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- For each reaction in question 20, sketch a reaction coordinate energy diagram indicating the starting materials, transition states and any intermediates, if present, in the reaction. Don't worry about the absolute energy of starting materials and products but you can assume that the product is more stable than the starting materials.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,CCH, Br b) For the major elimination product obtained in 5a), which stereoisonmer (cis or trans) is obtained in greater yield? Draw the two isomers and provide the names of the compounds.Determine the major product that is formed when the alkyl halide reacts with a hydroxide ion in an elimination reaction. 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.
- 4) Draw all of the possible alkene products from the following reaction. Indicate in what proportions these alkenes would be produced relative to one another. HO H₂SO4 Reflux9. Draw the structural formulas for the product(s) of each of the reactions below. ("n" indicates "many".) | b) n cIC(CH2)6CCI + n HO(CH2)2OH → |The reaction of 3-methylene-1-cyclohexene and HBr yields the four products shown in the attachment. Which two are formed at high temperatures and which two are formed at low temperatures? Why? Why is 1-bromo-3-methylenecyclohexane not formed?
- Desribe the reaction product.2. The following carbocation is generated as an intermediate in the addition of H-Br to an alkene. Draw the structure of all possible alkenes that could have formed this intermediate.What about the second step in the electrophilic addition of HCl to an alkene-the reaction of chloride ion with the carbocation intermediate? Is this step exergonic or endergonic? Does the transition state for this second step resemble the reactant (carbocation) or the product (alkyl chloride)? Make a rough diagram of what the transition state may look like?
- 1. What changes in color occur when bromine reacts with an alkene?3. Please draw the most important (stable) resonance form of the carbonation that mediates the following reaction: OH H3O+ O 4. Draw the structure of the alkene isomer (with the molecular formula of C5H10) that is most reactive one in the addition reaction with Br₂.The addition reaction of an acid (HBr) to an alkene (CH3CH=CH2) follows Markovnikov's rule and involves: A) initial attack by Br– B) initial attack by Br• C) isomerization of CH3CH2CH2Br D) formation of a primary carbocation. E) formation of a secondary carbonation. (F) Formation of allyl carbocation