Proton-Proton Coupling -
  2JHH Alkenes (sp2)
  2JHH Saturated
  2JHH Saturated - 3-4 ring
  2JHH Saturated - 5 ring
  2JHH Saturated - 6 ring
  2JHH Saturated - 7-8 ring
  3JHH Acetylene
  3JHH Aldehyde
  3JHH Alkene
  3JHH Allylic
  3JHH Aromatic
  3JHH Dienylic
  3JHH Saturated - 3-4 ring (sp3)
  3JHH Saturated - 5 ring (sp3)
  3JHH Saturated - 6 ring (sp3)
  3JHH Saturated Acyclic (sp3)
  4J, 5J Aromatic Long Range Coupling
  4J, 5J: Dienylic Coupling
  4J,5J, 6J: "W" Coupling
  4J: Allylic Coupling
  4JHH - 9JHH: Long Range Acetylenic Couplings
  4JHH, 5JHH, 6JHH : Long Range Allenic Couplings
  4JHH: Long Range Benzylic Coupling
  5JHH: Long Range Homoallylic Couplings

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