The following 1H NMR absorptions were obtained on a spectrometer operating at 200 MHz and are given in Hz downfield from TMS. Convert the absorptions to δ units. a) 416 Hz = δ b) 1.97×103 Hz = δ c) 1.50×103 Hz = δ

For (a): The chemical shift is

For (b): The chemical shift is

For (c): The chemical shift is

Explanation:

To calculate the chemical shift, we use the equation:

Given value of spectrometer frequency = 200 MHz

Given peak position = 416 Hz

Putting values in above equation, we get:

Given peak position =

Putting values in above equation, we get:

Given peak position =

Putting values in above equation, we get:

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