Содержание
- 2. 1H NMR SPECTROSCOPY
- 3. Метод я́дерного магни́тного резона́нса (ЯМР) основан на взаимодействии внешнего магнитного поля) основан на взаимодействии внешнего магнитного
- 4. Сабақтың мақсаты: Ядролық магнитті резонанс әдісімен танысу ЯМР қарапайым спектрлерімен танысу
- 5. Тілдік терминология Ядролық магнитті резонанс -magnetic nuclear resonance- ядерно магнитный резонанс
- 6. Samples are dissolved in solvents free of 1H atoms, e.g. CCl4, CDCl3. A small amount of
- 7. Chapter 13 No. of Signals = No. of Environments =>
- 8. Intensity of Signals ∝ Number of H The area under each peak is proportional to the
- 9. How Many Hydrogens? When the molecular formula is known, each integral rise can be assigned to
- 10. In a spectrum, there is one signal for each set of equivalent H atoms. В спектре
- 11. 2 sets of equivalent H’s: ratio 6:2 (3:1) 4 sets of equivalent H’s: ratio 3:1:2:3 5
- 12. For each of the following compounds, predict the number of signals and the relative intensity of
- 13. methylpropene propene 2-chloropropane propanone methylamine ethyl propanoate
- 14. 2 signals: ratio 6:2 (3:1) 3 signals: ratio 2:1:3 2 signals: ratio 6:1 1 signal 2
- 15. 1,2-dibromopropane dimethylethyl propanoate but-2-ene
- 16. 3 signals: ratio 2:1:3 2 signals: ratio 6:2 (3:1) 3 signals: ratio 3:2:9 1,2-dibromopropane dimethylethyl propanoate
- 17. RELATIVE INTENSITY There are four signals here – each has the same area and so represents
- 18. Integral given as number/ratio of H
- 19. CHEMICAL SHIFT
- 20. What are the frequencies of these Hs?
- 21. What are the frequencies of these Hs?
- 22. What are the frequencies of these Hs?
- 23. 0 H next door singlet (s) 1 H next door doublet (d) 2 H next door
- 24. SPIN-SPIN COUPLING
- 25. Splitting for 3,methylpropan-2-one
- 26. Number of H’s next door +1 But you don’t couple to H’s that are equivalent H’s
- 27. Hydroxyl Proton Ethanol with a small amount of acidic or basic impurities will not show splitting.
- 28. Explain the splitting patterns
- 30. Explain the splitting patterns
- 32. Explain the splitting patterns
- 34. Hydroxyl Proton Arises because the H on the OH, rapidly exchanges with protons on other molecules
- 36. Identifying the O-H or N-H Peak Chemical shift will depend on concentration and solvent. To verify
- 38. Number of signals Position of signals Relative intensities Splitting how many different sets of equivalent H
- 39. For each of the following compounds, predict the number of signals, the relative intensity of the
- 40. 2 signals: ratio 6 : 2 (3 :1) s s 3 signals: ratio 2 : 1
- 41. 3 signals: ratio 2 : 1 : 3 d m d 2 signals: ratio 6 :
- 43. 13C NMR SPECTROSCOPY
- 44. 13C NMR spectra are often simpler than 1H NMR spectra. They give a lot of valuable
- 45. Data from AQA datasheet
- 46. Data from AQA datasheet
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