Question

What's DU of this compound?

Answer 1

10

Answer 2

Solution:

1. Aromatic rings:

   Two benzene rings ➔ Each benzene contributes 4 DU (1 for the ring + 3 for the double bonds).

   Total from rings = 2 × 4 = 8 DU.

2. Carbonyl groups:

   There are two C=O groups (one in the benzoyl part and one as an acyl chloride) ➔ Each gives 1 DU.

   Total from carbonyls = 2 DU.

3. Total DU:

   8 DU (rings) + 2 DU (carbonyls) = 10 DU.

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Explanation (minimal):

• Two benzene rings contribute 8 DU.
• Two carbonyl groups contribute 2 DU.
• Total DU = 8 + 2 = 10.