Answer: A urethane linkage occurs when an alcohol adds
Chapter 21, Problem 21.136(choose chapter or problem)
A urethane linkage occurs when an alcohol adds across the carbonnitrogen double bond in an isocyanate: A O O O O O O B P P R R O O O H R R H C + C O N Alcohol Isocyanate Urethane Polyurethanes are formed from the copolymerization of a diol with a diisocyanate. Polyurethanes are used in foamed insulation and a variety of other construction materials. What is the structure of the polyurethane formed by the following reaction? HOCH2CH2OH + OPCP PCPO
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