Nomenclature Of Organic Compounds

name of organic compound

In IUPAC nomenclature, the priority of functional groups is determined by their oxidation state and chemical behavior. The order of decreasing priority is: carboxylic acid (–COOH) > sulfonic acid (–SO\textsubscript{3}H)>nitrile (–CN) > aldehyde (–CHO)>alcohol (–OH). This is crucial for naming the parent chain in complex compounds.

Step 1: Identify the parent chain.
The parent chain is benzene.
Step 2: Number the benzene ring to give the lowest locants to the substituents, prioritizing alphabetical order.
Substituents are chloro (-Cl), methyl (-CH ), and nitro (-NO ). Alphabetical order: chloro, methyl, nitro.
Assign position 1 to the carbon with chloro. Numbering clockwise gives methyl at 2 and nitro at 4 (1, 2, 4). Numbering counterclockwise gives methyl at 6 and nitro at 3 (1, 3, 6). The lowest set is 1, 2, 4.
Step 3: Name the substituents with their positions.
Chloro at position 2
Methyl at position 1
Nitro at position 4
Step 4: Write the IUPAC name in alphabetical order of substituents followed by benzene.
2-chloro-1-methyl-4-nitrobenzene
Thus, the IUPAC name is .

Step 1: Naming Compound A (Amine)
- The longest chain has 4 carbons → Butene.
- The double bond starts at C-1 → But-1-ene.
- The amine (-NH ) is at C-3 → But-1-en-3-amine. Step 2: Naming Compound B (Aromatic Amine)
- The benzene ring has a chloro (-Cl) group at C-4.
- The dimethylamine (-N(CH ) ) is at C-1.
- Correct IUPAC name → 4-Chloro-N, N-dimethylbenzenamine.
Thus, the correct answer is . \bigskip