CNDO/2

< CNDO

Complete Neglect of Differential Overlap (CNDO) is one of the first semi empirical methods in quantum chemistry. It uses the frozen core approximation, in which only the outer valence electrons are explicitly included, and the approximation of zero-differential overlap.

CNDO/2 is the main version of CNDO. The method was first introduced by John Pople and collaborators.

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