Understanding the effect of substitution on the formation of S..F chalcogen bond

Rahul Shukla, Deepak Chopra

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In this study, we have investigated the effect of substitution on the formation of S …F non-covalent interactions in XHS …FCH3 complexes (X =-H, -F, -Cl, -OH, -OCH3, -NH2, -NHCH3, -NO2, -CN) at MP2/aug-cc-pVDZ level of theory. The formation of S …F chalcogen bonds was observed in all the cases, except for X = -H. The binding energy of the S …F non-covalent interactions is strongly dependent on the nature of the substituent groups. The energy decomposition analysis revealed that electrostatic and exchange energy component are the dominant contributors towards the stability of these interactions. The topological analysis established the presence of the S …F chalcogen bond due to the presence of a bond critical point exclusively between sulphur and fluorine atoms representing a closed-shell interaction. The natural bond orbital analysis shows that the stability of the interaction comes from a charge transfer from F(lp) to s*(S-X) orbital transition. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)1589-1596
Number of pages8
JournalJournal of Chemical Sciences
Volume128
Issue number10
DOIs
StatePublished - 1 Oct 2016
Externally publishedYes

Keywords

  • NBO
  • Non-covalent interactions
  • binding energies
  • chalcogen bonds
  • energy decomposition
  • topology

ASJC Scopus subject areas

  • General Chemistry

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