In which of the following groups is the (-M) | vedclass

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Question

(D) The $(-M)$ effect (negative mesomeric effect) is observed in groups that withdraw electron density from the conjugated system through resonance.$1

Vedclass · Accepted Answer

$-NO_2$

Vedclass · Answer

(D) The $(-M)$ effect (negative mesomeric effect) is observed in groups that withdraw electron density from the conjugated system through resonance.$1$. $-NH_2$,$-OR$,and $-OH$ groups contain lone pairs of electrons on the atom directly attached to the conjugated system (e.g.,$N$ or $O$),which they donate into the system,thus exhibiting a $(+M)$ effect.$2$. The $-NO_2$ group is a strong electron-withdrawing group because the nitrogen atom is bonded to highly electronegative oxygen atoms and carries a formal positive charge,allowing it to withdraw electron density from the conjugated system via resonance,thus exhibiting a $(-M)$ effect.Therefore,the correct option is $D$.

Column $-I$	Column $-II$
$(i)$ $C_6H_5NH_2$	$(p)$ $-R$ effect
$(ii)$ $C_6H_5OH$	$(q)$ $+R$ effect
$(iii)$ $C_6H_5NO_2$	$(r)$ $+I$ effect
$(iv)$ $CH_3CH_2Cl$	$(s)$ $-I$ effect

In which of the following groups is the $(-M)$ effect observed?

Similar Questions

Match column $-I$ and column $-II$ with the correct electronic effect relation:

Column $-I$ Column $-II$

$(i)$ $C_6H_5NH_2$ $(p)$ $-R$ effect

$(ii)$ $C_6H_5OH$ $(q)$ $+R$ effect

$(iii)$ $C_6H_5NO_2$ $(r)$ $+I$ effect

$(iv)$ $CH_3CH_2Cl$ $(s)$ $-I$ effect

In which of the following molecules do all the effects namely inductive,mesomeric and hyperconjugation operate?

The decreasing order of $-I$ (inductive) effect power for the given groups is:
$A. -CN$
$B. -NO_2$
$C. -NH_2$
$D. -F$

The rate of attack of an electrophile is least when $X$ in the given compound is

Formic acid is a stronger acid than acetic acid. This can be explained using

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