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Updated: Feb 23, 2026
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Halogen bonding in hypervalent iodine and bromine derivatives: halonium salts
Gabriella Cavallo1, Jane S Murray2, Peter Politzer2
1NFMLab, Department of Chemistry, Materials and Chemical Engineering 'Giulio Natta', via Mancinelli 7, Milan I-20131, Italy.
Abstract:
Halogen bonds have been identified in a series of ionic compounds involving bromonium and iodonium cations and several different anions, some also containing hypervalent atoms. The hypervalent bromine and iodine atoms in the examined compounds are found to have positive σ-holes on the extensions of their covalent bonds, while the hypervalent atoms in the anions have negative σ-holes. The positive σ-holes on the halogens of the studied halonium salts determine the linearity of the short contacts between the halogen and neutral or anionic electron donors, as usual in halogen bonds.
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