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13 C - NMR

13 C - NMR. Baldur Gabríel Ragnheiðu r. 12 C & 13 C. 12 C - Massa- og nifteindatala slétt - I = 0  µ = 0  NMR óvirkt 13 C - 1,1 % - Massatala oddatala - I = ½  µ ≠ 0  NMR virkt

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13 C - NMR

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  1. 13C - NMR Baldur Gabríel Ragnheiður

  2. 12C & 13C • 12C - Massa- og nifteindatala slétt - I = 0 µ = 0  NMR óvirkt • 13C - 1,1 % - Massatala oddatala - I = ½  µ ≠ 0  NMR virkt - Ekki eins næmt og 1H-NMR

  3. 13C{1H} - Róf • Prótonum er frákúplað • Senditíðni ~63 MHz • Lífrænar sameindir - 0 til 250 ppm (TMS) • Flókið róf

  4. DEPT róf • Distortionless Enhancement by Polarization Transfer • Greinir á milli -CH,-CH2,-CH3 • Háð lengd prótonupúls (pulsewidth)

  5. Staðsetning C atómsá C-NMR

  6. C-NMR róf CH2eða CH LíklegaBensenhringur R-C-HnXX=O,Ph… CH3 C=C C=O

  7. Dept - 90 • Hérsjástbaravetnistengdkolefni Hérhvarftoppur => Klóróformleysir Toppurhvarf => EkkiAldehýð

  8. Dept-135 R-CH-O CH3 R-CH2-O CH2

  9. Ethyl-3-phenyl-3-hydroxy-propano-ate LeysirCDCl3

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