In a 300-MHz spectrometer, the protons in iodomethane absorb at a position 650 Hz down-field from TMS.
(a) What is the chemical shift of these protons?
(b) Determine the difference in the magnetic field required for resonance of the iodomethane protons compared with the TMS protons.
(c) What is the chemical shift of the iodomethane protons in a 60-MHz spectrometer?
(d) How many hertz downfield from TMS would they absorb at 60 MHz?
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