Dienes are hydrocarbons which contain two double bonds. Dienes are intermediate between alkenes and polyenes.

Classes

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Dienes can divided into three classes:

1. Unconjugated dienes have the double bonds separated by two or more single bonds.
2. Conjugated dienes have conjugated double bonds separated by one single bond
3. Cumulated dienes have the double bonds sharing a common atom as in a group of compounds called allenes.

In organic chemistry a conjugated diene is also a functional group.

Reactions with dienes

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The 1,3 configuration of double bonds found in 1,3-butadiene (conjugated double bonds) make these types of dienes capable of participating in more reaction types than is the case for molecules with either just a single alkene functional group or with multiple, but non-alternating, alkene groups. One possible reaction for such dienes is the Diels-Alder reaction.

functional groups | Hydrocarbons

دايين | Polyene | Diène | Alkadiēni | Alkadieen | Dien | Диены | Диен | Dien