Ch_322a_6.04

Ch_322a_6.04 - Kinetics of Nucleophilic Substitution...

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Kinetics of Nucleophilic Substitution Reactions The S N 2 Reaction Methyl chloride reacts with hydroxide ion in a nucleophilic substitution reaction : substrate nucleophile product leaving group CH 3 Cl + HO - CH 3 OH + Cl - The rate of the reaction, which depends on experimental conditions such as temperature, solvent, and concentrations, can be measured by following the consumption of the reactants (CH 3 Cl or HO - ) or the appearance of the products (CH 3 OH or Cl - ) over time. The time dependence of the concentration of a reactant or product is determined by periodically analyzing the reaction mixture. A plot of these concentrations versus time gives either a growth or decay curve.
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Graphical Determination of Reaction Rates The progress of the chemical reaction is followed graphically. concentration, M time Decrease in reactant concentration. Increase in product concentration. At time = T, the concentration of a reactant is measured. The
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Ch_322a_6.04 - Kinetics of Nucleophilic Substitution...

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