Abstract
The synthesis and the first structural characterization of the halogenated pyridinium salts [C(5) F(5) NH](+) , [C(5) F(4) ClNH](+) , [(C(5) F(5) N)(2) H](+) , [(C(5) Cl(5) N)(2) H](+) of the weakly coordinating anion (WCA) [Al(OTeF(5) )(4) ](-) , showing noncovalent interactions in the solid state, are presented. The salts were characterized by the multinuclear NMR and IR spectroscopy as well as X-ray diffraction. Hirshfeld surface analysis and solid state structures reveal various intermolecular anion-π and σ-hole interactions between the corresponding halogenated pyridinium cations and the anion [Al(OTeF(5) )(4) ](-) .