Simultaneous binding of boron and ammonium cation by a pseudocryptand: synthesis, X-ray analysis and solution studies by NMR spectroscopy
- 1 January 1995
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 15,p. 1505-1506
- https://doi.org/10.1039/c39950001505
Abstract
Treatment of the macrocyclic compound 1 bearing two catecholate moieties with equimolar amounts of B(OH)3 and aqueous NH3 in a H2O–EtOH mixture gave exclusively the ammonium inclusion complex 2 which was then studied both in solution and in the solid state; the selectivity sequence NH4 + > Na+ > Cs+ in CD3OD solution was obtained and the ammonium ion complex 2 was found to be more stable than the ([222], NH4+) complex by at least 3 orders of magnitude.Keywords
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