Which of the following compounds shows both -I and +M effects?
Practice Questions
1 question
Q1
Which of the following compounds shows both -I and +M effects?
Acetic acid
Nitrobenzene
Anisole
Benzaldehyde
Benzaldehyde shows a -I effect due to the carbonyl group and a +M effect due to the aromatic ring.
Questions & Step-by-step Solutions
1 item
Q
Q: Which of the following compounds shows both -I and +M effects?
Solution: Benzaldehyde shows a -I effect due to the carbonyl group and a +M effect due to the aromatic ring.
Steps: 6
Step 1: Understand what -I and +M effects are. -I (inductive effect) means a group pulls electrons away, while +M (mesomeric effect) means a group donates electrons through resonance.
Step 2: Identify the compound in question, which is benzaldehyde.
Step 3: Analyze the structure of benzaldehyde. It has a carbonyl group (C=O) and an aromatic ring (benzene).
Step 4: Determine the effects of the carbonyl group. The carbonyl group pulls electrons away from the rest of the molecule, showing a -I effect.
Step 5: Determine the effects of the aromatic ring. The aromatic ring can donate electrons through resonance, showing a +M effect.
Step 6: Conclude that benzaldehyde shows both -I and +M effects due to its structure.
