Single‐Crystal X‐ray Diffraction and Solution Studies of Anion–π Interactions in <i>N</i>‐(Pentafluorobenzyl)pyridinium Salts

Abstract

Abstract A solid‐state structural study on anion–π interaction in various N ‐(pentafluorobenzyl)pyridinium salts accompanied by NMR spectroscopic investigations is presented. The crystal structures of 1a – 1d reveal different kinds of contacts with anions, including anion–π interactions. In particular, the solid‐state structure of 1b ‐I 3 shows distinct evidence of anion–π interactions. Attempts to study anion–π interactions in solution were not successful, but their presence in solution could not be ruled out.