Which one of the following is not an intermed | vedclass

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(B) The reaction is an acid-catalyzed esterification (Fischer esterification) between a carboxylic acid and an alcohol.$1$. Protonation of the carbony

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$CF_3C(OH)(OH^-)OCH(CH_3)_2^+$

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(B) The reaction is an acid-catalyzed esterification (Fischer esterification) between a carboxylic acid and an alcohol.$1$. Protonation of the carbonyl oxygen of $CF_3COOH$ gives $CF_3C(OH)_2^+$.$2$. Nucleophilic attack by the alcohol $CH_3CH(OH)CH_3$ on the activated carbonyl carbon leads to the tetrahedral intermediate $CF_3C(OH)_2OCH(CH_3)_2^+$.$3$. Proton transfer occurs to form $CF_3C(OH)(OH_2^+)OCH(CH_3)_2$.$4$. Elimination of water and deprotonation yields the ester $CF_3C(O)OCH(CH_3)_2$.Option $B$ involves an $OH^-$ species,which is a strong base and cannot exist in a highly acidic medium $(H_2SO_4)$. Therefore,it is not a valid intermediate.

Which one of the following is not an intermediate in the generally accepted mechanism for the reaction shown below?
$CF_3C(O)OH + CH_3CH(OH)CH_3 \xrightarrow{H_2SO_4} CF_3C(O)OCH(CH_3)_2 + H_2O$

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Which one of the following is not an intermediate in the generally accepted mechanism for the reaction shown below?$CF_3C(O)OH + CH_3CH(OH)CH_3 \xrightarrow{H_2SO_4} CF_3C(O)OCH(CH_3)_2 + H_2O$