10. Addition Reactions
Alkyne Hydrohalogenation
10. Addition Reactions
Alkyne Hydrohalogenation - Video Tutorials & Practice Problems
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Get a 10 bullets summary of the topicAlkynes contain two π-bonds, so when they are exposed to electrophiles, they do exactly what you would expect them to do:they react TWICE with them.
Halogens Add Twice to Alkynes
1
concept
General properties of double addition reactions to alkynes.
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Keep in mind that for some of these reactions, vinyl carbocations will be created. While unstable, these cannot rearrage, so don’t worry about carbocation rearrangements when reacting with alkynes!
2
concept
Double hydrohalogenation of alkynes.
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General Reaction:
- Product: gem-dihalides
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PRACTICE PROBLEMS AND ACTIVITIES (15)
- Predict the major product(s) of the following reactions: a. phenylacetylene + 2HBr b. hex-1-yne + 2HCl
- Propose a mechanism for the entire reaction of pent-1-yne with 2 moles of HBr. Show why Markovnikov's rule sho...
- (••) For the alkynes shows here, show the product(s) expected to form when treated under the following conditi...
- (••) For the alkynes shows here, show the product(s) expected to form when treated under the following conditi...
- Predict the alkyne and reactants you might use to make the following haloalkenes. [Providing the reactant and ...
- HBr and peroxides are also used to generate 1-bromo-1-alkenes. Suggest a starting reactant that would successf...
- Predict the major products resulting from the addition of one equivalent of HX to the following alkynes.(b) &l...
- Predict the alkyne and reactants you might use to make the following haloalkenes. [Providing the reactant and ...
- (••••) The addition of H―X to alkynes has been shown to occur predominately via anti addition:<IMAGE>Two...
- What is the major product obtained from the reaction of each of the following compounds with excess HCl?c. CH3...
- Answer Problem 39 , parts a–h, using 2-butyne as the starting material instead of propyne.a. HBr (1 mol)b. HBr...
- Predict the major product(s) of the following reactions:c. cyclooctyne + 2HBrd. *hex-2-yne + 2HCl
- Show how hex-1-yne might be converted tof. 2,2-dibromohexane.
- Using hex-1-ene as your starting material, show how you would synthesize the following compounds. (Once you ha...
- Predict the products of reaction of pent-1-yne with the following reagents. (a) 1 equivalent of HCl (b) 2 equ...