Question

Do you predict calix[4]pyrrole will Bond to a keggin anion? Explain your reasoning.

Answer 1

Yes calix[4]pyrrole will Bond to a keggin anion as the meso-aryl substituents of the calix[4]pyrrole core is electron deficient and will attractive towards the anion-pie interactions exists between the aromatic walls of receptor and the sandwiched anion. These interaction controls selectivity of the electrode as calix[4]pyrrole bearing a para nitro withdrawing group on each of the meso-phenyl rings and afforded senors that display anti-hofmeister behaviour against lipophilic salicylate and nitrate ion . Thus, calix[4]pyrrole will Bond to a keggin anion .