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Simple C-13 NMR query

  1. Dec 23, 2014 #1
    In 2-aminobutane, C3 resonates at lower field (ca 33ppm) compared to C1 (ca 23ppm). Is there a simple rationale for this? The extra inductive effect from C4 should increase electron density around C3 and so shift it upfield compared to C2? Any thoughts/answers greatly appreciated.
     
  2. jcsd
  3. Dec 23, 2014 #2

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    Steric effect between amine group and C4?
     
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