Nomenclature Of Organic Compounds

Step 1: Identify the parent chain.
The longest carbon chain = 3 carbons propane.
Step 2: Locate substituent.
The –NH group is attached to the 2nd carbon.
Step 3: Apply IUPAC rule.
Thus, the correct IUPAC name = Propan-2-amine.
Step 4: Check options.
- (A) Propyl amine: common name.
- (B) Isopropyl amine: common name, not IUPAC.
- (C) Propan-2-amine: Correct IUPAC.
- (D) Propan-1-amine: Wrong carbon position.

Step 1: Identify the parent chain.
The longest chain contains 3 carbons propane is the parent chain.
Step 2: Locate substituents.
- A bromo group is attached at carbon 2.
- A methyl group is also attached at carbon 2.
Step 3: Apply IUPAC rules.
The name becomes .
Step 4: Check incorrect options.
(A) Tertiary butyl chloride: Wrong halogen.
(B) Secondary butyl chloride: Incorrect structure.
(C) 2-bromo-2-methyl propane: Correct IUPAC name.
(D) 2,2-dimethyl-1-bromoethane: Incorrect naming.
Step 5: Conclusion.
Thus, the correct name is (C) 2-bromo-2-methyl propane.

Step 1: Identify the parent chain.
The compound has three carbons with a carboxylic acid group parent acid is propanoic acid.
Step 2: Locate and name the substituent.
There is an (hydroxy) substituent on the second carbon: .
Step 3: Write the IUPAC name.
Position + substituent + parent: .
Step 4: Conclusion.
Hence, the correct option is (B).

Step 1: Understanding the IUPAC naming.
The molecule is a butanol with a methyl group on the second carbon. In IUPAC nomenclature, we first identify the longest chain, then number it such that the hydroxyl group is on the lowest possible numbered carbon. Step 2: Analysis of options.
(A) 2-methyl-1-propanal: This is incorrect because "propanal" indicates an aldehyde, not an alcohol.
(B) Isobutyl alcohol: This is incorrect because the structure is not an isobutyl group.
(C) 2-methyl-1-butanol: Correct — This is the correct IUPAC name, as it reflects the hydroxyl group on the first carbon and a methyl group on the second.
(D) None of these: This is incorrect because option (C) is correct.
Step 3: Conclusion.
The correct answer is (C) because the IUPAC name for is 2-methyl-1-butanol.

Step 1: Identifying the structure.
The compound is a simple alkane with a chlorine atom attached to the first carbon in a butane chain. The correct name involves identifying the position of the chlorine and the methyl group. Step 2: Analysis of options.
(A) 1-chloro-2-methyl butane: This is incorrect because the methyl group is attached to the third carbon, not the second.
(B) 1-chloroisopentane: This is incorrect because the compound is not isopentane; it has a linear chain.
(C) 1-chloro-3-methyl butane: Correct — This is the correct IUPAC name as the chlorine is at position 1, and the methyl group is at position 3.
(D) None of these: This is incorrect since (C) is the correct name.
Step 3: Conclusion.
The correct answer is (C) because the chlorine is at position 1, and the methyl group is at position 3 in the butane chain.

(i) IUPAC Name of :
The IUPAC name of this compound is Ethanol (Ethyl alcohol), as it consists of a two-carbon chain with a hydroxyl group (-OH) attached to the second carbon.
(ii) IUPAC Name of :
The IUPAC name of this compound is Propan-1-ol, as it is a three-carbon alcohol with the hydroxyl group attached to the first carbon.

Step 1: Identify the structure of the compounds.
- (i) CH₃-CH₂-N-CH₃ This is an amine compound. The structure consists of a two-carbon chain with a nitrogen atom attached to both a methyl group (CH₃) and an ethyl group (CH₂). - (ii) CH₃-CH-CONH₂ This compound is an amide. It has a two-carbon chain with a carbonyl group (C=O) attached to an amine group (-NH₂).
Step 2: Assign IUPAC names.
- (i) The IUPAC name of the compound is N-Ethylmethanamine. - (ii) The IUPAC name of the compound is Ethanamide.
Final Answer: (i) N-Ethylmethanamine
(ii) Ethanamide
Final Answer: