2-Chloro-5-fluorothiophene

    Parameter     ppm  Hz

      D(A)         6.38
      D(B)         6.09
      D(X)        34.51
       J(A,B)          4.20
       J(A,X)          3.49
       J(B,X)          2.76
     
     RODMAR,S. ET AL. ACTA CHEM.SCAND. 25, 3309 (1971)
     F-19 REFERENCE:HEXAFLUOROBENZENE.