Anion binding properties of 5,5′-dicarboxamido-dipyrrolylmethanes†
Abstract
A series of 5,5′-dicarboxamido-dipyrrolylmethanes have been synthesized and in some cases crystallographically characterized. Proton NMR titrations have revealed that these compounds, that contain only four neutral hydrogen bond donors and are acyclic, selectively bind anions in very competitive