Chapter 1: Stracture and Bonding rbocation in order of increasing stability, put

Question

Chapter 1: Stracture and Bonding rbocation in order of increasing stability, putting the least stable first. 41. Rank the 42. Which of the following statements about the stereochemistry of electrophilic addition of HX to alkenes is true? A Achiral starting materials yield an unequal mixture of two enantiomers. B) Hydrohalogenation occurs with syn stereochemistry only. co Hydrobalogenation occurs with anti stereochemistry only. D) Hydrohalogenation occurs with syn and anti addition ofHX. 43. Which of the following reactions of alkenes takes place with anti stereochemistry only? A) Addition of HBr B) Addition of Hizo in the presence of H2Sou CO Addition of BHs followed by HzoyHO D) Addition of Bri 44. Predict the product of the following reaction, ignoring stereochemistry. NBS DMSO, H20 Br Page 110

Explanation / Answer

41. Stability of carbocation follows the order: tertiary>secondary>primary; So, option B is correct

42. Adition of HX to alkene occurs via syn and anti addition. So, option D is correct.

43. addition of bromine to alkene occurs via only anti addition. So, option D is correct

44. Alkene reacts with NBS to form cyclic bromojium ion which is then attacked by water to form halohydrin. So, option B is correct.

36. This bromination is trans and gives meso product. So, option D is correct.

37. Option B is correct.

38. Hydroboration oxydation gives lesser substituted alcohol. So, option B is correct.

39. Option B is correct.

40. Option D is correct.

17. Option A is correct.

18. Option D is correct.

19. Greater substituted alkenes are more stable. So, option B is correct.

20. Hydroboration oxidation yields anti-Markonokov product. So, option D is correct.

21.option C is correct.

22. Option D is correct

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.