Houser 15) If the substrate is 1°, which of the following reaction type(s) is/ar

Question

Houser 15) If the substrate is 1°, which of the following reaction type(s) is/are possible (circle the correct answer(s)): a) SN2 b) SN1 c) E2 d) E1 16) If the substrate is 3°, which of the following reaction typels) is/are possible (circle the correct answerls) a) SN2 b) SN1 c) E2 d) E1 17) For which of the following leaving groups is reaction possible (circle the correct answer(s) a) a good leaving group d)-OR g)Br b) a poor leaving group e)water c)-NR2 fjch i)-OH 18) Which of the following applies to a base (circle the correct answer(s) a)lt is a charge concentrated species b)lt is a charge polarized species c)lt prefers to attack acidic hydrogens d)lt prefers to attack electron deficient carbons 19) Which of the following is/are true statements (circle each true statement): a) The order of carbocation intermediate stability is 1° > 2, 3 b) The order of carbocation intermediate stability is 3° > 2°> 1° c) Alkyl groups exert electron donating inductive effects d) Alkyl groups exert electron withdrawing inductive effects e) Alpha hydrogens hyperconjugate with the carbocation carbon f) Beta hydrogens hyperconjugate with the carbocation carbon g) Delta hydrogens hyperconjugate with the carbocation 2

Explanation / Answer

answer 15: if substrate is primary ( 1 degree) it will prefer SN2 or E2 reaction type.Both SN2 /E2 is concerted process.

anser 16: if substrate is tertiary then definately SN1 or E1 occur.because S1 form tertiary carbacation which is highly stable 17: a good leaving group must present for reaction examples are F, Cl , Br, etc they are good leaving group

answer 18: option d is suitable for base. base is negatively charged ( electron rich) species so attacked electron deficient carbon.

answr 19: option b,c and e correct only.

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