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MassMS-NW-1226 crotonic anhydride C8H10O3 (Mass of molecular ion: 154)
Source Temperature: 260 °C Sample Temperature: 180 °C Reservoir, 75 eV
15.0 1.8 27.0 1.0 28.0 2.2 37.0 1.0 38.0 2.3 39.0 19.6 40.0 3.6 41.0 30.1 42.0 1.3 43.0 5.8 68.0 2.8 69.0 100.0 70.0 4.7 86.0 2.0 126.0 4.1
90 MHz in CDCl3
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1H NMR 89.56 MHz C8 H10 O3 0.04 ml : 0.5 ml CDCl3 crotonic anhydride 
Assign. Shift(ppm)
A 7.106 B 5.871 C 1.914 J(A,B)=15.5HZ J(A,C)=6.9HZ J(B,C)=-1.7HZ
Hz ppm Int.654.81 7.312 62 649.56 7.253 75 647.88 7.235 208 640.94 7.157 209 639.31 7.139 84 634.06 7.080 71 632.38 7.061 264 625.50 6.985 268 618.63 6.908 83 535.19 5.976 82 533.56 5.958 273 531.88 5.939 283 530.19 5.920 103 519.69 5.803 63 518.06 5.785 210 516.38 5.766 222 514.75 5.748 82 175.69 1.962 974 174.00 1.943 1000 170.25 1.901 69 168.75 1.885 964 167.06 1.866 988
in CDCl3
CCl4 solution
liquid film
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