Essential Organic Chemistry, Global Edition
3rd Edition
ISBN: 9781292089034
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 15.8, Problem 20P
Explain why, when a small amount of glycerol is added to the reaction mixture of toluene- 2,6–diisocyanate and ethylene glycol during the synthesis of polyurethane foam, a much stiffer foam is obtained.
glycerol
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Chapter 15 Solutions
Essential Organic Chemistry, Global Edition
Ch. 15.2 - Prob. 1PCh. 15.2 - Prob. 2PCh. 15.2 - Prob. 3PCh. 15.2 - Prob. 4PCh. 15.2 - List the following groups of monomers in order...Ch. 15.2 - List the following groups of monomers in order...Ch. 15.2 - Prob. 7PCh. 15.2 - Why does methyl methacrylate not undergo cationic...Ch. 15.2 - Which monomer and which type of initiator would...Ch. 15.2 - Prob. 10P
Ch. 15.2 - Prob. 11PCh. 15.5 - Draw a short segment of gutta-percha.Ch. 15.5 - Prob. 13PCh. 15.6 - Prob. 14PCh. 15.8 - Prob. 15PCh. 15.8 - Prob. 16PCh. 15.8 - Prob. 17PCh. 15.8 - a. Propose a mechanism for the formation of the...Ch. 15.8 - Propose a mechanism for the formation of Melmac.Ch. 15.8 - Explain why, when a small amount of glycerol is...Ch. 15.10 - Prob. 21PCh. 15 - Draw short segments of the polymers obtained from...Ch. 15 - Prob. 23PCh. 15 - Draw the structure of the monomer or monomers used...Ch. 15 - Draw short segments of the polymers obtained from...Ch. 15 - Prob. 26PCh. 15 - Prob. 27PCh. 15 - Prob. 28PCh. 15 - A particularly strong and rigid polyester used for...Ch. 15 - Prob. 30PCh. 15 - Prob. 31PCh. 15 - Prob. 32PCh. 15 - Prob. 33PCh. 15 - Prob. 34PCh. 15 - Prob. 35PCh. 15 - Delrin (polyoxymethylene) is a tough...
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- Describes the procedure for discarding Isoflurane after using it.arrow_forwardwrite the mechanism with which toluene reacts with acetylchloride in the presence of aluminum trichloride. What is the name of this reaction?arrow_forwardExplain why, when a small amount of glycerol is added to the reaction mixture of toluene-2,6-diisocyanate and ethylene glycol during the synthesis of polyurethane foam, a much stiffer foam is obtained.arrow_forward
- Restate the paragraph. The main objective of the laboratory activity was to make aspirin also known as acetylsalicylic acid in its scientific name. It was successfully done as aspirin was synthesized using the combination of salicylic acid and acetic anhydride. In this reaction, salicylic acid's hydroxyl group on the benzene ring interacted with acetic anhydride to generate an ester functional group. This is an esterification reaction that produces acetylsalicylic acid. Sulfuric acid was utilized as a catalyst to start the esterification reaction. Some unreacted acetic anhydride and salicylic acid, as well as sulfuric acid, aspirin, and acetic acid, remained in the solution after the reaction was completed. The process of crystallization was used to obtain pure crystals of a substance from an impure mixture. Upon completion of the lab, analysis, and calculations, , it is evident that the synthesis of aspirin is possible using these methods but that the yield will be relatively lowarrow_forwardExplain why the addition of a small amount of glycerol to the polymerization mixture gives a stiffer urethane foam.arrow_forwardThink about what kind of compound can be obtained when D2O is mixed in ethyl benzoate.arrow_forward
- Draw the structural formula(s) for the organic product(s) formed when the following compound is heated at reflux in an excess of concentrated HI.arrow_forwardWhat impurities were likely removed during the washing procedure during the preparation of cyclohexene by the dehydration of cyclohexanol and an acid catalyst phosphoric acidarrow_forward4 Why must the mixture of (Ethanol, Ethanoic acid and sulphuric acid) not be boiled during esterification process? 5- Write down the type of 2-methyl-2-propanol?arrow_forward
- What could be a potential use of adipic acid? A) Not much, adipic acid is a 1,6-dicarboxylic acid, so it easily decarboxylates. B) Adipic acid is extensively used in turophilic chemistry. C) Adipic acid is structurally related to sebacic acid. - We used sabacic acid to make 6,1d-Nylon. So if adipic acid were converted into its acid chloride, and then reacted with hexane-1,6-diamine, one could make 6,6-Nylon. D) Adipic acid is extremely toxic, so it is seldomly used in synthetic chemistry.arrow_forwardwhy acetic acid used as solvent in analysis of riboflavin instead of deionized water? explainarrow_forwarda) To a solution of 10 g (60 mmol) of 3-nitrophenylacetic acid in 120 ml of ethanol were added 20 ml of a saturated 5 solution of hydrogen chloride in ethyl acetate and the mixture was heated at reflux for 4 hours, cooled and left to stand at room temperature for 18 hours. The mixture was evaporated and the residue was partitioned between 120 ml of diethyl ether and 100 ml of saturated aqueous sodium 10 bicarbonate solution. The organic phase was dried over magnesium sulfate, filtered and evaporated to give 10.3 g. (82%) of ethyl 3-nitrophenylacetate as a pale yellow oil. [NMR spectrum (250 MHz) 81.25(t) (3H), 83.68(s) (2H), 84.6(q) (2H), 86.5-86.7(m) (3H), 87.09(dd) (1H)].arrow_forward
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