Which of the following structures of carboxyl | vedclass

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(A) The acidic nature of carboxylic acids is primarily due to the resonance stabilization of the carboxylate ion $(R-COO^-)$ formed after the loss of

Vedclass · Accepted Answer

$R-C(=O)OH$

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(A) The acidic nature of carboxylic acids is primarily due to the resonance stabilization of the carboxylate ion $(R-COO^-)$ formed after the loss of a proton $(H^+)$.The resonance structures of the carboxylic acid group are:$R-C(=O)OH \leftrightarrow R-C(O^-)=O^+H$This resonance allows the negative charge to be delocalized over two oxygen atoms in the carboxylate ion,making the release of the proton favorable.Option $(A)$ represents the structure of the carboxylic acid group itself,which undergoes this resonance stabilization.

Compound	Common Name	$IUPAC$ Name
$(i) \ HCOOH$	Formic acid	Methanoic acid
$(ii) \ CH_3COOH$	Acetic acid	Ethanoic acid
$(iii) \ CH_3CH_2COOH$	Propionic acid	Propanoic acid
$(iv) \ C_6H_5COOH$	Benzoic acid	Benzenecarboxylic acid (Benzoic acid)
$(v) \ (COOH)_2$	Oxalic acid	Ethanedioic acid
$(vi) \ HOOCCH_2CH_2COOH$	Succinic acid	Butanedioic acid

Which of the following structures of carboxylic acid accounts for its acidic nature?

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