Organic Chemistry Functional Groups, Spectroscopy & Reaction Review (With Rationales ACS Final Examwith correct answers graded a+ for 2026 assured excel!!

Organic Chemistry Functional Groups,
Spectroscopy & Reaction Review
(With Rationales ACS Final Examwith
correct answers graded a+ for 2026
assured excel!!
Organic Chemistry Functional Groups, Spectroscopy & Reaction Review (With Rationales)



Functional Groups

1. Ketone

Answer: Carbonyl group (C=O) bonded to two carbon atoms

Rationale: Ketones have the general structure R–CO–R'. The carbonyl carbon is located
within the carbon chain.



2. Aldehyde

Answer: Carbonyl group bonded to at least one hydrogen

Rationale: Aldehydes have the structure R–CHO and are always found at the end of a
carbon chain.



3. Carboxylic Acid

Answer: –COOH

Rationale: Contains both a carbonyl group and hydroxyl group on the same carbon.



4. Ester

Answer: –COOR

, Rationale: Formed by reaction of a carboxylic acid with an alcohol.



5. Amide

Answer: –CONH₂, –CONHR, or –CONR₂

Rationale: Contains a carbonyl attached directly to nitrogen.



6. Anhydride

Answer: RCO–O–COR

Rationale: Formed from two carboxylic acids with loss of water.



7. Amine

Answer: Nitrogen-containing functional group (RNH₂, R₂NH, R₃N)

Rationale: Amines are derivatives of ammonia (NH₃).



8. Ether

Answer: R–O–R

Rationale: Oxygen is bonded to two carbon-containing groups.



Isomers

9. Constitutional Isomers

Answer: Same molecular formula, different connectivity

Rationale: Atoms are connected differently.



10. Stereoisomers

Answer: Same formula, same connectivity, different spatial arrangement