO, PM3, AM1, and SAM1. The strategy described here has been implemented in the commercial program AMPAC and successfully blends well-known and tested algorithms. The primary purpose is to derive a reliable method for determining a CI solution with minimal user input. The success and intrinsic accuracy of the approach is discussed.

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