The ¹H NMR spectrum of bromoethane shows a signal at 3.5 ppm when the spectrum is recorded using a 60 MHz spectrometer. Where do you expect to see the signal if a 300 MHz instrument is used instead?

Question

Quizplus · Accepted Answer

The chemical shift in NMR spectroscopy is independent of the spectrometer's frequency. It is a relative measurement and is expressed in parts per million (ppm), so it remains the same regardless of whether a 60 MHz or a 300 MHz instrument is used.

The 1H NMR Spectrum of Bromoethane Shows a Signal at 3.5

The ¹H NMR Spectrum of Bromoethane Shows a Signal at 3.5