Results of approbation of a new quantum mechanical approach of lone pairs (LPs) visualization, its optimization and testing on a range of model molecules are presented. The main idea of proposed methodology is using 3He atom as a probe for investigating electronic shells of species with LPs. As model objects, we consider “classical” examples of hydrogen cyanide, methanimine, ammonia, phosphine, formaldehyde, water, and hydrogen sulfide. It is shown that LPs can be visualized by means of 3D maps of Laplacian of 3He chemical shift ∇2δHe. NMR calculations could be performed using level of theory as low as B3LYP/6-31G, allowing for the reduction of computational time without significant loss of quality. Advantages of our approach are discussed in comparison with usual methods of lone pairs visualization (electron localization function, molecular electrostatic potential).

Original languageEnglish
Pages (from-to)1194-1199
Number of pages6
JournalJournal of Computational Chemistry
Issue number12
Publication statusPublished - 5 May 2020

Scopus subject areas

  • Chemistry(all)
  • Computational Mathematics

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