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Polycyclic aromatic hydrocarbons at different crossroads in Zagreb, Croatia

Anica Sišović1, Gordana Pehnec, Ivana Jakovljević

  • 1Institute for Medical Research and Occupational Health, Zagreb, Croatia.

Bulletin of Environmental Contamination and Toxicology
|January 6, 2012
PubMed

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Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
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