Ethylene sulfoxide

    Parameter     ppm  Hz

      D(A)         2.42
      D(B)         1.92
       J(A,A')        11.72
       J(A,B)         -6.47
       J(A,B')        10.55
       J(A',B)        10.55
       J(A',B')       -6.47
       J(B,B')        11.51
     
     OHTSUKA,M. ET AL. TETRAHEDRON LETT. 33, 2877 (1970)