(1E,3E)-1,3-Butadiene-1,4-dicarbonitrile

    Parameter     ppm  Hz

      D(A)         5.72
      D(B)         7.03
       J(A,A')         1.4
       J(A,B)         16.5
       J(A,B')        -1.0
       J(A',B)        -1.0
       J(A',B')       16.5
       J(B,B')        10.3
     
     HALL,J.H. & PATTERSON,E. J.AM.CHEM.SOC. 89, 5856 (1967)