Consider the reaction of HBr with ethylene and propylene. At room temperature the reaction of propylene with HBr is much faster than the reaction with ethylene. Using reaction energy diagrams and your knowledge of carbocation stability explain why this is so. b) Xylene (dimethylbenzene) is a commonly used chemical in the printing industry and as a cleaning solvent for oily waste. It is also used when preparing histological samples to
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.
a) Consider the reaction of HBr with ethylene and propylene. At room
temperature the reaction of propylene with HBr is much faster than the
reaction with ethylene.
Using reaction energy diagrams and your knowledge of carbocation
stability explain why this is so.
b) Xylene (dimethylbenzene) is a commonly used chemical in the printing
industry and as a cleaning solvent for oily waste. It is also used when
preparing histological samples to remove waxes from biological samples.
Draw the three possible structures for this compound and give the UPAC
names for each. Define which structures are ortho, meta, and para.


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