Concept explainers
(a)
Interpretation: The given
Concept introduction: Hydrogenation reaction is exothermic in nature due to the fact that the bonds are stronger in product than in reactant. Heat of hydrogenation can be used as measure for relative stability of alkenes when they are reduced to same
(b)
Interpretation: The given alkenes are to be ranked in order of increasing
Concept introduction: The addition of
(c)
Interpretation: The products formed when given alkenes are treated with
Concept introduction: In presence of ozone and
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Organic Chemistry
- a) What is the major alkene formed when A is dehydrated with H2SO4? (b) What is the major alkene formed when A is treated with POCl3 and pyridine? Explain why the major product is different in these reactions.arrow_forwardDraw the organic products formed when cyclopentene is treated withfollowing reagent. [1] CH3CO3H; [2] H2O, HO−arrow_forwardDraw all of the substitution and elimination products formed from thegiven alkyl halide with each reagent: (a) CH3OH; (b) KOH. Indicate thestereochemistry around the stereogenic centers present in the products,as well as the mechanism by which each product is formed.arrow_forward
- Consider cycloheptatrienone and ethylene, and draw a possible product formed from each type of cycloaddition: (a) [2 + 2]; (b) [4 + 2]; (c) [6 + 2].arrow_forwardDraw the products formed when (CH3)2C=CH2 is treated with following reagent. [1] BH3; [2] H2O2, HO−arrow_forward4. What are the products obtained from the following elimination reaction? Indicate the major product. CH;CH2CCH3 H2O CI 5. a) Determine the major product that is formed when the alkyl halide reacts with a hydroxide ion in an elimination reaction. CH;CH,CH,CH,CCH3 Br b) For the major elimination product obtained in 5a), which stereoisomer (cis or trans) is obtained in greater yield? Draw the two isomers and provide the names of the compounds.arrow_forward
- Draw the products formed when CH3CH,C=CCH,CH3 is treated with each reagent: (a) Brz (2 equiv); (b) C2 (1 equiv).arrow_forward(a) Rank the following carbocations in order of increasing electrophilicity (1 = lowest electrophilicity, 4 = highest electrophilicity). (b) Rank the following 1,1-halomethylcyclopentanes in order of reactivity in an SN1 reaction (1 = lowest reactivity, 4 = highest reactivity. CH3 CI B with SNI, nor reactive means more stable (c) Rank the following species in terms of increasing nucleophilicity in an SN2 reaction in a po aprotic solvent (1 = lowest nucleophilicity, 4 = highest nucleophilicity).arrow_forwardDraw all of the substitution and elimination products formed from the given alkyl halide with each reagent: (a) CH3OH; (b) KOH. Indicate the stereochemistry around the stereogenic centers present in the products, as well as the mechanism by which each product is formed.arrow_forward
- Dehydration of 1,2,2-trimethylcyclohexanol with H2SO4 affords 1-tert-butylcyclopentene as a minor product. (a) Draw a stepwise mechanism that shows how this alkene is formed. (b) Draw other alkenes formed in this dehydration. At least one must contain a five-membered ring.arrow_forwardDraw the structures of A, B, C and D in each step. NaH A- B H₂SO4 C 150 °C Darrow_forwardLess stable alkenes can be isomerized to more stable alkenes by treatment with strong acid. For example, 2,3- dimethylbut-1-ene is converted to 2,3-dimethylbut-2-ene when treated with H2SO4. Draw a stepwise mechanism for this isomerization process.arrow_forward
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