Chapter 1: Problem 131

(a) \(\alpha\) -methyl-p-bromophenyl acetic acid (b) 2 - \((4\) -bromophenyl) propanoic acid (c) 2 -methyl \(\mathrm{p}\) -bromophenyl acetic acid (d) p-bromophenyl propionic acid

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Question: Identify the parent chain, substituents, and functional groups for each of the given organic compounds: a) α-methyl-p-bromophenyl acetic acid b) 2-(4-bromophenyl)propanoic acid c) 2-methyl p-bromophenyl acetic acid d) p-bromophenyl propionic acid

Step by step solution

Compound (a): \(\alpha\) -methyl-p-bromophenyl acetic acid

To identify substituents and functional groups of this compound, first, identify the parent chain as an acetic acid which contains a carboxylic acid group (-COOH) bonded to a phenyl ring. The term \(\alpha\) -methyl refers to a methyl group (-CH3) on the carbon atom adjacent to the carboxylic acid group. The p-bromophenyl represents a bromine atom (-Br) bonded to a phenyl ring at the para position. Structure: CH3CH(COOH)(CH2)C6H4Br

Compound (b): 2 - \((4\) -bromophenyl) propanoic acid

To identify substituents and functional groups of this compound, first, identify the parent chain as a propanoic acid, which contains a carboxylic acid group (-COOH) attached to a propyl chain. The 2 - \((4\) -bromophenyl) indicates the presence of a bromophenyl group attached to the second carbon of the propyl chain and the presence of a bromine atom (-Br) bonded to a phenyl ring at the 4th position. Structure: CH3CH(BrC6H4)CH2COOH

Compound (c): 2-methyl \(\mathrm{p}\) -bromophenyl acetic acid

To identify substituents and functional groups of this compound, first, identify the parent chain as an acetic acid which has a carboxylic acid group (-COOH) bonded to a 2-methyl phenyl ring. The p-bromophenyl indicates the presence of a bromine atom (-Br) bonded to the phenyl ring at the para position. Structure: CH3COO(C6H4CH3)Br

Compound (d): p-bromophenyl propionic acid

To identify substituents and functional groups of this compound, first, identify the parent chain as a propionic acid, which contains a carboxylic acid group (-COOH) attached to a propyl chain. The p-bromophenyl indicates that a phenyl ring with a bromine atom (-Br) at the para position is bonded to the propyl chain. Structure: CH3CH2CH2C6H4BrCOOH

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(a) \(\alpha\) -methyl-p-bromophenyl acetic acid (b) 2 - \((4\) -bromophenyl) propanoic acid (c) 2 -methyl \(\mathrm{p}\) -bromophenyl acetic acid (d) p-bromophenyl propionic acid

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Step by step solution

Compound (a): \(\alpha\) -methyl-p-bromophenyl acetic acid

Compound (b): 2 - \((4\) -bromophenyl) propanoic acid

Compound (c): 2-methyl \(\mathrm{p}\) -bromophenyl acetic acid

Compound (d): p-bromophenyl propionic acid

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