The coupling constant (J) for bromoethane is 7 Hz when the ¹H NMR spectrum is acquired at 250 MHz. What is the coupling constant between these protons when the spectrum is acquired at 500 MHz?

Question

Quizplus · Accepted Answer

The coupling constant (J) is independent of the magnetic field strength used in NMR spectroscopy. Therefore, it remains the same (7 Hz) regardless of whether the spectrum is acquired at 250 MHz or 500 MHz.

The Coupling Constant (J) for Bromoethane Is 7 Hz When