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Munchnones
No, these aren't the favourite compound of the Munchkins
(not to be confused with my wife Sheila...also known as Munchkin!) from The Wizard of Oz, but are in fact
a type of mesoionic compound. These are ring structures in which the positive and negative charge are delocalised, and which cannot be represented satisfactorily
by any one polar structure. They got their name when Huisgen called them after the city Munich (München), after similar compounds
were called sydnones after Sydney.
Huisgen et al. Chem. Ber. 1970, 103, 2611.
Thanks
to Matthew J. Dowd, Virginia Commonwealth University, Richmond, VA, for supplying this one.
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