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General Chemistry Principles, Patterns, and Applications, 2011

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Both<br />

glyceraldehyde <strong>and</strong> glyceric acid are derivatives of biochemical intermediates in sugar<br />

metabolism.<br />

a. Is the conversion of glycerol to glyceric acid an oxidative process or a reductive process?<br />

b. How many of these compounds are chiral? Indicate any chiral centers with an asterisk.<br />

2. When exposed to light or heat, peroxides (ROOR) can undergo radical reactions. The first step is the<br />

dissociation of the peroxide into two alkoxy radicals. Each alkoxy radical then reacts with a species such as<br />

HBr to form an alcohol.<br />

a. Write chemical equations for these reactions.<br />

b. One of the products of the second step can react with an alkene to generate another<br />

radical. Show a chemical equation for this reaction, using ethylene as the alkene.<br />

c. The product of part (b) can then react with HBr to form two products. What are those<br />

products?<br />

d. Identify any propagation reactions in part (b) or part (c). Show all possible termination<br />

reactions.<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

2320

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