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- 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 ppmIntensity (a.u.) 4000 3352 cm¹ 3500 3000 UNKNOWN B 1710 cm¹ 2000 1668 cm¹ 2500 Wavenumber (cm¹¹) 1500 1101 cm 1000 500
- 0.8 0.6 0.4 0.2 0.0 3000 2000 1000 Wavenumber (cm-1) ОН NH2 `NH2 A В C TransmitanceAttach the spectra for A and B compounds here and identify the functional groups by completing the table for A and B respectively. S of them! Group Group Frequency Intensity (cm-¹) A Frequency Intensity (cm-¹) B 1. Acohol 2. Aromatic ring 3. c = c stretching vibration 4 CH bend 5. Amine.6. C8H100 11 TRANSMITTANCE LOD HSP-04-492 0+ 10 4000 9 3000 8 5 7 6 : 5 ppm 2000 4 HAVENUMBERI-l 2: 2 1 3 1500 2 سهر 1 1000 0 500 200 T 180 CDS-06-431 DEPT-90 T 160 DEPT-135 140 120 100 لك -2 peaks u ppm 80 60 40 20 0
- ge - mylau X Homepage- Genera X Pearson MyLab and Mas X O MasteringChemistry X v JS CH15 2022 W - Ge X I2I JS CH12 2022 W Not X O https://session.masteringchemistry.com/myct/itemView?assignmentProblemID=187325178&offset=next ssigment e 16.50 - Enhanced - with Feedback and Hints Part A What mass"of ammonium chloride should you add to 2.60 L of a 0.155 mol L-1 NH, to obtain a buffer with a pH of 9.50? For ammonia, K =1.76 x 10-5 Express your answer in grams to two significant figures. > View Available Hint(s) m Submit Request Answer wide Feedback O Type here to search 5°C I 8. 立Transmittance (%) Transmittance (%) 100 50 4000 100 4000 3000 2000 1500 Wavenumber(cm¹) 1500 Wavenumber(cm¹) 1000 1000 500Alsorbance Absorbance Absorption Spectrum of CoCl,(aq) Beer's Law Plot of CoCl, at = 560 nm 045 05 04 03 y = 48571x+0j0038 02 200 300 400 T00 S00 005 01 Wavelength inm) Concentration (M) Figure 1: Absorption Profile for cobalt (II) chloride Figure 2: Cobalt (II) chloride standard curve (Beer's Law Plot)* www.ucirvine.instructre.com 2. Place an arrow at the maximum absorbance and extrapolate the wavelength max. Amax = (be sure to include the unit). 3. Determine by concentration of an unknown solution of cobalt (II) chloride having an absorbance of 0.25. Method 1: Extrapolation (mark the concentration on the plot) b. Method 2: Calculation (show your work) a. Life University CHM 111 March 2021
- The FTIR spectra below is probably... * % transmittance 100 80 60 40 20 Image adapted from https://sdbs.db.aist.go.jp wavenumber cm-1 0 4000 Methanol O Ethanol Acetic acid Phenol Benzoic acid 3000 2000 1500 spectra adaptations Dr Phil Brown 2020. 1000 1500 to 400 cm 1 fingerprint region 4001. 0,ll zain IQ O [Template] P. -> Homework (1): When a sample of 4-heptanone was irradiated for 150 s with 315nm radiation with a power output of 60 W under conditions of total absorption, it was found that 3.8 mmol C2H4 was formed, What is the quantum yield for the formation of ethene?The FTIR spectra below is probably...* 100 % transmittance 80 60 9 20 Image adapted from https://sdbs.db.aist.go.jp wavenumber cm-1 0 4000 Methanol Ethanol Acetic acid Phenol Benzoic acid 3000 * 2000 1500 spectra adaptations Dr Phil Brown 2020. 1000 1500 to 400 cm-1 fingerprint region 400