When styrene (vinylbenzene) is commercially polymerized, about 1–3% of 1,4-divinylbenzene is often added to thestyrene. The incorporation of some divinylbenzene gives a polymer with more strength and better resistance to organicsolvents. Explain how a very small amount of divinylbenzene has a marked effect on the properties of the polymer

When styrene (vinylbenzene) is commercially polymerized, about 1–3% of 1,4-divinylbenzene is often added to thestyrene. The incorporation of some divinylbenzene gives a polymer with more strength and better resistance to organicsolvents. Explain how a very small amount of divinylbenzene has a marked effect on the properties of the polymer

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter21: Benzene And The Concept Of Aromaticity

Section: Chapter Questions

Problem 21.48P: In the chemical synthesis of DNA and RNA, hydroxyl groups are normally converted to triphenylmethyl...

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What are the various synthesis of linear, branched, and/or cyclic ethers? Show reaction schemes, discuss reaction mechanisms step by step, and indicate any limitations or advantages of the approach.
When styrene (vinylbenzene) is commercially polymerized, about 1–3% of 1,4-divinylbenzene is often added to thestyrene. The incorporation of some divinylbenzene gives a polymer with more strength and better resistance to organicsolvents. Explain how a very small amount of divinylbenzene has a marked effect on the properties of the polymer.8
One common type of cation exchange resin is prepared by polymerization of a mixture containing styrene and 1,4-divinylbenzene . The polymer is then treated with concentrated sulfuric acid to sulfonate a majority of the aromatic rings in the polymer. Q.) Show the product of sulfonation of each benzene ring.
Industrial Chemistry, Benzene is a high-commodity aromatic material with many industrial applications but is produced in relatively small amounts through petroleum fractionation. Explain how Toluene can be converted to benzene, please be specific in terms of reagents and conditions.
In 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?
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.
An organic compound A (C2H3N) is used as a solvent of choice for many organic reactions because it is not reactive in mild acidic and basic conditions. Compound A on treatment with Ni/ H2 forms B. When B is treated with nitrous acid at 273K ethanol is obtained. When B is warmed with chloroform and NaOH a foul smelling compound C formed. Identify A, B and C.
Which of the following could be used as a solvent in the deprotonation reaction of terminal alkynes? A CH;OH (I) B CH;COOH (I) NH3 (1) D) H20 ()
An unknown compound A of molecular formula C10H18O reacts with H2SO4 to form two compounds (B and C)of molecular formula C10H16. B and C both react with H2 in the presence of Pd-C to form decalin. Ozonolysis of B forms D, and ozonolysis of C forms a diketone E of molecular formula C10H16O2. Identify the structures of compounds A, B, C, and E.
Quinolines, heterocyclic compounds that contain a pyridine ring fused to a benzene ring, are commonly synthesized by a method known as the Skraupsynthesis, in which aniline reacts with glycerol under acidic conditions. Nitrobenzene is added to the reaction mixture to serve as an oxidizing agent.The first step in the synthesis is the dehydration of glycerol to propenal. a. What product would be obtained if para-ethylaniline were used instead of aniline?b. What product would be obtained if 3-hexen-2-one were used instead of glycerol?c. What starting materials are needed for the synthesis of 2,7-diethyl-3-methylquinoline?
Like alcohols, ethers undergo a cleavage by breaking a carbon–carbon bond between an alkyl group and the carbon bonded to the ether oxygen atom; that is, the red C–C bond in R–CH2OR' is broken. With this in mind, propose structures for the fragments formed by a cleavage of (CH3)2CHCH2OCH2CH3. Suggest a reason why an ether fragments by acleavage.
One synthetic advantage of olefin metathesis is that the catalyst tolerates a variety of functional groups in the reactant. In a synthesis of the antiinfluenza drug Tamiflu (oseltamivir), ring-closing metathesis was used to prepare the highly functionalized cyclohexene derivative shown. What was the reactant?