Question

11.4 Pre-lab questions 1) Predict the 'H-NMR chemical shift (ppm) using empirical parameter (Curphy-Morrison) values, coupling pattern, and approximate J value (Hz) of each of the 'H-atoms present in an possible mono-nitrated bromobenzenes as shown in the table below. Use the H-atom labeling key provided on page 11-9. (3 pts) Ho HV Hi HY NOZ HO HY NO2 shift, coupling pattern, and J value O NYH Hm shift, coupling pattern, and J value shift, coupling pattern, and J value Hh H/HP Hm/Hm H

Answer 1

399.65 MHz 0.041 g 0.5 ml CDCI, 3 5 2 0 4 3 1 ppm HSP-42-256 NO2 (A) H Br D) H HB H(C 标记氢 化学位移(ppm) 7.836 7.744 7.47 7.45 90MHZ HSP-04-312 Int Hz ppm 7.851 3137.45 592 3135.13 7.845 622 3130.49 7.834 404 7.831 3129.52 499 7.827 3127.69 726 3099.85 7.757 666 3098.14 7.753 514 3097.29 7.751 505 3092.53 7.739 713 3090.45 7.733 851 2997.07 7.500 201 2995.36 7.495 301 2989.62 7.481 700 2987.92 7.477 781 2984.25 7.468 734 892 7.463 2982.54 1000 2981.81 7.462 7.458 2980.35 785 7.449 731 2976.68 693 2974.61 7.444 2969.12 7.430 261 2967.16 7.425 207 ABCD - 00

89.56 MHz 0.075 g 0.5 ml CDCI OCl 11 10 9 6 4 3 2 0 ppm HSP-00-360 NO2 B) H H (A D) H Br H(C 标记氢 化学位移(ppm) 8.378 A 8.176 В 7.834 C 7.458 Int Hz ppm 752.63 8.404 464 750.44 8.380 1000 748.63 8.359 665 8.244 738.25 393 737.13 8.231 426 8.218 736.00 312 8.207 734.94 315 730.06 8.152 448 8.140 729.00 518 727.94 8.128 410 726.81 8.116 394 707.88 7.904 354 706.69 7.891 412 7.883 706.00 351 7.870 704.81 336 7.815 699.88 589 698.75 7.803 583 7.794 602 698.00 7.782 696.88 482 7.535 674.75 769 998 666.63 7.444 7.355 658.63 403

89.56 MHz SDBS H NMRSDBS No. 2339HSP-04-286 CoH, Br NO2 0.041 g: 0.5 ml CDCI p-bromonitrobenzene 11 10 7 6 4 3 1 0 ppm HSP-04-286 HIA В)Н -N02 Вг B) H HIA) Assign Shift (ppm) 8.096 A 7.694 в J (A, B) 9 1HZ