Abstract
Four receptors containing either 2-amidoindole or 7-nitro-2-amidoindole groups have been synthesised and shown to complex oxoanions in DMSO-d 6/0.5% water solution. X-ray crystal structure elucidation reveals that receptor 1 complexes dihydrogen phosphate ion pairs in the solid state, which are part of a continuous chain. While this receptor binds dihydrogen phosphate in a 1:1 stoichiometry in solution, compound 4, which contains 7-nitroindole groups, does form 1:2 receptor:dihydrogen phosphate complexes in DMSO-d 6/0.5% water.
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