(E)-1-Methoxy-1-buten-3-yne

    Parameter     ppm  Hz

      D(A)         3.56
      D(B)         6.90
      D(C)         4.82
      D(D)         2.76
       J(A,B)          0.32
       J(A,C)          0.32
       J(A,D)          0.0
       J(B,C)         12.95
       J(B,D)          0.52
       J(C,D)          2.40
     
     LEQUAN,R.-M. & SIMONNIN,M.-P. COMPT.REND. 266C, 825 (1968)