Question 8 of 26beginner🔧 ApplyShort Answer2 marks

Write the structures of the following organic halogen compounds.

(i)

2-Chloro-3-methylpentane

Answer

CH₃-CH(Cl)-CH(CH₃)-CH₂-CH₃

(ii)

p-Bromochlorobenzene

Answer

Benzene ring with Br and Cl at para positions (1,4)

(iii)

1-Chloro-4-ethylcyclohexane

Answer

Cyclohexane ring with Cl at position 1 and ethyl group (CH₂CH₃) at position 4

(iv)

2-(2-Chlorophenyl)-1-iodooctane

Answer

I-CH₂-CH(2-chlorophenyl)-(CH₂)₅-CH₃

(v)

2-Bromobutane

Answer

CH₃-CH(Br)-CH₂-CH₃

(vi)

4-tert-Butyl-3-iodoheptane

Answer

CH₃-CH₂-CH(I)-CH(C(CH₃)₃)-CH₂-CH₂-CH₃

(vii)

1-Bromo-4-sec-butyl-2-methylbenzene

Answer

Benzene ring with Br at position 1, sec-butyl at position 4, and methyl at position 2

(viii)

1,4-Dibromobut-2-ene

Answer

Br-CH₂-CH=CH-CH₂-Br

Explanation

This question tests the student's ability to draw structures from IUPAC names of haloalkanes and haloarenes. For each compound, identify the parent chain/ring, number it correctly, and place substituents at indicated positions. In (i) and (v), halogen and alkyl groups are on an alkyl chain. In (ii) and (vii), substituents are on a benzene ring. In (iii), the parent is a cyclohexane ring. In (iv), a 2-chlorophenyl group is attached to an octane chain. In (vi), tert-butyl is a branched alkyl group. In (viii), the double bond is between carbons 2 and 3 of butene.