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Issue 14, 2020
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Anion templated crystal engineering of halogen bonding tripodal tris(halopyridinium) compounds

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Abstract

In this work four new tripodal tris(halopyridinium) receptors containing potentially halogen bonding groups were prepared. The ability of the receptors to bind anions in competitive CD3CN/d6-DMSO was studied using 1H NMR titration experiments, which revealed that the receptors bind chloride anions more strongly than more basic acetate or other halide ions. The solid state self-assembly of the tripodal receptors with halide anions was investigated by X-ray crystallography. The nature of the structures was dependent on the choice of halide anion, as well as the crystallisation solvent. Halogen bond lengths as short as 80% of the sum of the van der Waals radii were observed, which is shorter than any halogen bonds involving halopyridinium receptors in the Cambridge Structural Database.

Graphical abstract: Anion templated crystal engineering of halogen bonding tripodal tris(halopyridinium) compounds

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Article information


Submitted
18 Feb 2020
Accepted
08 Mar 2020
First published
24 Mar 2020

CrystEngComm, 2020,22, 2526-2536
Article type
Paper

Anion templated crystal engineering of halogen bonding tripodal tris(halopyridinium) compounds

É. M. Foyle and N. G. White, CrystEngComm, 2020, 22, 2526 DOI: 10.1039/D0CE00241K

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