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Preferred Label : dienes;

IUPAC definition : Compounds that contain two fixed double bonds (usually assumed to be between carbon atoms). Dienes in which the two double-bond units are linked by one single bond are termed conjugated, e.g. CH sub 2 /sub CH–CH CH sub 2 /sub buta-1,3-diene. Dienes in which the double bonds are adjacent are called cumulative, e.g. CH sub 3 /sub –CH C CH sub 2 /sub buta-1,2-diene. Those in which one or more of the unsaturated carbon atoms is replaced by a heteroatom may be called heterodienes.;

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Compounds that contain two fixed double bonds (usually assumed to be between carbon atoms). Dienes in which the two double-bond units are linked by one single bond are termed conjugated, e.g. CH sub 2 /sub CH–CH CH sub 2 /sub buta-1,3-diene. Dienes in which the double bonds are adjacent are called cumulative, e.g. CH sub 3 /sub –CH C CH sub 2 /sub buta-1,2-diene. Those in which one or more of the unsaturated carbon atoms is replaced by a heteroatom may be called heterodienes.

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29/07/2025


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