Electrostatic potential map cyclobutadiene

Cyclobutadiene has four tt electrons and is antiaromatic. The tt electrons are localized into two double bonds rather than delocalized around the ring, as indicated by an electrostatic potential map. Cyclobutadiene is highly reactive and shows none of the properties associated with aromaticity. In fact, it was not even prepared until 1965. 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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