51. Anion Recognition with Antimony(III) and Bismuth(III) Triaryl-Based Pnictogen Bonding Receptors.
- Author
-
Kuhn H, Docker A, and Beer PD
- Subjects
- Chlorides, Anions chemistry, Halogens chemistry, Triazoles chemistry, Solvents, Antimony chemistry, Bismuth chemistry
- Abstract
The synthesis and characterisation of a library of acyclic antimony(III) and bismuth(III) triaryl pnictogen bonding (PnB) receptor systems are reported. In the first-generation receptor series, quantitative
1 H NMR chloride titration experiments in THF solvent media reveal halide anion binding potency is intimately correlated with both the electronic-withdrawing nature of the aryl- substituent and the polarisability of the PnB donor. Further extensive anion binding investigations with the most potent Sb- and Bi-based PnB receptors: 1⋅Sb2CF3 and 1⋅Bi2CF3 , reveal novel selectivity profiles, both displaying Cl- selectivity relative to the heavier halides and, impressively, to a range of highly basic oxoanions. The synthesis and preliminary chloride anion binding studies of a series of novel tripodal tris-proto-triazole triaryl Sb(III) and Bi(III) mixed PnB-HB receptor systems are also described. Whereas parent triphenyl Sb(III) and Bi(III) compounds are incapable of binding Cl- in THF solvent media, the PnB-triazole HB host systems exhibit notable halide affinity., (© 2022 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.)- Published
- 2022
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