Interpretation: The given question stated that when styrene is commercially polymerized, about
Concept introduction:
To determine: The explanation for the addition of small amount of divinylbenzene has a marked effect on the properties of the polymer.
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ORGANIC CHEMISTRY MASTERINGCHEM ACCESS
- The reaction of p-cresol with CH2=O resembles the reaction of phenol (PhOH) with CH2=O, except that the resulting polymer is thermoplastic but not thermosetting. Draw the structure of the polymer formed, and explain why the properties of these two polymers are so different.arrow_forwardWhat is the major organic product obtained from the reaction of toluene with fuming sulfuric acid?arrow_forwardIn the chemical synthesis of DNA and RNA, hydroxyl groups are normally converted to triphenylmethyl (trityl) ethers to protect the hydroxyl group from reaction with other reagents. Triphenylmethyl ethers are stable to aqueous base but are rapidly cleaved in aqueous acid. (a) Why are triphenylmethyl ethers so readily hydrolyzed by aqueous acid? (b) How might the structure of the triphenylmethyl group be modified to increase or decrease its acid sensitivity?arrow_forward
- Upon completion of a chemical reaction, you find you have a mixture of benzoic acid and ethyl benzoate. Propose a procedure to separate the ethyl benzoate from the mixture. You should look up the structures of benzoic acid and ethyl benzoate.arrow_forwardthe molar mass of the product obtained by the action of an acetylene hydrocarbon with excess hydrogen bromide, is 4 times greater than that of hydrocarbon. Find the molecular formula of acetylene hydrocarbonarrow_forwardAssuming that benzaldehyde is the limiting reagent for the synthesis of stilbene, that stilbene is the limiting reagent for the synthesis of stilbene dibromide, and that stilbene dibromide is the limiting reagent for the synthesis of diphenylacetylene; what is the overall % yield of diphenylacetylene from benzaldehyde given the percentage yield of each step of the reaction sequence as follows? Give only two significant digits. If the answer is a whole number with two digits, do not include the decimal. benza Idehy de Notes: 66% stil be ne 23% stilbene dibromi de 66% dipheny lacetyle nearrow_forward
- Assuming that benzaldehyde is the limiting reagent for the synthesis of stilbene, that stilbene is the limiting reagent for the synthesis of stilbene dibromide, and that stilbene dibromide is the limiting reagent for the synthesis of diphenylacetylene; what is the overall % yield of diphenylacetylene from benzaldehyde given the percentage yield of each step of the reaction sequence as follows? Give only two significant digits. If the answer is a whole number with two digits, do not include the decimal. 52% 87% benzaldehyde → stilbene → stilbene dibromide 41% Answer: diphenylacetylene Notes: For our multi-step synthesis we cannot just calculate the yield based on starting amount of benzaldehyde and final amount of diphenylacetylene because your group may have been supplemented with commercial material at one or more steps. In truth most chemist use an excess of the least expensive reagent to increase their yield. So in our case benzyltriphenylphosphonium chloride should probably be our…arrow_forwardPoly(vinyl alcohol) is a polymer used to make fibers and adhesives. It is synthesized by hydrolysis or alcoholysis of the polymer obtained from polymerization of vinyl acetate as shown below. a. Why is poly(vinyl alcohol) not prepared by polymerizing vinyl alcohol? b. Is poly(vinyl acetate) a polyester?arrow_forwardDifferentiate an internal alkyne from terminal alkyne in terms with its reactivity with test reagents.arrow_forward
- An organic compound A of unknown structure was found to have a molecular formula C8H16. When A was poured in water and heated, compound B having a molecular formula C8H18O was formed. B upon heating with sulfuric acid was converted to C as the major product which is identical to A. Ozonolysis of C gave one molecule each of two different products D and E, both having a molecular formula C4H8O. Write the reactions involved and determine the structure of A,B,C,D and E.arrow_forwardAlkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions -X티 Hö: H-O -CH3 -CH3 H30*arrow_forward10) For the reaction between isopropyl 1-propyl (or 'n-propyl') ether and HBr, which type of reaction best matches the expected products? A) Acid-catalyzed dehydration B) Nucleophilic substitution reaction C) Ether cleavage reaction D) Nucleophilic addition-elimination reactionarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning