Question

1) A 'H NMR doublet appears at chemical shifts of 2.585 and 2.597 ppm. 1.1) If the coupling constant J12 for this doublet is 8.4 Hz, what is the frequency of the spectrometer? 1.2) What is the magnetic field strength for the spectrometer used in the previous question? 1.3) In this same magnetic field, what would be the resonant frequency for a bare SC nucleus (c = 6.726 x 107 rad s-1 T-1)? min ototo (lol and IAX) is given by the equation:

Answer 1

.J151-60) frequency of instrument (in HM2) So frequency of instrument (in H₂) = 8.4 Hz 2.597 - 2.585) ppm FooMHz. Bo 8 . gynomagnetic ratio Fog 8 = 267 . 53 X 100 radians / Tesla x sec.

Bo= Oxat 7 700 x 106 Hz X2 X3.14 267.83 x 100 radian / TX sect 16.437 = in da 18 x Bo 8 for c= 67.28 x 100 radion / Testa see? Iz 67.28 x 100 radian / Tesla sec X 16.43T 2x3 14 = 176.02 x 100 Hz 2176.02 MHz