Anion-driven encapsulation of cationic guests inside pyridine[4]arene dimers

• Anniina Kiesilä,
• Jani O. Moilanen,
• Anneli Kruve,
• Christoph A. Schalley,
• Perdita Barran and
• Elina Kalenius

Beilstein J. Org. Chem. 2019, 15, 2486–2492, doi:10.3762/bjoc.15.241

• an endo location of the cation. Ion mobility mass spectrometry (IM-MS) is a powerful tool to study structural features such as the endo/exo complexation of supramolecular complexes [11][15][16][17][18]. Drift tube ion mobility mass spectrometry (DT-IMMS) enables the determination of structure-related

• difference in endo/exo complexation is clear in IM-MS, when the larger PF6− anion is used in the experiment. For complexes with smaller anions BF4− and I− the structural conclusions are more difficult to draw based only on CCS values, as the difference between the endo and exo complexes is smaller. To obtain

Host–guest complexes of conformationally flexible C-hexyl-2-bromoresorcinarene and aromatic N-oxides: solid-state, solution and computational studies

• Rakesh Puttreddy,
• Ngong Kodiah Beyeh,
• S. Maryamdokht Taimoory,
• Daniel Meister,
• John F. Trant and
• Kari Rissanen

Beilstein J. Org. Chem. 2018, 14, 1723–1733, doi:10.3762/bjoc.14.146

• , aiding in the binding of polar guests such as N-oxides. Keywords: aromatic N-oxides; C–H···π Interactions; ditopic receptors; endo/exo complexation; host–guest chemistry; resorcinarenes; Introduction Resorcinarenes are macrocyclic compounds with a bowl-shaped cavity stabilised by circular