The rate constants determined from the NMR and IR kinetics experiments are very close in value, but are not identical. The NMR determined rate constant was 0.0007831 1/s, which was slightly smaller/slower than the IR determined rate constant of 0.001245 1/s. While these two k values are meant be identical, their differences from lab can be attributed to specific factors as well. For example, temperature is a factor that can affect the rate constant. A reason for the NMR experiment is giving a smaller/slower rate constant could be due to the colder temperature in the basement of Hughes, which may have decreased the rate of the reaction and therefore produced a smaller k value.