Using a 60 MHz spectrometer, the protons in dichloromethane appear at 5.30 ppm. When the same sample is placed in a 100 MHz instrument, where does the signal appear?
A) 8.33
B) 5.30
C) 3.18
D) cannot be determined from information given

Question

Quizplus · Accepted Answer

The chemical shift in NMR spectroscopy is independent of the spectrometer's frequency. It is a relative measurement compared to a standard reference, so the signal for dichloromethane's protons will still appear at 5.30 ppm regardless of the spectrometer's frequency.

Using a 60 MHz Spectrometer, the Protons in Dichloromethane Appear