Question:
Which from following compounds does NOT contain oxygen as heteroatom?
Which from following compounds does NOT contain oxygen as heteroatom?
Show Hint
Look at the ring atom other than carbon in each heterocycle.
Updated On: Nov 13, 2026
- Furan
- THF
- 4H-Pyran
- Pyrrole
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
A heteroatom is any ring atom other than carbon.
Step 2: Check each compound
Furan has one oxygen in a five-membered ring.
THF (tetrahydrofuran) has one oxygen in a saturated five-membered ring.
4H-Pyran has one oxygen in a six-membered ring.
Pyrrole has a nitrogen atom as its heteroatom.
Step 3: Conclude
Pyrrole does not contain oxygen as the heteroatom.
Final Answer:
Pyrrole has nitrogen, not oxygen, as its heteroatom. \[ \boxed{\text{(D) }\text{Pyrrole}} \]
A heteroatom is any ring atom other than carbon.
Step 2: Check each compound
Furan has one oxygen in a five-membered ring.
THF (tetrahydrofuran) has one oxygen in a saturated five-membered ring.
4H-Pyran has one oxygen in a six-membered ring.
Pyrrole has a nitrogen atom as its heteroatom.
Step 3: Conclude
Pyrrole does not contain oxygen as the heteroatom.
Final Answer:
Pyrrole has nitrogen, not oxygen, as its heteroatom. \[ \boxed{\text{(D) }\text{Pyrrole}} \]
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