Show all the steps and labels for full credit. 8 Propose a structure for the following: C6H13Br. NMR (60MHz, TMS) 8 1.13 (s, 9H), 2.11 (t, 2H), 2.45 (t, 2H) ppm.
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- 7. Propose structures for compounds that fir the following ¹H NMR data: C4H6Cl₂ 2.18 8 (3H, singlet) 4.168 (2H, doublet) 5.71 8 (1H, triplet) C5H10O 0.95 8 (6H, doublet) 2.10 8 (3H, singlet) 2.43 8 (1H, multiplet) C10H14 1.30 8 (9H, singlet) 7.30 8 (5H, singlet)Determine the structure of the compound with the following spectral data. You must show your reasoning for full credit. (8pts) You must show your reasoning. MS: M+ (164) and M++2 in 1:1 ratio 1H-NMR: 3.5 (2H, triplet) 1.65 (2H, triplet) 0.9 (9H, singlet)4. Propose a structure for a compound, with molecular formula C5H₁1Cl, that fits the following spectroscopic data: 1H NMR: 0.98 (triplet, 3H), 1.3 8 (sextet, 2H), 1.5 8 (quartet, 2H), 1.6 8 (doublet, 3H), 3.68 (sextet, 1H) CI CI II CI r 4 t CH₂ CI CI III IV
- CHEM 241L. Exp#12 NMR Spectre 3. Compound 3 is a low boiling liquid (bp-58°C) that reacts with Br. in CCl. to form a 1,1,2,2 tetra-bromide. Elemental Analysis: C-48.36%, II - 4.06%; contains halogen "C Spectral Data: 80.4ppm (doublet), 68.3ppm (singlet), 34.7ppm (triplet) Mass Spectrom Absorbence Intonally 48 'H NMR Infrared Spectrom 4000 3000 2500 2000 74 70 80 90 100 110 120 130 140 150 160 170 100 mie Wave Number, cm .1 1300 1200 1100 1000 mon 1600 Wavelength, microne Compound 3 Structure PpinSignal A B с D E F Practice q # 7 7. The IR and the ¹H NMR spectra of an unknown with molecular formula of C8H₁5NO₂ are shown below. The questions that follow will guide you in the determination of its structure. 1925 26 27 28 29 8 (ppm) a. Determine the degree of unsaturation. Show your calculation. c. Analyze the ¹H NMR spectral data in the table below. Integral Multi- -tion plicity 3H 1.95 2.30 b. Analyze three significant bands in the IR spectra and conclude on the existing functions. 2.62 4.26 5.56 6.11 6H 2H F D 2H 1H 1H S S t t ㅁ d d C Comments B A d. Draw the final structure of the unknown in this box below. Final Structure 4/15Propose a structure for the following: CH 7.- IR: 1750 cm-¹ NMR 1.85 (t, 2H, J= 3.5 Hz) 1.92 (p, 2H, J = 3.5 Hz) 2.10 (s, 3H) 2.30 (t, 2H, J = 3.5 Hz) 7.10 (d, 2H) 7.25 (d, 2H) 9.34 (s, 1H) Show all steps
- 2. The ¹H NMR and ¹3C spectra of compound X (C8H₁0O) together with its IR spectrum are shown below. Propose a structure for X with explanations. 8 160 % Transmittance 100 50 ChemistrySteps.com 5H 7 140 120 5 1H 100 PPM 80 PPM 60 1H ChemistrySteps.com 40 3H Chemistry min 20 mm O17. Provide a structure that is consistent with the data below. C9H9N IR (cm-1): 1Η NMR (ppm): 13C NMR (ppm): 3050, 2950, 2240, 1630 7.5 (2H, doublet), 7.1 (2H, doublet), 2.3 (2H, quartet), 0.9 (3H, triplet) 137, 130, 126, 122, 95, 25, 158. Propose a structure for a compound, with molecular formula C8H1403, that fits the following spectroscopic data: IR: 1820cm-1, 1760cm-1 1H NMR: 1.0 6 (triplet, 6H), 1.6 5 (sextet, 4H), 2.2 6 (triplet, 4) مسلم ملله ملله > IV
- -38 (1H, multiplet) 4. How would you use ¹H NMR to distinguish between the following pairs of isomers? Selfosqe AMMO DAS and 5.718(IH, прес and 2114 tom gwollat pris to make que voy blow engi 5. Propose structure for compound with the following formula that show only one peak in its ¹H NMR sp C5H12A compound with molecular mass 114 and in IR spectrum, absorption bands are formed at 1770 cm¹ (s), 1650 cm-¹ (m) and 1200 cm¹ (w). In ¹H NMR six signals are observed, 8 1.0 (t, 3H), 1.7 (m 2H), 2.4 (t, 2H), 4.6 (d, 1H), 4.9 (d, 1H), 7.4 (d, 1H). Predict the molecular structure of the unknown compound and justify your answer.9. Propose a structure for a compound, with molecular formula CH,,03, that fits the following spectroscopic data: IR: 1820cm1, 1760cm1 'H NMR: 1.0 8 (triplet, 6H), 1.6 8 (sextet, 4H), 2.2 8 (triplet, 4H)