Effect of Electron Correlation on Populations

Hartree-Fock (RHF), MP2, and Cl-singles doubles (CISD) levels. The differences in the populations for single-bonded molecules is less than 0.06e. 

Comparisons of Population Analysis of Small Organic Compounds 

The chemical literature is rife with examples and applications of population analysis used to understand the nature of bonding in different molecules. We present here a few topics that are of recent notoriety. 

On the other hand, the topological populations for alkanes predict a reversed polarity — H. Wiberg and Wendoloski favored this polarity 

Ritchie and Bachrach have examined the relative acidity of strained and unstrained hydrocarbons. The topological population of hydrogen correlates very well with the deprotonation energy of a series of hydrocarbons, better than the C—H distance or the value of the electron density at the C—H bond critical point (Table 13). 

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