Valence Isomer - Benzene

Benzene

For example, Dewar benzene transforms spontaneously into its valence isomer benzene. The compounds both can be described as (CH)₆ but the arrangement of the six carbon-hydrogen blocks is different. Besides benzene and Dewar benzene, prismane, benzvalene and bicyclopropenyl are also valence-isomers of the (CH)₆ family. Topologically, more arrangements in this family are possible, though they have not been attested to in chemistry. The ring strain on angles or lengths of bonding prohibit their actual formation.

• The valence isomers of benzene

• Benzene

• Dewar benzene

• Prismane

• Benzvalene

• Bicyclopropenyl