Multiple Choice

Which of the following have +M effect ($$\bar { e }$$-donating mesomeric effect) ?

A$$-N{O}_{2}$$
B$$-COOH$$
C$$-N{H}_{2}$$
Correct Answer
D$$-SR$$
Correct Answer

Solution

$$-N{O}_{2}$$ and $$-COOH$$ are electron withdrawing groups whereas $$-N{H}_{2}$$ and $$-SR$$ have +M effect ($$\bar { e }$$-donating mesomeric effect) due to presence of lone pairs of electrons.

Here (C) and (D) have LP $$ \bar {e} s - \ddot {N}H_2 - \ddot {S}R $$

SIMILAR QUESTIONS

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