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- Transmittance (%) 100% 75% 50% 25% 0% 4000 3500 3000 OH 2500 2000 Spectrum 3B 1750 حسيمة 1500 Wavenumber (cm-¹) 1250 .OH 1000 OH 750 500a) Make A grouped frequency distribution of the data 4,16,32,52,56,62,73,81,83,88,94,100,102,110,138,152,165,173,176,184,186,202,204,207,209,223,229,238,248,249,262,264,270,272,279,281,285,287,293,296,305,309,314,320,321,323,337,353,356,360,362,366,371,373,381,393,395,398,403,407,418,419,426,429,433,434,435,444,446,447,450,451,469,486,508,513,521,522,524,529,533,538,544,551,554,558,560,561,562,572,596,607,609,621,624,652,657,660,677,695,701,702,712,713,718,724,726,740,750,764,765,766,773,778,781,785,786,795,816,857,861,864,873,874,876,885,888,894,899,900,901,912,913,918,920,933,941,944,945,957,961,962,965,969,972,982,983,990,991,996 b) Draw Histogram for the frequency distribution table made3. Th T 1001 90 80- 70- 60- 50- 40- 30- 20- 10- Transmittance 0- 50- 40- 30- 20- 10- zk 178 200.4 3500 39 41 50 51 125. 200 TB0 160 2H 2H ito ita Molecular Formula: C₁0H120 MW = 148 60 1H IN 3000 128.5 132.0 137.0 IR 128.0 2500 Wavenumber (cm-1) ¹HNMR 13 CNMR 2000 140 120 TOO 2H 60 1500 WALL Positive El Mass Spectrum 105 148 MA 120 133 91 40 50 60 70 80 90 100 110 120 130 140 150 160 MZ 40.4 1000 + 15 t 17.7 13.0 20 परं + + 134,1 परे 4 1324 5
- QUESTION 5 The IR, 'H NMR and 1°C NMR spectra of compound P are shown below. The molecular formula for compound P is CsH;NO2. Identify three (3) important absorption peaks on the IR spectrum and indicate the bond and wavenumber associated with each peak. Elucidate the structure of compound P and assign each peak in the 'H and 13C NMR spectra. (Hint: The compound consists of more than one functional group). а. b.1H 11 10 2H 2h 5 3H 3 An IR spectrum, a 13C NMR spectrum, and a ¹H NMR spectrum were obtained for an unknown structure. Draw the structure of this compound. 2 1 ppmSpectrum 28 100% 75%- 50%- 25% 0% 3500 2500 1750 1250 750 4000 3000 2000 1500 1000 50 Wavenumber (cm) NH2 Transmittance (%)
- 3500 3000 2500 Wavenumber cm-1 2000 1500 1000 500 3920.67 3082.32 2336.05 2235.94 1699.33 1655.52 1631.23 1407.26 1255.15 1189.54 1103.98 998.71 811.98 471.79 60 Transmittance [%] 80 70 90 fundamny BRUKER 100Transmittance (%) Transmittance (%) 100 50 4000 100 4000 3000 2000 1500 Wavenumber(cm¹) 1500 Wavenumber(cm¹) 1000 1000 500Potassium dichromate and potassium permanganate have overlapping absorptionspectra in 1M H2SO4 . K2Cr2O7 has an absorption maxima at 440 nm, and KMnO 4 has a band at 545nm (the maximum is actually at 525 nm, but the longer wavelength is generally used whereinterference from K2C2O7 is less). A mixture is analyzed by measuring the absorbance at these twowavelengths with the following results: A 440 =0.405, A 545 =0.712 in a 1-cm cell. The absorbances ofpure solutions of K2Cr2O7 (1x10 -3 M) and KMnO 4 (2.00x10 -4 M) in 1 M H 2 SO 4 , using the same cell gavethe following results: A Cr,440 = 0.374, A Cr,545 = 0.009, A Mn,440 =0.019, A Mn,545 = 0.475. Calculate theconcentrations of dichromate and permanganate in the sample solution.
- MASS % of Base Peak IR 100 5045 % Transmittance 100 T 50 4000 1540 ¹H NMR 300 MHz t 557 5.0 Hz 60 alla illle 677 69 1140 4.5 70 4.0 13C/DEPT NMR 75.5 MHz 3000 130 120 110 100 الد الله da 110 113 100 110 mm 817 Hz 500 90 80 m/z Wavenumber (cm-¹) 3.5 ми линия 80 90 480 Hz 957 3.0 70 2000 440 2.5 Hz 1450 2.0 -1126 120 1000 60 50 40 30 1287 130 1.5 ppm 20 ppmLrdocaine USP (ATR) 95- 90 85 80 75 70 65 60 55 50 45 Lidocaine 40 4000 3500 3000 2500 2000 1500 1000 Wavenumbers (cm-1) %Transmittance IZ 3243.36 3021.30 2968.47 2921.13 2799.39 1661.66 1593.98 1491.43, 1449.061 422.12,384.681371.62 1291.03264.55 1206.99 1165.931119.56 1091.78072.77. 1034.33 970.79986.39 917.91, 885.23 763.76 703.94 615.01599.90Chemistry Question