Thiophene-2-carboxylic acid fluoride

    Parameter     ppm  Hz

      D(A)         7.973
      D(B)         7.387
      D(C)         8.064
      D(D)        23.282
       J(A,B)          3.88
       J(A,C)          1.22
       J(A,D)          0.2
       J(B,C)          4.88
       J(B,D)          1.99
       J(C,D)          2.44
     
     SCHAUMBURG,K. CAN.J.CHEM. 49, 1146 (1971)
     J(A,X):LESS THAN 0.2HZ. F-19 REFERENCE:CFCL3.