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MassMS-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
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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
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