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Octaphenylcyclotetrasiloxane

Product Name Octaphenylcyclotetrasiloxane

CAS546-56-5

MFC48H40O4Si4

MW793.18

¹³CNMR

Mass

MS-IW-0706          
octaphenylcyclotetrasiloxane
C48H40O4Si4         (Mass of molecular ion:    792)

   Source Temperature: 210 °C
   Sample Temperature: 240 °C
   Direct, 75 eV

      77.0       3.1
      78.0       1.6
     153.0       1.1
     154.0       3.6
     180.0       2.5
     181.0       2.0
     197.0       2.0
     202.0       1.5
     218.0       1.0
     219.0       1.4
     240.0       2.9
     240.5       1.7
     241.0      30.9
     241.5      14.2
     242.0       7.6
     242.5       2.2
     255.0       1.1
     257.0       2.8
     259.0       1.2
     271.0       1.5
     279.0       8.0
     279.5       6.1
     280.0      27.7
     280.5      14.4
     281.0       7.2
     281.5       2.3
     317.0       1.9
     317.5       1.1
     318.0       3.3
     318.5       2.2
     319.0       2.2
     357.0       2.5
     358.0       1.6
     359.0       1.1
     393.0       1.6
     435.0       1.2
     437.0       4.7
     438.0       2.0
     439.0       8.5
     440.0       3.5
     441.0       1.5
     481.0       2.8
     482.0       2.1
     483.0       4.7
     484.0       2.2
     485.0       1.4
     557.0       4.6
     558.0      13.1
     559.0      83.7
     560.0      57.0
     561.0      33.9
     562.0      13.4
     563.0       5.2
     564.0       1.7
     635.0      13.0
     636.0      23.1
     637.0     100.0
     638.0      70.2
     639.0      36.5
     640.0      14.3
     641.0       4.4
     642.0       1.2
     713.0      10.2
     714.0      43.1
     715.0      48.1
     716.0      28.1
     717.0      12.4
     718.0       4.3
     719.0       1.2
     792.0      14.9
     793.0      10.8
     794.0       6.1
     795.0       2.4

400 MHz in CDCl3

¹H NMR	399.65 MHz
C₄₈ H₄₀ O₄ Si₄	0.040 g : 0.5 ml CDCl₃
octaphenylcyclotetrasiloxane

    Assign.     Shift(ppm)

      A             7.460
      B             7.319
      C             7.160

     Hz     ppm     Int.

   2986.69   7.474    644
   2985.23   7.470    827
   2982.30   7.463    124
   2980.47   7.458    296
   2978.64   7.454    913
   2977.17   7.450    820
   2934.69   7.344    135
   2933.35   7.340    245
   2931.88   7.337    146
   2927.61   7.326    185
   2926.64   7.324    271
   2925.78   7.321    558
   2924.93   7.319    246
   2924.07   7.317    200
   2922.12   7.312     42
   2919.68   7.306    229
   2918.33   7.303    382
   2916.87   7.299    200
   2868.90   7.179    622
   2867.19   7.175    295
   2861.45   7.160    911
   2860.72   7.159   1000
   2854.98   7.144    209
   2853.88   7.141    423
   2853.39   7.140    432

in CDCl3

KBr disc

nujol mull

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