meso-2,3-dichlorobutane

    Parameter     ppm  Hz

      D(A)         1.600
      D(B)         3.912
       J(A,A')         0.0
       J(A,B)          6.45
       J(A,B')        -0.12
       J(A',B)        -0.12
       J(A',B')        6.45
       J(B,B')         7.39
     
     BOTHNER-BY,A.A. & NAAR-COLIN,C. J.AM.CHEM.SOC. 84, 743 (1962)