1,1,3,3-tetrafluoroacetone

    Parameter     ppm  Hz

      D(A)         6.224
      D(X)      -130.0
       J(A,A')        -0.19
       J(A,X)         52.10
       J(A,X')        52.10
       J(A,X'')        0.72
       J(A,X''')       0.72
       J(A',X)         0.72
       J(A',X')        0.72
       J(A',X'')      52.10
       J(A',X''')     52.10
       J(X,X')         0.00
       J(X,X'')        8.14
       J(X,X''')       3.08
       J(X',X'')       3.08
       J(X',X''')      8.14
       J(X'',X''')
                       0.00
     
     SHAPIRO,B.L. ET AL. J.MAGN.RESON. 11, 355 (1973)
     F-19 REFERENCE:CFCL3.