text: N NMR has complications not encountered in H and C NMR spectroscopy. The 0.36% natural abundance of N results in a major sensitivity penalty.  Sensitivity is made worse by its low gyromagnetic ratio (γ = −27.126 × 10 Ts), which is 10.14% that of H.  The signal-to-noise ratio for H is about 300-fold greater than N at the same magnetic field strength.