Question

answer these multiple choice questions plz

16. What is the product of the following reaction? 18. What is the product of the following reaction? KO 1. NaOCH, 2.H ? OCH он OCH Br OH BrЛон осна OH 19. Which of the following is a likely product of the reaction sequence shown? 17. Arrange the following alkyl halides in order of decreasing reactivity (most - least) in an Sw1 reaction: OH W 1. TsCl, pyridine 2. NaOH(aq) I 3-bromo-3-methylpentane II 1-chloropentane MI 2-chloropentane IV 2-iodopentane (a) I > III > IIV > II (b) IV>II>I> III () IV > I > II > III (d) I > IV > III > II (e) II > III >I> IV co

Answer 1

16. It is in basic cond. so attack will be on less hindered site.17.

16: 1. Na ÓCH3 o attack on hers Hindered site . Option () is correct. OCH₂

17 on the - In SN, Reactions , Rate depend Stability of Carbocation: Br. CH3 . HECTAC-CACH → CH CHIC-CICH CH₃ 3 Carbocation +1 / +H 2 ĄC- CH₂ - CH₂ - CH2=CH₂-6. ->CRESTEREO tet the_ t _ the HCACHE TEC <? all dect 1 H₃ C- H₂ M₂ č -e - + will - H₂C-the-bc-c-cn] o'l 1. .* zoet is more estable than alet which is more estable than qect I is better Leaning Group than cl, as both are got

so order will be 30 2071 le I > > I > I. (d) is correct option.
18. It is in acidic cond. so ring open from side which will give more stable carbocation.
+ - HBr - 38 King open From this side Because more estable et Will Attack From Back Side. om
19.
Tsel, Pyriline e OTS 2 NaOH * OH in and estep will heact from above the plane because of less hindrance. . So option (C) is correct OH