Bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic acid dianhydride

Mass

MS2015-05172CW      
bicyclo(2.2.2)oct-7-ene-2,3,5,6-tetracarboxylic 2,3:5,6-dianhydride
C12H8O6             (Mass of molecular ion:    248)

   Source Temperature: 250 °C
   Sample Temperature:  20 °C
   Direct, 70 eV

      18.0       1.1
      26.0       1.6
      27.0       2.3
      28.0       1.3
      38.0       1.2
      39.0       6.6
      41.0       4.9
      43.0       3.9
      44.0       2.0
      50.0       4.4
      51.0      17.0
      52.0       9.5
      53.0       1.5
      54.0       2.5
      55.0       4.1
      56.0       2.7
      63.0       2.8
      65.0       1.3
      74.0       1.3
      75.0       1.1
      76.0       1.8
      77.0       8.2
      78.0     100.0
      79.0       6.9
      80.0       1.5
      81.0       3.6
      82.0       2.8
      83.0       1.3
      91.0       1.4
      98.0       8.4
      99.0       7.9
     100.0       1.4
     102.0       1.7
     103.0       8.4
     104.0      17.2
     105.0       1.9
     108.0       2.3
     126.0       2.3
     131.0      34.9
     132.0       3.8
     148.0       3.6
     176.0      66.6
     177.0       7.3
     204.0       3.4