4. Which of the alkyl chlorides listed below undergoes dehydrohalogenation in the presence of a strong...
1.Which organic bromide(s) would undergo E2 dehydrohalogenation to give isobutylene as a pure alkene? 2. Which organic bromide(s) would undergo E2 dehydrohalogenation to give pent-2-ene as a pure alkene?
Dehydrohalogenation - 30 and 2° alkyl halides are converted to alkenes by treatment of strong base. Dehydrohalogenation occurs through a concerted reaction mechanism. КОН ethanol Major Product Mechanism Zaitsev's rule - Dehydration - 30 and 2° alcohols are converted to alkenes by treatment with an acid catalyst. Acid catalyzed dehydration. H2SO4, H,0 THF, 50°C Major Product Mechanism Cyelopropane via Carbene generation-treatment of chloroform (CHCI) with base leads (KOH) to the formation of a Dichlorocarbene: HSC C: CI-C-H + KOH HC...
How many alkene products can be formed when the alkyl iodide
shown below undergoes E1 elimination?
9. How many alkene products can be formed when the alkyl iodide shown below undergoes El elimination? CH3 CH CH A) 1 B) 2 C) 3 D) 4 E) 5
Which halide can give only one product upon dehydrohalogenation? a) 3-bromopentane ! b) 2-chloro-4,4-dimethylpentane c) 3-chloro-2,2-dimethylhexane. d) 2-chloro-3,3-dimethylpentane
1.88 pts Question 2 u The structure of the anthelmintic (worm medicine) C-santonin is shown below. What is the unsaturation number of a-santonin? CH PICH b) 5 c) 6 d) 7 o b) ) d) o e) Question 6 1.88 pts Alkenes a) have lower boiling points than alcohols of similar molar mass. b) are more dense than alcohols of similar molar mass. c) react via the sigma bond of the carbon-carbon double bond. d) both (a) and (b) e)...
2. (10 points) Explain why the following deuterated 1-bromo-2-methylcyclohexane undergoes dehydrohalogenation by the E2 mechanism to give only the indicated product. н н wCH3 Осн, CH3 wCHs wCH Br H H D H not observed observed
Which of the following correctly reflects relative stabilities of carbocations? 3 degree allylic > 2 degree > 1 degree benzylic methyl > 2 degree benzylic > 3 degree 3 degree benzylic > vinyl >1 degree 2 degree allylic > 2 degree > vinyl 1 degree benzylic > 3 degree > 3 degree allylic Dehydrohalogenation of 2-bromobutane in the presence of a strong base proceeds via which of the following mechanistic pathways? S_N1 S_N2 E1 E2 none of the above Which...
Please help me understand why this is the correct answer
5. which of the following alkyl halides is most likely to undergo rearrangement in an SNI reaction? A) 2-chloro-3,3-dimethylpentane B) 1-bromo-4-methylcyclohexane C) 3-bromopentane D) 3-chloropentane CH3 c-C-C-L-C
1. Which alkene is the least stable? A 2,4-dimethylpent-2-ene B 2,4-dimethylrent-1-ene C 2.3 dimethylent-2-ene D. 3,4-dimethylpent-2-ene E. 3,4-dimethylpent-1-ene A. Solventio B. Hydrogen C. Heat Cap D. Both A a E Both Ba 8. Why is 2. Which is the major product from reaction of sodium iodine with (R)-2-bromo-3-methylbutane in dicholormethane (methylene chloride? A. 2-iodo-2-methylbutane B. 2-methylbut-2-ene C. (S)-2-iodo-3-methyl butante D. 2-methylbut-l-ene E. No Reaction A Atom B. Reso C. Hyb D. Pols E. Indi 3. Which is the major product...
2. Write the structures of all the alkenes formed from the E2 elimination of HX (dehydrohalogenation) of the compounds below using KOH and heat. Circle the major product. a. 1-chloropentane b. 1-bromo-4-methylpentane c. 1-bromo-2-methylpentane d. 1-bromohexane e. 2-bromo-2-methylpentane f. 2-chloromethylcyclopentane