4H-Thiopyran-4-one

    Parameter     ppm  Hz

      D(A)         7.889
      D(B)         7.091
       J(A,A')         4.06
       J(A,B)         10.40
       J(A,B')         0.48
       J(A',B)         0.48
       J(A',B')       10.40
       J(B,B')         1.97
     
     BROWN,N.M.D. & BLADON,P. SPECTROCHIM.ACTA 21, 1277 (1965)