1,6-二氧杂螺[4.4]壬烷-2,7-二酮

Mass

MS-IW-0083          
1,6-dioxaspiro(4.4)nonane-2,7-dione
C7H8O4              (Mass of molecular ion:    156)

   Source Temperature: 260 °C
   Sample Temperature: 150 °C
   Reservoir, 75 eV

      17.0       1.2
      18.0       6.0
      26.0       5.9
      27.0      16.1
      28.0      70.5
      29.0      10.2
      39.0       2.7
      41.0       2.9
      42.0      16.9
      43.0       4.1
      44.0       1.5
      45.0       1.5
      53.0       1.3
      54.0       3.4
      55.0      34.2
      56.0     100.0
      57.0      39.9
      58.0       1.6
      67.0       1.9
      69.0       2.5
      70.0      10.0
      73.0       4.0
      83.0       6.5
      84.0      16.2
      85.0       1.3
      97.0       2.6
     101.0      21.5
     111.0       2.2
     112.0      91.5
     113.0       6.2
     157.0       2.6

Assign. Shift(ppm) A *1 2.795 B *1 2.618 C *2 2.50 D *2 2.45

     Hz     ppm     Int.

   1137.94   2.848    203
   1128.05   2.823    533
   1120.12   2.803    352
   1118.41   2.799    311
   1110.23   2.779    630
   1100.71   2.755    445
   1059.81   2.652    290
   1056.15   2.643    374
   1051.51   2.632    387
   1047.85   2.622    439
   1041.87   2.607    166
   1038.57   2.599    195
   1033.45   2.586    252
   1030.15   2.578    297
   1015.99   2.543    194
   1007.45   2.521     51
   1006.10   2.518    143
   1002.20   2.508    807
    993.77   2.487   1000
    992.31   2.483    575
    990.48   2.479    568
    987.92   2.472     44
    984.25   2.463    792
    980.71   2.454    491
    976.81   2.445     95
    970.58   2.429    110
    966.92   2.420     57