Identify structure of 2,3-dibromo-1-phenylpentane.
The Correct Option is C
Approach Solution - 1
To identify the structure of 2,3-dibromo-1-phenylpentane, let's break down and understand the name as per IUPAC nomenclature rules:
- The base name "pentane" indicates a five-carbon alkane chain.
- A "phenyl" group at position 1 implies a benzene ring (phenyl) is attached to the first carbon of this chain.
- There are two bromine atoms attached at positions 2 and 3 of the carbon chain, indicated by "2,3-dibromo".
Let's now analyze the given options to determine which structure represents 2,3-dibromo-1-phenylpentane:
- Option 1: The structure shows incorrect placement of the bromine atoms and the phenyl group.
- Option 2: This structure similarly misplaces the substituents according to our IUPAC breakdown.
- Option 3: Here, the structure accurately places a phenyl group at the first carbon, and the bromine atoms at the second and third carbons:
Thus, Option 3 correctly depicts 2,3-dibromo-1-phenylpentane.
- Option 4: The arrangement doesn't conform to the specifications given in the name.
Therefore, the correct answer is represented by the structural diagram in Option 3.
Approach Solution -2
The IUPAC name 2,3-dibromo-1-phenylpentane indicates that:
- There is a phenyl group attached to the first carbon of the pentane chain.
- Bromine atoms are attached to the second and third carbons of the chain.
In the options provided, structure 3 matches this description, with a phenyl group at the first carbon and bromine atoms at the second and third carbons.
Thus, the correct structure is: Structure 3
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