Organic Chemistry (9th Edition)
Organic Chemistry (9th Edition)
9th Edition
ISBN: 9780321971371
Author: Leroy G. Wade, Jan W. Simek
Publisher: PEARSON
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Chapter 19, Problem 19.57SP

An unknown compound shows a weak molecular ion at m/z 87 in the mass spectrum, and the only large peak is at m/z 30. The IR spectrum follows. The proton NMR spectrum shows only three singlets: one of area 9 at δ0.9, one of area 2 at δ1.0, and one of area 2 at δ2.4. The singlet at δ1.0 disappears on shaking with D2O. Determine the structure of the compound, and show the favorable fragmentation that accounts for the ion at m/z 30.

Chapter 19, Problem 19.57SP, An unknown compound shows a weak molecular ion at m/z 87 in the mass spectrum, and the only large

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A hydrocarbon, compound B, has molecular formula C6H6, and gave an NMR spectrum with two signals: delta 6.55 pm and delta 3.84 pm with peak ratio of 2:1. When warmed in pyridine for three hr, compound B quantitatively converts to benzene. Mild hydrogenation of B yielded another compound C with mass spectrum of m/z 82. Infrared spectrum showed no double bonds; NMR spectrum showed one broad peak at delta 2.34 ppm. With this information, address the following questions. a) How many rings are in compound C? b) How many rings are probably in B? How many double bonds are in B? c) Can you suggest a structure for compounds B and C? d) In the NMR spectrum of B, the up-field signal was a quintet, and the down field signal was a triplet. How must you account for these splitting patterns?
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Chapter 19 Solutions

Organic Chemistry (9th Edition)

Ch. 19.10B - Propose a mechanism for nitration of pyridine at...Ch. 19.10B - Prob. 19.12PCh. 19.10C - Prob. 19.13PCh. 19.10C - Prob. 19.14PCh. 19.11 - Propose a mechanism to show the individual...Ch. 19.11 - Prob. 19.16PCh. 19.12 - Give the products expected from the following...Ch. 19.13 - Prob. 19.18PCh. 19.13 - Prob. 19.19PCh. 19.14 - Prob. 19.20PCh. 19.15 - Prob. 19.21PCh. 19.15 - Prob. 19.22PCh. 19.16 - Prob. 19.23PCh. 19.17 - Prob. 19.24PCh. 19.17 - Prob. 19.25PCh. 19.18 - Prob. 19.26PCh. 19.19 - Prob. 19.27PCh. 19.20A - Addition of one equivalent of ammonia to...Ch. 19.20A - Prob. 19.29PCh. 19.20B - Show how you would accomplish the following...Ch. 19.20C - Prob. 19.31PCh. 19 - For each compound, 1. classify the...Ch. 19 - Prob. 19.33SPCh. 19 - Within each structure, rank the indicated...Ch. 19 - In each pair of compounds, select the stronger...Ch. 19 - Which of the following compounds are capable of...Ch. 19 - Complete the following proposed acid-base...Ch. 19 - Predict the products of the following reactions:...Ch. 19 - Prob. 19.39SPCh. 19 - Show how m-toluidine can be converted to the...Ch. 19 - The mass spectrum of tert-butylamine follows shows...Ch. 19 - Prob. 19.42SPCh. 19 - The following drugs are synthesized using the...Ch. 19 - Prob. 19.44SPCh. 19 - Synthesize from benzene. (Hint: All of these...Ch. 19 - Propose mechanisms for the following reactions.Ch. 19 - Prob. 19.47SPCh. 19 - Prob. 19.48SPCh. 19 - Prob. 19.49SPCh. 19 - Show how you can synthesize the following...Ch. 19 - Prob. 19.51SPCh. 19 - The alkaloid coniine has been isolated from...Ch. 19 - A chemist is summoned to an abandoned...Ch. 19 - Pyrrole undergoes electrophilic aromatic...Ch. 19 - Prob. 19.55SPCh. 19 - Prob. 19.56SPCh. 19 - An unknown compound shows a weak molecular ion at...Ch. 19 - A compound of formula C11H16N2 gives the IR,...Ch. 19 - (A true story.) A drug user responded to an ad...Ch. 19 - Prob. 19.60SPCh. 19 - Prob. 19.61SPCh. 19 - Prob. 19.62SPCh. 19 - Prob. 19.63SPCh. 19 - Prob. 19.64SPCh. 19 - Prob. 19.65SP
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