CH3 HBr 6. Consider the following reaction: ? ČH3 a) Draw the two possible allylic cations that could be produced as an intermediate in this addition reaction; include resonance structures. b) Which of these allylic cations is more stable, explain briefly how you arrived at that conclusion? c) Draw the complete mechanism for the addition reaction involving the more stable allylic cation intermediate showing the formation of both the 1,2 and 1,4 addition products, include arrows, formal charges and electron pairs.
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.

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