Chlorine and bromine react in the dark with alkenes The reaction shown below affords a single major product as a racemic mixture For the mechanism step below, draw curved arrows to show electron reorganization. Consider the formation of just one of the product stereoisomers Arrow pushing Instructions Incorrect Previous Ne

Chlorine and bromine react in the dark with alkenes The reaction shown below affords a single major product as a racemic mixture For the mechanism step below, draw curved arrows to show electron reorganization. Consider the formation of just one of the product stereoisomers Arrow pushing Instructions Incorrect Previous Ne

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter9: Addition Via Cyclic Intermediate

Section: Chapter Questions

Problem 5CTQ

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Please help with the following ochem reaction scheme shown in the below image
a) Consider the reaction of HBr with ethylene and propylene. At roomtemperature the reaction of propylene with HBr is much faster than thereaction with ethylene.Using reaction energy diagrams and your knowledge of carbocationstability explain why this is so. b) Xylene (dimethylbenzene) is a commonly used chemical in the printingindustry and as a cleaning solvent for oily waste. It is also used whenpreparing histological samples to remove waxes from biological samples.Draw the three possible structures for this compound and give the UPACnames for each. Define which structures are ortho, meta, and para.
Chlorine and bromine react in the dark with alkenes. The reaction shown below affords a single major product as a racemic mixture. .CI Cl2 For the mechanism step below, draw curved arrows to show electron reorganization. Consider the formation of just one of the product stereoisomers. Arrow-pushing Instructions
Which of the following statements describes accurately the mechanism of the bromination of alkenes? Choose all that apply. O As a consequence of the cylic bromonium ion and anti-addition, a maximum two stereoisomers are formed even though the dihalide product may have two chiral carbons. O Instead of a carbocation intermediate, bromination forms a cyclic bromonium intermediate. O A symmetric cis alkene will form only stereoisomer that is a meso compound O The mechanism of the bromination of alkenes is absolutely the same as the general mechanism of electrophilic addition of alkenes. O The bromide ion can only add to the side opposite the C-Br bonds of the bromonium ion because of steric hindrance.
b) Which of the flowing reactions will have the faster rate and give a better yield? Use drawings of the transition state (show orbitals!) to explain why. Br NaOCH3 CH3OH Br NaOCH3 CH3OH
Consider the reaction. Draw the FULL electron pushing mechanism for the reaction including ALL intermediates (with lone pairs and formal charges), explicitly depicting any hydride shifts, and draw ALL electron pushing arrows.
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Draw the mechanism of the following reaction, using the curved-arrow notation to indicate the reorganization of electron density. Show all intermediates, lone pairs, nonzero formal charges, countercharges, and reversibility or irreversibility. Finally, explain in detail why the observed regio- and stereochemistry is as shown. :Br: CH3 low [:Br] (CH3 + H-OH, :Br: excess H,0 (racemic)
3) Show a complete mechanism and predict the product for the reaction shown below. Br₂ / H₂O Please provide perspective diagrams (wedge/dash notation), resonance forms, curved arrows, formal charges, and lone pairs as need for all species involved. With reference to the intermediate(s) involved, comment on both the regiochemistry and the stereochemistry of the process.
Choose which class of pericyclic reactions the following reaction belongs to, and use the number of electron pairs involved in the reaction and the product's stereochemistry to ascertain whether the reaction proceeds thermally or photochemically. H CH3 CH3 CH₂ CH3 CH₂ CH3 Check all that apply. cycloaddition sigmatropic rearrangement ene reaction electrocyclic reaction thermal conditions photochemical conditions
Bromination can occur in a 1,4 fashion across conjugated double bonds, as shown here for cyclohexa-1,3-diene. One mechanism that has been proposed involves a five-membered ring, bromonium ion intermediate, as shown below. (a) According to this mechanism, what should the stereochemistry be for the products-namely, all cis, all trans, or a mixture of both? (b) Observations from experiment show that both cis and trans products are formed. Does this support or discredit the proposed mechanism shown here? Br Br2 Cyclohexa-1,3-diene Br :Br: Br: Br:
please explain all steps, I am having trouble grasping this process :)