When pure (S)-lactic acid is esterified by racemic butan-2-ol, the product is 2-butyl lactate, with the following structure:H+CH3 CH COOH CH3 CH CH3 CH CHOH OHCH2CH3 CH2CH3lactic acidC OOH CH O 3butan-2-ol 2-butyl lactate+(a) Draw three-dimensional structures of the two stereoisomers formed, specifying the configuration at each asymmetriccarbon atom. (Using your models may be helpful.)(b) Determine the relationship between the two stereoisomers you have drawn
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
When pure (S)-lactic acid is esterified by racemic butan-2-ol, the product is 2-butyl lactate, with the following structure:
H+
CH3 CH COOH CH3 CH CH3 CH CH
OH OH
CH2CH3 CH2CH3
lactic acid
C O
OH CH O 3
butan-2-ol 2-butyl lactate
+
(a) Draw three-dimensional structures of the two stereoisomers formed, specifying the configuration at each asymmetric
carbon atom. (Using your models may be helpful.)
(b) Determine the relationship between the two stereoisomers you have drawn
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