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Which functional group is present in the molecule named ?
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B
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1
Identify the root name of the compound, which is 'hexene'. The suffix '-ene' indicates the presence of a carbon-carbon double bond, characteristic of an alkene functional group.
Recognize the numbering in the name '2-ethyl-1-hexene'. The '1-hexene' part means the double bond starts at carbon 1 of the hexene chain.
Note the substituent '2-ethyl', which is an ethyl group attached to carbon 2 of the main chain. This does not change the functional group but provides information about branching.
Recall the definitions of the functional groups listed: Alcohols contain an -OH group, Aldehydes have a -CHO group, Alkynes contain a carbon-carbon triple bond, and Alkenes contain a carbon-carbon double bond.
Since the name includes 'hexene' indicating a double bond and no other functional group suffixes or prefixes are present, conclude that the functional group in this molecule is an alkene.