Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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NMR Spectroscopy
NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra o…
Question
Question 16
Both pyridine and pyrrole are nitrogen- containing aromatic heterocyclic compounds (see below). When treated with HCI, pyridine forms a hydrochloride salt, whereas pyrrole is unreactive. Provide an explanation for this observed difference in reactivity. Pyridine (pK8.77) Select one: Pyrrole (pK 17.8) = A. The pyrrole nitrogen is a strongly deactivating group. B. Pyrrole has a large bond angle strain, preventing it from reacting. O C. Reaction of pyrrole with HCl forms an unstable nitrogenous anion.
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Transcribed Image Text:Both pyridine and pyrrole are nitrogen- containing aromatic heterocyclic compounds (see below). When treated with HCI, pyridine forms a hydrochloride salt, whereas pyrrole is unreactive. Provide an explanation for this observed difference in reactivity. Pyridine (pK8.77) Select one: Pyrrole (pK 17.8) = A. The pyrrole nitrogen is a strongly deactivating group. B. Pyrrole has a large bond angle strain, preventing it from reacting. O C. Reaction of pyrrole with HCl forms an unstable nitrogenous anion.
Pyridine (pK8.77) Select one: Pyrrole (pK 17.8) A. The pyrrole nitrogen is a strongly deactivating group. B. Pyrrole has a large bond angle strain, preventing it from reacting. C. Reaction of pyrrole with HCl forms an unstable nitrogenous anion. O D. Pyrrole is sterically hindered; pyridine is not. O E. Protonation of pyrrole destroys a stable aromatic ring, while protonation of pyridine does not disrupt its aromaticity. OF. pyrdine is planar while pyrrole is not.
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Transcribed Image Text:Pyridine (pK8.77) Select one: Pyrrole (pK 17.8) A. The pyrrole nitrogen is a strongly deactivating group. B. Pyrrole has a large bond angle strain, preventing it from reacting. C. Reaction of pyrrole with HCl forms an unstable nitrogenous anion. O D. Pyrrole is sterically hindered; pyridine is not. O E. Protonation of pyrrole destroys a stable aromatic ring, while protonation of pyridine does not disrupt its aromaticity. OF. pyrdine is planar while pyrrole is not.
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