Summary of Carbon Data

  1. Identify carbons from DEPT spectra
    2. Shift (ppm)Observed in SpectrumIdentity
    202.7 Observed in dept 90 CH
    131.6 Not observed in dept 45 C
    124.0 Observed in dept 90 CH
    50.9 Inverted in dept 135 CH2
    36.9 Inverted in dept 135 CH2
    27.7 Observed in dept 45 CH
    25.6 Not observed in dept 90, positive peak in dept 135 CH3
    25.4 Inverted in dept 135 CH2
    19.8 Not observed in dept 90, positive peak in dept 135 CH3
    17.6 Not observed in dept 90, positive peak in dept 135 CH3

  2. Total of 10 carbons, consistent with molecular formula

  3. Total of 18 hydrogens, consistent with molecular formula

  4. All hydrogens accounted for, consistent with aldehyde, ketone, or ether. Not an alcohol.

  5. Summary:
    1. 1 C
    2. 3 CH
    3. 3 CH2
    4. 3 CH3

  6. Now we know the pieces of the puzzle, however there are still many ways to combine these fragments into a molecular structure. Now we need to determine how to put these pieces together.