N-Ethylmaleimide(128-53-0) 1H NMR
Product NameN-Ethylmaleimide
CAS128-53-0
Molecular FormulaC6H7NO2
Molecular Weight125.13
InChIInChI=1S/C6H7NO2/c1-2-7-5(8)3-4-6(7)9/h3-4H,2H2,1H3
InChIKey HDFGOPSGAURCEO-UHFFFAOYSA-N
SmilesN1(CC)C(=O)C=CC1=O
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MassMS-NW-1962 N-ethylmaleimide C6H7NO2 (Mass of molecular ion: 125)
Source Temperature: 230 °C Sample Temperature: 180 °C Reservoir, 75 eV
15.0 4.4 25.0 1.6 26.0 24.2 27.0 8.1 28.0 9.2 29.0 2.4 39.0 1.5 40.0 2.6 41.0 3.0 42.0 9.5 43.0 1.0 44.0 5.8 52.0 1.4 53.0 7.1 54.0 30.2 55.0 9.0 56.0 10.8 68.0 1.0 69.0 2.9 70.0 2.1 71.0 1.1 80.0 4.5 82.0 22.9 83.0 1.2 96.0 4.8 97.0 1.2 98.0 1.4 110.0 100.0 111.0 5.8 124.0 1.5 125.0 49.2 126.0 3.5
parameter in CDCl3
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1H NMR 300 MHz C6 H7 N O2 10.6 mol% in CDCl3 N-ethylmaleimide 
Parameter ppm Hz
D(A) 6.715 D(B) 3.575 D(C) 1.190 J(B,C) 7.19
Hz ppm Int.2014.49 6.715 1000 1083.35 3.611 120 1076.17 3.587 368 1068.99 3.563 373 1061.81 3.539 128 364.16 1.214 378 356.99 1.190 752 349.81 1.166 363
in CDCl3
CCl4 solution
KBr disc
