Rhodizonate and croconate dianions as divergent hydrogen-bond acceptors in the self-assembly of supramolecular structuresDedicated to Dr. Tze-Lock Chan on the occasion of his retirement.
Abstract
The C5O52− and relatively unstable C6O62− dianions, each serving as a hub for binding with a set of convergent NH donor groups of four phenylurea molecules, have been generated in situ and stabilized in nearly isostructural hydrogen-bonded host lattices.