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In organic chemistry a diene ( ) or diolefin ( ) is a hydrocarbon that contains two carbon double bonds. Dienes occur occasionally in nature. Conjugated dienes are widely used as monomers in the polymer industry. ==Classes== Dienes can be divided into three classes, depending on the relative location of the double bonds: #Cumulated dienes have the double bonds sharing a common atom as in a group of compounds called allenes. #Conjugated dienes have conjugated double bonds separated by one single bond. #Unconjugated dienes have the double bonds separated by two or more single bonds. They are usually less stable than isomeric conjugated dienes. This can also be known as an isolated diene. Compounds that contain more than two double bonds are called polyenes. Polyenes and dienes share many of their properties. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「diene」の詳細全文を読む スポンサード リンク
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