The nonbenzenoid aromatic D6h and enediolate C2v valence tautomers of the relatively unstable rhodizonate dianion (see picture) have been generated in situ and stabilized by hydrogen bonding with (3-hydroxyphenyl)urea and 1,1′-ethylenediurea, respectively, in two novel crystalline inclusion compounds.
No takes yet. Share an insight, caveat, or question.
Lam et al. (2001) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: