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MassMS-NW-5071 2,5-dihydrofuran C4H6O (Mass of molecular ion: 70)
Source Temperature: 260 °C Sample Temperature: 190 °C Reservoir, 75 eV
14.0 1.8 15.0 3.5 18.0 1.9 25.0 1.0 26.0 4.3 27.0 12.2 28.0 3.7 29.0 18.8 31.0 2.7 37.0 5.9 38.0 11.4 39.0 83.7 40.0 26.5 41.0 100.0 42.0 77.0 43.0 3.6 44.0 2.5 50.0 1.7 51.0 1.3 68.0 3.5 69.0 26.2 70.0 91.3 71.0 5.6 72.0 1.7
400 MHz in CDCl3
90 MHz in CDCl3
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1H NMR 399.65 MHz C4 H6 O 0.05 ml : 0.5 ml CDCl3 2,5-dihydrofuran 
Assign. Shift(ppm)
A 5.89 B 4.63
Hz ppm Int.2359.38 5.904 39 2358.28 5.901 40 2356.81 5.898 55 2354.00 5.891 529 2351.32 5.884 70 2349.98 5.881 55 2348.75 5.878 50 1857.30 4.648 54 1856.32 4.645 56 1852.66 4.636 711 1851.68 4.634 1000 1848.27 4.625 95 1847.53 4.623 90 1842.90 4.612 28
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1H NMR 89.56 MHz C4 H6 O 0.04 ml : 0.5 ml CDCl3 2,5-dihydrofuran Assign. Shift(ppm)
A 5.885 B 4.636
Hz ppm Int.531.50 5.935 22 530.13 5.920 25 528.69 5.904 83 528.19 5.898 165 527.38 5.889 421 526.50 5.879 178 524.69 5.859 41 523.38 5.844 26 522.06 5.830 30 420.19 4.692 27 419.31 4.682 25 418.19 4.670 34 415.81 4.643 1000 414.94 4.634 938 412.56 4.607 51 411.38 4.594 30 410.63 4.585 27
in CDCl3
KBr disc
liquid film
4880 A,200 M,liquid
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