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MassMS-IW-0005 2,5-difluorobenzoic acid C7H4F2O2 (Mass of molecular ion: 158)
Source Temperature: 210 °C Sample Temperature: 160 °C Reservoir, 75 eV
18.0 2.9 28.0 1.0 31.0 2.1 37.0 1.3 45.0 3.0 50.0 3.6 56.0 1.5 57.0 3.3 61.0 2.4 62.0 4.2 63.0 21.7 64.0 1.5 68.0 3.3 69.0 1.9 70.5 3.3 74.0 2.8 75.0 1.8 81.0 3.0 82.0 2.5 83.0 1.0 87.0 1.1 88.0 2.5 92.0 1.4 93.0 3.3 94.0 7.7 101.0 1.0 110.0 2.8 112.0 3.0 113.0 46.6 114.0 6.6 130.0 1.5 138.0 3.3 139.0 1.0 141.0 100.0 142.0 7.8 158.0 88.4 159.0 6.8
400 MHz in CDCl3
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1H NMR 399.65 MHz C7 H4 F2 O2 0.033 g : 0.5 ml CDCl3 2,5-difluorobenzoic acid 
Assign. Shift(ppm)
A 11.6 B 7.719 C 7.296 D 7.171
Hz ppm Int.4641.80 11.615 69 3099.54 7.756 30 3093.87 7.742 558 3090.57 7.734 634 3088.37 7.728 640 3085.26 7.720 1000 3082.14 7.713 646 3079.94 7.707 619 3076.65 7.699 576 3070.97 7.685 31 3070.60 7.684 30 2929.38 7.330 317 2925.90 7.322 522 2922.24 7.312 596 2920.22 7.307 534 2918.57 7.303 623 2916.74 7.299 769 2915.28 7.295 458 2913.08 7.290 746 2909.60 7.281 699 2906.12 7.272 416 2904.47 7.268 549 2900.08 7.257 30 2882.31 7.213 35 2881.39 7.210 39 2877.00 7.199 631 2872.78 7.189 660 2867.29 7.175 844 2863.08 7.164 840 2858.13 7.152 480 2853.92 7.142 454
in CDCl3
KBr disc
nujol mull
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