12. of the fellowing alohols will dchydrase mest rapidly with sulfunic acid and heat? oln Which of the following reactions has a mechanism that involves the formation of a cyelic intermediate from acyclic starting materials? A dehydration of an alcohol B. addition of HBr to an alkene C. chlorination of an alkanc D. addition of bromine to an alkene 14 Which of the following radicals is the most stable? 15. Describe the indicated C-H bond indicated below in terms of orbital overlap CH3-CH-CH2 (A) sp3-sp (B) sp3-sp (C) sp2-1s (D) sp-1s 16 The following process demonstrates: 0 ?? (B) conjugation (C) racemization (D) tautomerism (A) resonance 17. Which of the following compounds is a conjugated diene? A. 1,3-pentadiene C. 1,4-cyclohexadiene B. 1,4-pentadiene D. 1,5-hexadiene
Solution
12. Option A, since it forms more stable tertiary carbocation
13. Option D since it forms three membered cyclic bromonium ion
14. Option A, since order of radical stability:3°>2°>1°
15. Option C, since double bonded carbon is sp2 hybridization and hydrogen is 1s
16. Option D, Tautomerism, keto - enol Tautomerism
17. Option A, Conjugate dienes are those which have alternate double bonds
.
12- of the fellowing alohols will dchydrase mest rapidly with sulfunic.docx
1. 12. of the fellowing alohols will dchydrase mest rapidly with sulfunic acid and heat? oln Which
of the following reactions has a mechanism that involves the formation of a cyelic intermediate
from acyclic starting materials? A dehydration of an alcohol B. addition of HBr to an alkene C.
chlorination of an alkanc D. addition of bromine to an alkene 14 Which of the following radicals
is the most stable? 15. Describe the indicated C-H bond indicated below in terms of orbital
overlap CH3-CH-CH2 (A) sp3-sp (B) sp3-sp (C) sp2-1s (D) sp-1s 16 The following process
demonstrates: 0 ?? (B) conjugation (C) racemization (D) tautomerism (A) resonance 17. Which
of the following compounds is a conjugated diene? A. 1,3-pentadiene C. 1,4-cyclohexadiene B.
1,4-pentadiene D. 1,5-hexadiene
Solution
12. Option A, since it forms more stable tertiary carbocation
13. Option D since it forms three membered cyclic bromonium ion
14. Option A, since order of radical stability:3°>2°>1°
15. Option C, since double bonded carbon is sp2 hybridization and hydrogen is 1s
16. Option D, Tautomerism, keto - enol Tautomerism
17. Option A, Conjugate dienes are those which have alternate double bonds
