Answered: 2. In the bromination reactions, what…

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2. In the bromination reactions, what is the function of CCl4? Why can it fulfil its role?

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter17: Nucleophilic Substitution Reactions Of Alkyl Halides

Section: Chapter Questions

Problem 3Q

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Question

2. In the bromination reactions, what is the function of CCl4? Why can it fulfil its role?
3. Bromination proceeds by either free radical substitution or electrophillic addition. Based on Table 3,
which mechanism is followed by alkanes? by alkenes? by alkynes?
4. For which hydrocarbon type is light necessary for bromination to take place?
5. What is the function of light in the bromination reaction? Why are alkenes and alkynes not included as
samples?

Definition Definition Simplest organic compounds that contain only single bonds between carbon – carbon atoms and carbon – hydrogen bonds. This means they are a series of saturated compounds with a general molecular formula, C n H 2n+2 .

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2. In the bromination reactions, what is the function of CCl4? Why can it fulfil its role?3. Bromination proceeds by either free radical substitution or electrophillic addition. Based on Table 3, which mechanism is followed by alkanes? by alkenes? by alkynes?4. For which hydrocarbon type is light necessary for bromination to take place?
The rate law for addition of Br2 to an alkenes is first order in Br2 and first order in the alkene. Does this information suggest that the mechanism of addition of Br2 to an alkene proceeds in the same matter as for addition of HBr? Explain.
The rate law for addition of Br2 to an alkene is first order in Br2 and first order in the alkene. Does this information suggest that the mechanism of addition of Br2 to an alkene proceeds in the same manner as for addition of HBr? Explain.
Free radical halogenation is used to replace one or more hydrogens on an alkane with one or more halogens (either chlorine or bromine). It is a substitution reaction. A student performs a free radical bromination on 3-methyl-pentane (5.88 g) to create the desired product of 3-bromo-3-methyl-pentane. The product mix, which hopefully contains almost all 3-bromo-3-methyl-pentane, is cleaned up by passing it through a gas chromoatograph, which separates out the 3-bromo-3-methyl-pentane from any undesired products made during the reaction (undesired products are created frequently in free radical halogenation). The initial product mix weighed 9.45 g; the purified 3-bromo-3-methyl-pentane weighed 7.21 g. What is the student's percent recovery?
In halogenation reactions, why are halogens added on opposite sides of the compound? because the reaction proceeds via free radical and the pi cloud holding the electron are directed away from each other because of the formation of a halonium ion which sterically blocks one side of the compound thus the other side is open for attack because the halogen should occupy both sides to accommodate the pi clouds None of the above Two equivalents of HCl are added to an alkyne, where do you expect to see the Cl atom? The two Cl atoms will be distributed between the two Carbon atoms involved in the triple bond The two Cl atoms forms a bond with the less substituted carbon Both Cl atoms attach to one carbon, which is the more substituted one A mixture of products are formed
What is the function of CH2Cl2 in the bromination reactions? Why can it fulfil this role
Define the Mechanism of the Radical Addition of HBr to an Alkene ?
How does the first step in the reaction of propene with Br2 differ from the first step in the reaction of propene with HBr?
Draw the structures of the two carbocation intermediates that might form during the reaction of propene (above) with HBr.
Phineas and Ferbs, two brothers who enjoy vacations, doing fun things every summer. This summer the brothers and their friends carry out an organic synthesis with an unknown compound (L1) that contains 52% Carbon, 6% Hydrogen and 42% bromine, this compound (L1) is treated with magnesium in ether to obtain L2 , which reacts violently with D2O for 1-methyl cyclohexene with a deuterium atom in the methyl group (L3). The L2 reaction is treated with acetone followed by hydrolysis to give L4. Heating L4 with concentrated sulfuric acid gives L5, which decolors the bromine, obtaining L6. L5 undergoes hydrogenation with excess hydrogen and platinum as a catalyst giving rise to isobutyl cyclohexane. Determine the structures of compounds L1 through L6.
Which of the statements about the hydration of alkenes and alkynes are true? * A- Both alkenes and alkynes are nucleophiles in addition reactions. B- Alkenes that are sensitive to rearrangement can be hydrated indirectly using Hg²⁺ as the hydration catalyst followed by reduction. C- The hydration of alkenes and alkynes both involves one nucleophilic addition step. D- All these statements are true. E- None of these statements are true.
What is the major product of the reaction when the alkane reacts with Cl2 instead of with Br2? Disregard stereoisomers.. What is the anticipated percent yield of the major product