The decreasing order of acidic strength of di | vedclass

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(A) The acidic strength of $-OH$ groups depends on the stability of the conjugate base formed after the loss of a proton. $1$. The group labeled $w$ i

Vedclass · Accepted Answer

$w > x > y > z$

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(A) The acidic strength of $-OH$ groups depends on the stability of the conjugate base formed after the loss of a proton. $1$. The group labeled $w$ is a phenolic $-OH$ group,which is significantly more acidic than alcoholic $-OH$ groups due to the resonance stabilization of the phenoxide ion. $2$. Among the remaining alcoholic groups $(x, y, z)$,the acidity is influenced by the inductive effect $(-I)$ of the phenyl ring. $3$. Group $x$ is directly attached to the phenyl ring,experiencing the strongest $-I$ effect of the ring. $4$. Group $y$ is attached to a carbon adjacent to the phenyl ring,experiencing a weaker $-I$ effect and some $+I$ effect from the alkyl chain. $5$. Group $z$ is further away,experiencing the least $-I$ effect and more $+I$ effect from the alkyl chain,making it the least acidic. Thus,the decreasing order of acidic strength is $w > x > y > z$.

The decreasing order of acidic strength of different $(-OH)$ groups is:

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