-ene

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The suffix -ene is used in organic chemistry to form names of organic compounds where the -C=C- group has been attributed the highest priority according to the rules of organic nomenclature. Sometimes a number between hyphens is inserted before it to state atom the double bond starts at. This suffix is taken from the end of the word ethylene, which is the simplest alkene. The final "-e" disappears if it is followed by a suffix that starts with a vowel, e.g. "-enal" which is a compound that contains both a -C=C- bond and an aldehyde functional group. If the other suffix starts with a consonant, the final "-e" remains, e.g. "-enediyne" (which has the "-ene" suffix and also the "-yne" suffix, for a compound with a double bond and two triple bonds.)

A Greek number prefix before the "-ene" indicates that many double bonds, e.g. butadiene.

Template:Orgchemsuffixes

See also

• IUPAC nomenclature of organic chemistry