(a)
Interpretation:
The alkene that gives same or different alcohol from either oxymercuration-reduction or hydroboration oxidation is to be stated.
Concept introduction:
Oxymercuration-reduction is one of the methods used to convert
Hydroboration reaction is a two-step reaction, which involves conversion of alkene into alcohol. This type of reaction follows anti-Markovnikov’s rule.
(b)
Interpretation:
The alkene that gives same or different alcohol from either oxymercuration-reduction or hydroboration oxidation is to be stated.
Concept introduction:
Oxymercuration-reduction is one of the methods used to convert alkenes into alcohols. This type of reaction follows Markovnikov’s rule.
Hydroboration reaction is a two-step reaction, which involves conversion of alkene into alcohol. This type of reaction follows anti-Markovnikov’s rule.
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Chapter 5 Solutions
Organic Chemistry
- Write the structure of the major organic product obtained by hydroboration–oxidation of each of the following alkenes: (a) 2-Methylpropene (d) Cyclopentene (b) cis-2-Butene (e) 3-Ethyl-2-pentenearrow_forwardtrans-3-hexene and cis-3-hexene differ in one of the following ways. Which one? (A) Products of hydrogenation (B) Products of ozonlysis (C) Products of bromine (Br2) addition (D) Products of hydroboration-oxidationarrow_forwardAlkenes can be hydrated to form alcohols by (1) hydroboration followed by oxidation with alkaline hydrogen peroxide and (2) acid-catalyzed hydration. Compare the product formed from each alkene by sequence (1) with those formed from (2). Q.)1-Methylcyclohexenearrow_forward
- (a) Cyclohexa-1,3-diene can be converted into a tetrasubstituted haloalkane when reacted with bromine in ether. Write a balanced chemical equation for the reaction that occurs and state the expected observation. (b) Compound A and B are alkenes with the same molecular formula C5H10. Compound A is a branched-chain alkene while compound B is a straight-chain alkene. The reaction between compound A with hydrogen bromide produces major product C which is optically active. (i) Draw TWO (2) possible structures for compound B. (ii) Outline the mechanism for the reaction between compound A with hydrogen bromide to form major product C. (iii) Name the product formed when compound A undergoes bromination reaction.arrow_forwardAcid-catalyzed dehydration of 2,2-dimethyl-1-hexanol gave a number of isomeric alkenes including 2-methyl-2-heptene as shown in the following equation.(a) Write a stepwise mechanism for the formation of 2-methyl-2-heptene, using curved arrows to show the flow of electrons. (b) What other alkenes do you think are formed in this reaction?arrow_forward1. Deduce the structure of each compound from the information given. All unknowns in this problem have molecular formula C8H12. (a) Upon catalytic hydrogenation, unknown W gives cyclooctane. Ozonolysis of W, followed by reduction with dimethylsulfide, gives octanedioic acid, HOOC—(CH2)6—COOH. Draw the structure of W. (b) Upon catalytic hydrogenation, unknown X gives cyclooctane. Ozonolysis of X, followed by reduction with dimethyl sulfide, gives two equivalents of butanedial, O=CH—CH2CH2—CH=O. Draw the structure of X.arrow_forward
- and (ii) KMnO4 in aqueous NaOH: 1. Name the following alkenes, and predict the products of their reaction with (i) KMnO4 in aqueous acid (a) (b) 2. Draw structures corresponding to the following IUPAC names: (a) 3-Ethylhept-1-yne (b) 3,5-Dimethylhex-4-en-1-yne (c) Hepta-1,5-diyne (d) 1-Methylcyclopenta-1,3-diene (1) 3. Draw and name all the possible pentyne isomers, C5H8. H H Ç-H [ Pent-1-yne] (2) 4. Predict the products of the following ring is inert to all the indicated reagents.) 4 H 4- (3) 4-C C = C-4 [3-methylbut -1-4 [Pent-2-yhdioselectivity where relevant. (The aromatic CH=CH2 Styrene (a) Styrene+H2 Pd, ? (c) Styrene+HBr ? (b) Styrene+Br2 → ? (d) Styrene+KMnO4 NaOH, H2O ? 5. Suggest structures for alkenes that give the following reaction products. There may be more than one answer for some cases. HyPd catalyst (a) ? Br₂ in CH2Cl2 (b) ? HBr (c) ? 2-Methylhexane 2,3-Dibromo-5-methylhexane 2-Bromo-3-methylheptane CH3 HO OH CH3CHCH2CHCHCH2CH3 KMnO4OH (d) ? H₂Oarrow_forwardGive the structure of the following compound(a) cis-1-fluoro-3-(fluoromethyl)cyclohexanearrow_forwardA compound with formula C8H12 reacts with 2 molar equiv of H₂ to yield a cycloalkane. By treatment of this compound with acidic KMnO4, a dicarboxylic acid, HOOCCH2CH2COOH is obtained. What is the structure of this compound? (A) (B) (C) (D)arrow_forward
- 5) Compound A reacted with Mg in ether to give B. Compound B is with Ethyl bromide to give Ethyl cyclohexane. What are the structures of A and B?arrow_forwardWrite the structure of the major organic product formed in the reaction of each of the following with hydrogen bromide in the absence of peroxides and in their presence. (a) 1-Pentene (b) 2-Methyl-2-butene (c) 1-Methylcyclohexenearrow_forward(1) Predict the outcome of the addition of HBr to (a) trans-2-pentene, (b) 2-methyl-2-butene, and (c) 4-methylcyclohexene. How many isomers can be formed in each case? (2) Addition of HBr to 3,3-dimethyl-1-butene gives a mixture of two isomeric alkyl bromide products. Draw structures for the two products, and give a mechanistic explanation for their formation.arrow_forward
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