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
Posted: Sun Jul 03, 2022 12:37 pm
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
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
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
- 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 17 times
- 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 17 times
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