1) The spectrum in Fig. 13.1 was taken on a 300 MHz NMR instrument. What is the chemical shift, in Hz, of the CH3 proton

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1) The spectrum in Fig. 13.1 was taken on a 300 MHz NMRinstrument. What is thechemical shift, in Hz, of the CH3 protons of dimethoxymethane in aspectrum takenon different instruments with the following applied magenticfields?21,100 gauss (b) 141,000 gauss

1 The Spectrum In Fig 13 1 Was Taken On A 300 Mhz Nmr Instrument What Is The Chemical Shift In Hz Of The Ch3 Proton 1 (79.71 KiB) Viewed 16 times

2) What is the chemical-shift difference in ppm oftwo resonances separated by 45 Hzat each of the following operating frequencies?(a) 60 MHz (b) 300 MHz

1 The Spectrum In Fig 13 1 Was Taken On A 300 Mhz Nmr Instrument What Is The Chemical Shift In Hz Of The Ch3 Proton 2 (51.88 KiB) Viewed 16 times

2400 absorption 8 2100 1800 7 1500 CH₂O-CH₂-OCH, 6 300 Hz chemical shift, Hz 1200 900 5 absorption of CH3 protons absorption of CH₂ protons 4 3 chemical shift, ppm (8) 600 300 chemical shift 83.35 or 1005 Hz chemical shift 6 4.56 or 1368 Hz 2 1 LAVA TMS 0 0
relative abundance 100 (a) relative abundance 80 (b) 60 40 20 0 100 80 60 40 20 0 10 20 30 40 50 60 10 20 30 45 40 70 80 90 100 110 120 130 140 mass-to-charge ratio m/z 59 50 60 70 80 90 100 110 120 130 140 mass-to-charge ratio m/z