True or False 1. With alkynes having 2 pi bonds, they have more electron-rich region than alkenes and, thus, are more reactive than alkenes. 2. Hydrobromination of an alkene follows anti-Markovnikov’s rule in the presence of a peroxide. 3. The reaction of BH3 with 2-methylbut-2-ene results in the attachment of a hydroxyl group, OH, on the third carbon since this carbon is less substituted. 4. The reduction of an alkyne using a strong base such as LiNH2 gives an alkane when 2 equivalents of hydrogen gas is added.

True or False 1. With alkynes having 2 pi bonds, they have more electron-rich region than alkenes and, thus, are more reactive than alkenes. 2. Hydrobromination of an alkene follows anti-Markovnikov’s rule in the presence of a peroxide. 3. The reaction of BH3 with 2-methylbut-2-ene results in the attachment of a hydroxyl group, OH, on the third carbon since this carbon is less substituted. 4. The reduction of an alkyne using a strong base such as LiNH2 gives an alkane when 2 equivalents of hydrogen gas is added.

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter19: Eas: Electrophilic Aromatic Substitution

Section: Chapter Questions

Problem 7E: When toluene is treated with sulfuric and nitric acids under special conditions, three nitro (NO2)...

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TRUE OR FALSE I. The reaction of BH3 with 2-methylbut-2-ene results in the attachment of a hydroxyl group, OH, on the third carbon since this carbon is less substituted. II. The reduction of an alkyne using a strong base such as LiNH2 gives an alkane when 2 equivalents of hydrogen gas is added. III. Hydrobromination of an alkene follows anti-Markovnikov’s rule in the presence of a peroxide.
When toluene is treated with sulfuric and nitric acids under special conditions, three nitro (NO2) groups are substituted for hydrogens at the 2, 4 and 6 positions on the ring (the next section discusses why the 2, 4, and 6 positions are substituted). The product is a highly explosive substance called 2,4,6-trinitrotoluene. This subastance is commonly known by a three letter name. What is it?
Are terminal alkynes considered weak or strong acids?
Are terminal alkynes considered weak or strong acids? Explain why...
Please solve correctly: Optio for Q1. a.)2-hexyne b.)3-methyl-1-pentyne c.)3-hexyne d.)1-hexyne e.)4-methy-1-pentyne Q2) a.)Alkenes react with nucleophiles and bases. b.)Alkenes react with electrophiles. c.)In the reactions of alkenes, the p bond is not always broken. d.)Alkenes contain double bonds from two sp-hybridized carbon atoms.
1. i.What are the various ways by which alkenes may be synthesized? ii. Give two examples each of Unsymmetrical alkenes and reagents. iii. Give two examples of reactions of alkenes that result in Anti-Markonikov’s addition products
Illustrate the Electrophilic Addition of HX to an Alkene ?
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10. Use Hammond's postulate to determine which alkene in each pair would be expected to form a carbocation faster in an electrophilic addition reaction. Choose which is the more reactive compound (in the box) for both pairs.
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Explain why the addition of HBr to alkenes A and C is regioselective, forming addition products B and D, respectively.
Explain why the addition of HBr to alkenes A and C is regioselective,forming addition products B and D, respectively.