¹³ C NMR is, generally speaking, a huge waste of time. This isn’t meant to be an attack on carbon NMR as a scientific tool; it’s an excellent technique, and gives structural information that no other methods can. Rather, I take issue with the requirement that the identity of every published compound be verified with a ¹³ C NMR spectrum. Very few ¹³ C NMR experiments yield unanticipated results.