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Weak Intermolecular Anion–π Interactions in Pentafluorobenzyl‐Substituted Ammonium Betaines
Author(s) -
Giese Michael,
Albrecht Markus,
Wiemer Katharina,
Kubik Grzegorz,
Valkonen Arto,
Rissanen Kari
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200184
Subject(s) - chemistry , intermolecular force , intramolecular force , steric effects , betaine , ammonium , ion , carboxylate , sulfonate , nucleophile , computational chemistry , crystallography , molecule , stereochemistry , organic chemistry , sodium , catalysis
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 .