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Author(s) -
Braga Dario,
Maini Lucia,
Polito Marco,
Rossini Michele,
Grepioni Fabrizia
Publication year - 2000
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(20001117)6:22<4045::aid-chem4045>3.0.co;2-i
Subject(s) - isostructural , zwitterion , aqueous solution , hydrogen bond , chemistry , molecule , crystallography , ammonia , inorganic chemistry , crystal structure , organic chemistry
The cover picture shows the cage formed by four molecules of the organometallic zwitterion [(C 5 H 4 COOH) 2 Co] (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 [(C 5 H 4 COOH) 2 Co] + [PF 6 ] − 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 NH 4 + 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.