6533b7d2fe1ef96bd125ec03

RESEARCH PRODUCT

Weak Intermolecular Anion–π Interactions in Pentafluorobenzyl-Substituted Ammonium Betaines

Markus AlbrechtMichael GieseGrzegorz KubikKatharina WiemerKari RissanenArto Valkonen

subject

Steric effectschemistry.chemical_classificationStereochemistryIntermolecular forceSupramolecular chemistryChemieMedicinal chemistryIonInorganic Chemistrychemistry.chemical_compoundBetainechemistryNucleophileIntramolecular forceNon-covalent interactionsta116

description

A series of ammonium–carboxylate and ammonium–sulfonate betaines was synthesized and studied by single-crystal X-ray diffraction analysis to investigate the weak intermolecular interactions as well as the intramolecular interactions in the solid state. None of the expected intramolecular anion–π interactions could be observed, probably because of the steric demands and the reduced nucleophilicity of the anionic part of the betaines. Nevertheless, a weak intermolecular anion–π interaction between the anionic part of the betaine and the pentafluorophenyl unit is present in the structure of 5a.

10.1002/ejic.201200184https://doi.org/10.1002/ejic.201200184