Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Chapter 9, Problem 37P
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A compound with the molecular formula shown below exhibits a
1H NMR spectrum with only one signal. Deduce the structure in each case.
(a) C5H10
What is the structure of the compound if M+ = 122, IR peaks 1500, 1600 and a strong peak near 3350 cm-1, the carbon-13 NMR shows six lines, the 1H-NMR spectrum is:
7.15 ppm (5H multiplet)
3.75 ppm (2H triplet)
2.75 ppm (2H triplet)
What is the structure of the compound with the formula C10H10O4, if it shows strong IR signal near 3050 and 1730 cm-1, the 1H-NMR spectrum shows only two signals, both singlets. One of them appears at 3.9 ppm with the relative integration value of 79 and the second one appears at 8.1 ppm with the relative integration of 52.
Chapter 9 Solutions
Organic Chemistry
Ch. 9 - Prob. 1PPCh. 9 - PRACTICE PROBLEM 9.2 What compound with molecular...Ch. 9 - PRACTICE PROBLEM 9.3
Using the method of Section...Ch. 9 - PRACTICE PROBLEM 9.4 How many signals would each...Ch. 9 - Prob. 5PPCh. 9 - Prob. 6PPCh. 9 - PRACTICE PROBLEM 9.7
The relative chemical shifts...Ch. 9 - Prob. 8PPCh. 9 - PRACTICE PROBLEM 9.9 Propose a structure for...Ch. 9 - PRACTICE PROBLEM 9.10
What is the dihedral angle...
Ch. 9 - PRACTICE PROBLEM 9.11 Draw the most stable chair...Ch. 9 - Prob. 12PPCh. 9 - PRACTICE PROBLEM 9.13 How many signals would you...Ch. 9 - Prob. 14PPCh. 9 - Prob. 15PPCh. 9 - Prob. 16PPCh. 9 - Prob. 17PPCh. 9 - PRACTICE PROBLEM 9.18
What are the expected ratios...Ch. 9 - Prob. 19PPCh. 9 - How many 1H NMR signals (not peaks) would you...Ch. 9 - How many 13C NMR signals would you predict for...Ch. 9 - Prob. 22PCh. 9 - Prob. 23PCh. 9 - Prob. 24PCh. 9 - Compound Q has the molecular formula C7H8. The...Ch. 9 - 9.26 Explain in detail how you would distinguish...Ch. 9 - Compound S (C8H16) reacts with one mole of bromine...Ch. 9 - A compound with molecular formula C4H8O has a...Ch. 9 - In the mass spectrum of 2, 6-dimethyl-4-heptanol...Ch. 9 - Prob. 30PCh. 9 - What are the masses and structures of the ions...Ch. 9 - Prob. 32PCh. 9 - Ethyl bromide and methoxybenzene (shown below)...Ch. 9 - 9.34 The homologous series of primary amines, ,...Ch. 9 - Propose a structure that is consistent with each...Ch. 9 - 9.36 Propose structures for compounds E and F....Ch. 9 - 9.37 Use the NMR and IR data below to propose a...Ch. 9 - 9.38 When dissolved in , a compound (K) with the...Ch. 9 - Compound T (C5H8O) has a strong IR absorption band...Ch. 9 - Prob. 40PCh. 9 - Deduce the structure of the compound that gives...Ch. 9 - Deduce the structure of the compound that gives...Ch. 9 - The 1H NMR spectrum of a solution of 1,...Ch. 9 - Acetic acid has a mass spectrum showing a...Ch. 9 - The 1H NMR peak for the hydroxyl proton of...Ch. 9 - The 1H NMR study of DMF (N, N-dimethylformamide)...Ch. 9 - 9.48 The mass spectra of many benzene derivatives...Ch. 9 - Prob. 49PCh. 9 - 1. Given the following information, elucidate the...Ch. 9 - Two compounds with the molecular formula C5H10O...
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- A 13C NMR spectrum of commercially available 2,4-pentanediol, shows five peaks at 23.3, 23.9, 46.5, 64.8, and 68.1 . Explain.arrow_forwardPropose a structure consistent with the following spectral data for a compound C8H18O2: IR: 3350 cm-1 1H NMR: 1.24 δ (12 H, singlet); 1.56 δ (4 H, singlet); 1.95 δ (2 H, singlet)arrow_forwardFollowing are 1H-NMR spectra for compounds G, H, and I, each with the molecular formula C5H12O. Each is a liquid at room temperature, is slightly soluble in water, and reacts with sodium metal with the evolution of a gas. (a) Propose structural formulas of compounds G, H, and I. (b) Explain why there are four lines between 0.86 and 0.90 for compound G. (c) Explain why the 2H multiplets at 1.5 and 3.5 for compound H are so complex.arrow_forward
- Treatment of 3,4-dibromohexane with strong base leads to loss of 2 equivalents of HBr and formation of a product with formula C6H10. Three products are possible. Name each of the three, and tell how you would use 1H and 13CNMR spectroscopy to help identify them. How would you use UV spectroscopy?arrow_forwardThe proton - decoupled 13C NMR of X (C6H3Br3) displayed only 2 signals. What is the element of unsaturation? Draw out the structure of Xarrow_forwardWhat is the structure of a compound of molecular formula C10H14O2 that shows a strong IR absorption at 3150–2850 cm-1 and gives the following 1H NMR absorptions: 1.4 (triplet, 6 H), 4.0 (quartet, 4 H), and 6.8 (singlet, 4 H) ppm?arrow_forward
- Predict the structure of the molecule with molecular formula C8 H10 O using given information about its 1H NMR, 13C NMR, and IR.arrow_forwardIdentify below compound from its spectral data. Molecular formula: C4H7N IR:2250 cm−1 1H NMR data:1.08 (triplet, 3 H), 1.70 (multiplet, 2 H), and 2.34 (triplet,2 H) ppmarrow_forwardFollowing are the IR, MS(EI), 1 H and 13C NMR for an unknown compound. a) Provide the structural formula for the unknown compound. b) Explain the IR, 1 H NMR and MS(EI) spectra based on the structure given in (a).arrow_forward
- Compound X (molecular formula C10H12O) was treated with NH2NH2,−OH to yield compound Y (molecular formula C10H14). Based on the 1H NMR spectra of X and Y given below, what are the structures of X and Y?arrow_forwardCompound C has a molecular ion in its mass spectrum at 146 and a prominent absorption in its IR spectrum at 1762 cm-1. C shows the following 1H NMR spectral data: 1.47 (doublet, 3 H), 2.07 (singlet, 6 H), and 6.84 (quartet, 1 H) ppm. What is the structure of C?arrow_forwardOn the basis of the molecular formula, 1H NMR data, and IR data provided, propose a consistent structure. Moleculal Formula: C2H3Cl31H NMR data: δ 3.95 (d, 2H), 5.77 (t, 1H)IR data: 2950 cm–1, and several peaks below 820 cm–1.arrow_forward
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