(1E,3E)-1,4-Dichloro-1,3-butadiene

    Parameter     ppm  Hz

      D(A)         6.170
      D(B)         6.333
       J(A,A')         0.83
       J(A,B)         13.12
       J(A,B')        -0.69
       J(A',B)        -0.69
       J(A',B')       13.12
       J(B,B')        11.24
     
     BOTHNER-BY,A.A. & HARRIS,R.K. J.AM.CHEM.SOC. 87, 3445 (1965)