4,4'-Oxydiphthalic anhydride

Mass

MS-IW-4947          
4,4'-oxydiphthalic dianhydride
C16H6O7             (Mass of molecular ion:    310)

   Source Temperature: 170 °C
   Sample Temperature: 220 °C
   Direct, 75 eV

      18.0       3.3
      28.0       1.9
      37.0       1.0
      44.0       1.2
      50.0       1.0
      53.0       1.0
      61.0       1.3
      62.0       4.9
      63.0      10.4
      69.0       4.4
      73.0       1.1
      74.0      10.7
      75.0      25.3
      76.0       1.8
      83.0       2.6
      86.0       1.3
      87.0       1.5
      88.0       2.1
     103.0       2.0
     111.0      10.5
     111.5       1.5
     112.0       1.5
     137.0       5.6
     138.0       2.2
     166.0      16.3
     167.0       2.1
     194.0      40.6
     195.0       5.8
     238.0      13.0
     239.0       1.9
     266.0     100.0
     267.0      16.5
     268.0       2.4
     310.0      52.5
     311.0       9.2
     312.0       1.5

Assign. Shift(ppm) A 8.194 B 7.775 C 7.745

     Hz     ppm     Int.

   3279.54   8.207    727
   3279.17   8.206    721
   3276.12   8.198     48
   3275.02   8.195     51
   3271.36   8.186    796
   3270.87   8.185    793
   3108.28   7.778    765
   3106.57   7.774   1000
   3103.03   7.765     84
   3100.22   7.758    728
   3097.90   7.752    456
   3091.92   7.737    618
   3089.72   7.732    479