2,4-Selenophenedicarbaldehyde

    Parameter     ppm  Hz

      D(A)         8.578
      D(B)         9.725
      D(C)  *1     9.907
      D(D)  *1     9.867
       J(A,B)          1.40
       J(A,C)          0.24
       J(A,D)          0.3
       J(B,C)          1.1
       J(B,D)          0.0
       J(C,D)          0.0
     
     SIMONNIN,M.P. ET AL. ORG.MAGN.RESON. 8, 508 (1976)
     J(A,C) AND J(A,D) ARE ABSOLUTE VALUES.
     J(A,SE-77):4.8HZ. J(B,SE-77):41.14HZ. J(C,SE-77):7.85HZ.