Is it possible to synthesize neutral pentagonal pyramidal compounds of carbon atom?

08 August 2017 1 4K Report

Recently Malischewski and Seppelt have reported crystal structure of Pentagonal-Pyramidal Hexamethylbenzene Dication C6(CH3)6

Francis Mair

That dication structure conforms to Wade's rules for cluster structures. Adding two electrons would stop it from being orbitally rich; it would revert to the benzene form, the most stable for that number of valence electrons with that number of atoms. So, in, short, i believe the answer is: probably not.

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