Heteropentalene

Heteropentalenes are class of heterocyclic compound. Heteropentalenes have one, two or more heteroatoms on the ring. It consists of two pentagonal rings. Heteropentalenes with 10 pi electrons show aromaticity. Some of heteropentalenes are mesomeric betaines. However those heteropentalenes are not mesoionic[1]

See also

References
  1. Kawase, Masami (2009). "The Chemistry of Bioactive Mesoionic Heterocycles". Bioactive Heterocycles VII. Topics in Heterocyclic Chemistry. 16. Springer. pp. 135–152. doi:10.1007/7081_2007_096. ISBN 978-3-642-00335-6.
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