Question

what are the two groups on either side of the carbonyl in an ester?
select the correct answer below:
○ r and r
○ r and oh
○ r and nh₂
○ r and or

Explanation:

Esters have the general formula \( R - COO - R’ \). The carbonyl (\( C=O \)) group has \( R \) (from the carboxylic acid part) on one side and \( OR’ \) (from the alcohol part) on the other side. For example, in ethyl acetate (\( CH_3COOCH_2CH_3 \)), \( R = CH_3 - \) and \( OR’= - OCH_2CH_3 \). \( R \) and \( R’ \) would be for ketones (if \( R - CO - R’ \)), \( R \) and \( OH \) is for carboxylic acids (\( R - COOH \)), and \( R \) and \( NH_2 \) is for amides (\( R - CONH_2 \)).

Answer:

R and OR’