ej Alpha hydrogens hyperconjugate with thé carbocation carbon f) Beta hydrogens
ID: 573888 • Letter: E
Question
ej Alpha hydrogens hyperconjugate with thé carbocation carbon f) Beta hydrogens hyperconjugate with the carbocation carbon g) Delta hydrogens hyperconjugate with the carbocation Select the correct answers to questions 20 through 23 from among choices a through g, below (write the letter(s) corresponding to the correct answer(s) in the blank-following each question): 20) Which of the following statements pertains to E1 reaction 21) Which of the following statements pertains to SN1 reaction 22) Which of the following statements pertains to E2 reaction Which of the following statements pertains to SN2 reaction a)The attacking species attacks both faces of the carbocation with equal probability giving rise to an optically inactive product mixture b)The attacking species only removes hydrogens that are 180° from the leaving group c)The attacking species attaches 180° from the leaving group d)The attacking species attacks at the same time the leaving group is leaving e)The attacking species removes a hydrogen from a carbon adjacent to the carbocation carbon f)The path to the electron deficient carbon must be uncluttered in order for the attacking group to attack g)The transition state is pentavalent 0Explanation / Answer
20. For E1 reaction correct statement is e. In this case, the attacking groups remove the proton from the neighboring carbon.
21. a. Since carbocations are planar, the probability of attacking from both the sides are equal. Thus option a is the correct answer.
22. b, d. Since this process is anti, the attacking group removes hydrogens that are 180 degree from the leaving group. Also, this process is taking place by one step mechanism. Thus both the groups are leaving together.
23. c,d,f,g. this process is taking place by one step mechanism (happening together). Thus transition state is pentavalent. If the carbon is too much crowded, this process will not happen (since the transition state is pentavalent. Steric hindrance will be there)
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