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.

We will use the formula below:

Chemical shift in ppm = peak position in Hz (relative to TMS) /

spectrometer frequency in MHz.

a) 956Hz/200Hz = 4.78 ppm

b) (2.40E3) / 200Hz = 12 ppm

c) (1.97E3) / 200Hz = 9.85 ppm