In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound?

Question

Canvas Classes · Accepted Answer

Step 1: Calculate %Br from the Given Data

Given:
- Mass of compound = 0.172 g
- Mass of Br = 0.08 g

Step 2: Calculate Molar Mass from %Br

If the compound has one Br atom (Br = 80 g/mol):

If the compound has two Br atoms (2 × Br = 160 g/mol):

Step 3: Match with Given Structures

(a) Bromoethane : MW = 109 g/mol → %Br = 80/109 = 73.4% ❌

(b) Unknown: Cannot evaluate without structure.

(c) 2,4-Dibromoaniline : MW = 250.9 g/mol → %Br = 160/250.9 = 63.8% ❌

(d) 4-Bromoaniline : MW = 172 g/m

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