4-Fluoro-2-thiophenecarbaldehyde

    Parameter     ppm  Hz

      D(A)         7.11
      D(B)         7.44
      D(C)         9.75
      D(X)        36.97
       J(A,B)          1.73
       J(A,C)          1.29
       J(A,X)          0.58
       J(B,C)         -0.14
       J(B,X)         -0.99
       J(C,X)          0.57
     
     RODMAR,S. ET AL. ACTA CHEM.SCAND. 25, 3309 (1971)
     F-19 REFERENCE:HEXAFLUOROBENZENE.