Chemistry - A European Journal
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editor: Neville Compton, Deputy Editors: Anne Deveson, Elisabeth Roedern
Impact Factor: 5.771
ISI Journal Citation Reports © Ranking: 2015: 24/163 (Chemistry Multidisciplinary)
Online ISSN: 1521-3765
Associated Title(s): Angewandte Chemie International Edition, Chemistry – An Asian Journal, ChemistryOpen, ChemistrySelect, ChemBioChem, ChemCatChem, ChemElectroChem, ChemMedChem, ChemPhotoChem, ChemPhysChem, ChemPlusChem, ChemSusChem, European Journal of Inorganic Chemistry, European Journal of Organic Chemistry
The cover picture shows the cage formed by four molecules of the organometallic zwitterion [(C5H4COOH)2Co] (Co: green, O: red, C: orange, H: gray) held together by O−H···O (solid red) and C−H···O (blue-dashed) bonds and encapsulating a Cs+ cation (blue). The cage is obtained by treatment of an aqueous solution of [(C5H4COOH)2Co]+[PF6]− with CsOH. Isostructural cages are obtained with KOH, RbOH, and ammonia. The cations are encapsulated through either M+···O interactions (in the cases of K, Rb, Cs) or N−H···O hydrogen bonds in the case of the NH4+ cation. The organization in the cage-salts demonstrates a remarkable capacity for the organometallic zwitterion to self-assemble around monovalent cations. The systems are described in more details by Braga et al. on p. 4227 ff.