9th Edition

ISBN: 9781305080485

Author: John E. McMurry

Publisher: Cengage Learning

Concept explainers

Ethers (R-O-R’) are compounds formed by replacing hydrogen atoms of an alcohol (R-OH compound) or a phenol (C6H5OH) by an aryl/ acyl group (functional group after removing single hydrogen from an aromatic ring). In this section, reaction, preparation and…

Epoxides

Epoxides are a special class of cyclic ethers which are an important functional group in organic chemistry and generate reactive centers due to their unusual high reactivity. Due to their high reactivity, epoxides are considered to be toxic and mutagenic…

Williamson Ether Synthesis

An organic reaction in which an organohalide and a deprotonated alcohol forms ether is known as Williamson ether synthesis. Alexander Williamson developed the Williamson ether synthesis in 1850. The formation of ether in this synthesis is an SN2 reaction…

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Textbook Question

Chapter 30.SE, Problem 14MP

Plastic photochromic sunglasses are based on the following reversible rearrangement of a dye inside the lenses that occurs when the lenses are exposed to sunlight. The original dye absorbs UV light but not visible light and is thus colorless, while the rearrangement product absorbs visible light and is thus darkened.

Chapter 30.SE, Problem 14MP, Plastic photochromic sunglasses are based on the following reversible rearrangement of a dye inside

(a) Show the mechanism of the rearrangement.

(b) Why does the rearrangement product absorb at a longer wavelength (visible light) than the original dye (UV)?

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Chapter 30.SE, Problem 13MP

Chapter 30.SE, Problem 15MP

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Chapter 30 Solutions

Organic Chemistry

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Solution Summary: The author proposes a mechanism for the conversion of colorless dye becoming dark when exposed to sunlight. The product has more extended conjugation than the reactant.

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