2,4-diacetyl-3-oxoglutaric anhydride(33524-89-9) MS
Product Name2,4-diacetyl-3-oxoglutaric anhydride
CAS33524-89-9
Molecular FormulaC9H8O6
Molecular Weight212.16
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MassMS-NW-8799 3,5-diacetyltetrahydropyran-2,4,6-trione C9H8O6 (Mass of molecular ion: 212)
Source Temperature: 180 °C Sample Temperature: 110 °C Direct, 75 eV
15.0 3.8 18.0 3.5 27.0 2.5 28.0 3.2 29.0 1.5 38.0 1.0 39.0 2.8 41.0 1.8 42.0 4.2 43.0 100.0 44.0 3.7 45.0 1.1 53.0 2.6 55.0 3.3 61.0 5.1 66.0 1.5 67.0 5.7 68.0 1.4 69.0 13.3 72.0 1.2 82.0 1.6 84.0 6.0 85.0 4.2 87.0 1.9 96.0 1.4 98.0 1.2 110.0 1.4 111.0 13.3 113.0 1.1 122.0 2.3 124.0 10.0 125.0 1.8 129.0 4.8 138.0 2.9 142.0 2.2 151.0 13.8 152.0 2.0 153.0 1.1 166.0 29.2 167.0 2.7 168.0 2.0 179.0 28.2 180.0 2.5 184.0 2.1 194.0 34.5 195.0 3.6 197.0 17.2 198.0 1.5 212.0 38.2 213.0 5.0
90 MHz in CDCl3
90 MHz in DMSO-d6
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1H NMR 89.56 MHz C9 H8 O6 0.028 g : 0.5 ml CDCl3 3,5-diacetyltetrahydropyran-2,4,6-trione 
Assign. Shift(ppm)
A *1 19.00 B *1 16.3 C *2 2.767 D *2 2.683
Hz ppm Int.1701.41 18.998 133 1460.89 16.312 36 255.46 2.853 28 255.13 2.849 32 253.60 2.832 48 247.88 2.768 1000 240.40 2.685 784 232.16 2.593 39 231.50 2.585 36 230.73 2.577 31 230.18 2.571 30
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1H NMR 89.56 MHz C9 H8 O6 0.041 g : 0.5 ml DMSO-d6 3,5-diacetyltetrahydropyran-2,4,6-trione Assign. Shift(ppm)
A 9.61 B 2.422
Hz ppm Int.860.67 9.610 114 217.02 2.424 1000 212.62 2.375 31
in CDCl3
KBr disc
nujol mull
