The results of the two experiments can then be compared to assess whether the two techniques are in agreement. In the example data, the anhydride decomposition rate constants were determined to be k = 5.4 × 10 -2 min -1 from NMR spectroscopy and 7.3 × 10 -2 min -1 from IR spectroscopy. These values are in good agreement, with the discrepancy likely resulting from differences in ambient temperature between the NMR and IR spectrometers.