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Chemistry LibreTexts

Upfield

[ "article:topic", "authorname:ggunawardena" ]
  • Page ID
    39892
  • The words upfield and downfield are used to compare chemical shifts of nuclei in molecules qualitatively.

     

     

    eg:

     

     

    The chemical shift of Hb is higher than that of Ha.  Thus, Hb appears downfield from Ha, or Ha appears upfield from Hb.

    see also shielded nucleus