2-Fluoro-4-iodothiophene

    Parameter     ppm  Hz

      D(A)         6.63
      D(B)         6.37
      D(X)        33.25
       J(A,B)          1.85
       J(A,X)          3.13
       J(B,X)          0.61
     
     RODMAR,S. ET AL. ACTA CHEM.SCAND. 25, 3309 (1971)
     F-19 REFERENCE:HEXAFLUOROBENZENE.