A detailed (1)H-NMR study of the anion binding properties of the 2-iodo-imidazolium receptor 1 in DMSO allows to fully attribute the observed affinities to strong charge-assisted C-IX(-) halogen bonding (XB). Stronger binding was observed for oxoanions over halides. Phosphate, in particular, binds to 1 with an association constant of ca. 10(3) M(-1), which is particularly high for a single X-bond. A remarkably short C-IO(-) contact is observed in the structure of the salt 1·H(2)PO(4)(-).

2-Iodo-imidazolium receptor binds oxoanions via charge-assisted halogen bonding.

CAMETTI, MASSIMO;METRANGOLO, PIERANGELO;PILATI, TULLIO MARIA;TERRANEO, GIANCARLO;RESNATI, GIUSEPPE
2012-01-01

Abstract

A detailed (1)H-NMR study of the anion binding properties of the 2-iodo-imidazolium receptor 1 in DMSO allows to fully attribute the observed affinities to strong charge-assisted C-IX(-) halogen bonding (XB). Stronger binding was observed for oxoanions over halides. Phosphate, in particular, binds to 1 with an association constant of ca. 10(3) M(-1), which is particularly high for a single X-bond. A remarkably short C-IO(-) contact is observed in the structure of the salt 1·H(2)PO(4)(-).
2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/633653
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