What is the structure of the acetal formed by reaction of ethanol with acetophenone?
February 20th, 2023
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##