The 1H NMR signal for bromoform (CHBr3) appears at 2065 Hz when recorded on a 300-MHz NMR spectrometer, (a) What is the chemical shift of this proton? (b) If the spectrum was recorded on a 400-MHz instrument, what would be the chemical shift of the CHBr3 proton? (c) How many hertz downfield from TMS is the signal when recorded on a 400-MHz instrument?
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