Analysis of the N.M.R. spectrum of pyrrole

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Abstract
By the N-decoupling technique the signal of the N-H proton in pyrrole was clearly unveiled. Using the full spectrum, including the N-H band, the N.M.R. parameters for all five protons of the system were accurately determined. Assuming an AA′BB′X system, a computer simulation was performed; assignments were made for the observed lines. Based on the assignments, the N.M.R. parameters were determined with high accuracy by an iteration method. By using a partial decoupling experiment, the relative signs of the coupling constants between the N-H proton and the ring protons were determined to be the same.