Question:
The correct structure of 2,6-Dimethyl-dec-4-ene is :
The correct structure of 2,6-Dimethyl-dec-4-ene is :
Updated On: Nov 13, 2025
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The Correct Option is B
Solution and Explanation
In order to determine the correct structure of 2,6-Dimethyl-dec-4-ene, we must analyze its IUPAC name step-by-step to deduce the structure:
- Base Chain Identification: The base chain is "dec" which indicates that the carbon chain consists of 10 carbon atoms.
- Type of Bond: The suffix "-4-ene" indicates that there is a double bond located at the 4th carbon-carbon position within the chain.
- Substituents: The substituents are indicated by "2,6-Dimethyl." This means there are methyl groups (-CH3) attached to the 2nd and 6th carbon atoms of the main chain.
Here's the step-by-step construction of the compound:
- Start by drawing a straight chain of 10 carbon atoms.
- Place a double bond between the 4th and 5th carbon atoms, as the "-4-ene" indicates.
- Attach methyl groups to the 2nd and 6th carbon atoms of the carbon chain.
Now, let's compare this structure with the given options. The correct image should reflect this arrangement: 10 carbon atoms in the main chain with the specified double bond and both methyl groups correctly positioned.
This representation correctly aligns with the requirements of the IUPAC name.
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Concepts Used:
Alkenes
Alkenes
In organic chemistry, an alkene is a hydrocarbon containing a carbon-carbon double bond.[1]
Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds.
Read More: Ozonolysis
IUPAC Nomenclature of Alkenes
- An alkene or cycloalkene is indicated by the suffix (ending) ene.
- For the root name, the longest chain must include both carbon atoms of the double bond.
- The root chain must be numbered beginning at the end closest to a double bond carbon atom. If the double bond is in the chain's centre, the nearest substituent rule is used to determine where the numbering begins.
- If the compound contains more than one double bond, it is named with a diene, triene, or equivalent prefix indicating the number of double bonds, and each double bond is assigned a locator number.
Read More: Unsaturated Hydrocarbon