Mass

MS-NW-1338          
dimethyl acetylenedicarboxylate
C6H6O4              (Mass of molecular ion:    142)

   Source Temperature: 260 °C
   Sample Temperature: 180 °C
   Reservoir, 75 eV

      15.0      23.9
      24.0       2.2
      25.0       1.7
      26.0       1.6
      27.0       1.8
      28.0       4.4
      29.0       8.9
      30.0       2.3
      31.0       2.3
      37.0       1.1
      38.0       2.1
      39.0      36.9
      40.0       1.6
      45.0       1.7
      52.0      14.3
      53.0       6.5
      54.0       1.2
      59.0      15.0
      66.0       2.4
      68.0       1.4
      69.0       4.6
      80.0       9.5
      81.0       1.5
      82.0       3.2
      83.0       4.1
      84.0       5.7
      85.0       1.3
      98.0       8.0
     111.0     100.0
     112.0      16.4
     113.0       3.6
     142.0       1.4

Parameter ppm Hz D(A) 3.851

     Hz     ppm     Int.

   1155.30   3.851   1000