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What is the structure of the acetal formed by reaction of ethanol with acetophenone?
The structure of the acetal is ##"C"_6"H"_5"C"("CH"_3)("OCH"_2"CH"_3)_2##.
The structure of the acetal is ##"C"_6"H"_5"C"("CH"_3)("OCH"_2"CH"_3)_2##.
Ketones react in the presence of acids to form hemiacetals, and the hemiacetals can react further to form acetals.
The general equation is
##"RCOR' + 2R''OH" stackrel("HCl")(→) "RR'C"("OR''")_2 + "H"_2"O"##
The mechanism is
(from en.wikipedia.org)
In the addition of ethanol to acetophenone, ##"R" = "C"_6"H"_5##, ##"R'" = "CH"_3##, and ##"R''" = "CH"_2"CH"_3##.
So the structure of the acetal is given by the equation
##"C"_6"H"_5"COCH"_3 + "2CH"_3"CH"_2"OH" stackrel("HCl")(→) "C"_6"H"_5"C"("CH"_3)("OCH"_2"CH"_3)_2##
