KnowraCyclobutadieneLinked fromLinked fromThe 7 pages that link to Cyclobutadiene, each with the reason it gives.All 7Broader topic 3Compared with 4AromaticityBroader topic: Its electronic instability is a classic case associated with antiaromaticity.BenzeneCompared with: It contrasts benzene’s aromatic stability with the destabilization of a 4n π-electron ring.Hückel's ruleBroader topic: Its four-electron count illustrates why the 4n pattern is unfavorable in a planar conjugated ring.Aromatic compoundCompared with: It is a classic example of a system that would be antiaromatic if planar.Cyclopentadienyl anionCompared with: Its four-electron ring illustrates the contrasting destabilization associated with a 4n system.AntiaromaticityBroader topic: It is the textbook 4π-electron example, stabilized structurally by bond alternation.Aliphatic compoundCompared with: Its antiaromaticity shows that a cyclic structure is not automatically aliphatic or aromatic.