Question

QUESTION 25 Identify the major organic product expected from the acid-catalyzed dehydration of 2-methyl-2-pentanol. A. cis-3-methyl-2-pentene B. 2-methyl-2-pentene OC. 3-methyl-1-pentene D.2-methyl-1-pentene QUESTION 26 Which alcohol below would undergo acid-catalyzed dehydration most readily? 5-0 Ö 18 AA 0 QUESTION 27
im stuck on these 2 questions can i gt some gelp?

Answer 1

SS Page No.: Date: jalgaper83@gmail.com CH2 ch3 usou e ncha acuz-chaec cong Cha-cho-chac- (M2 CH₂ - CH - COG C- CH3 an au first step acid prokonales the og of the alcohol proto nation convert the very - poor leaving group on to a good leaving group (H2O). Lu the next step water departs and a carboceton is formed - the a hace in the reaction mixtase (water) removes a proton from a carbon adjacent to the positively charged carbon forming the alrene product & regenerating the acid catalyst. cuz CH₂CH₂ CH₂ Calz + H-osogh Z ch, CH₂ CH₂ C CH3 3 CH3 CH₂ CH = C-CH3 CH₂ CH₂ CH-C-ch3 2-methy. 2-pentene. -proton is removed from a ß carbon that contains fewest bonded hydrogein ng to Z aitsew's role more substituted alliere is more stable.

Fogo No.: Dolo among the tool the tollowing D will undergo acid catalysed dehydration more I readily OH CH3 U Ans? 0. rate determining step in dehydration of secondary or tertiary alcohols is the formation of carhocaron intermediate . Tertiary alcohols are the easier to dehydrate because testiary carbocations are more stable so selective esse of dehydration is 30 alcohol s 20 alcohol > 10 alcohol here in D CH3 C43 CH3 on H2SO4 3° carhocation 30 cornocation is readily. froming cuz sodelydrates chyou pocashoration B c₂ Hy sou 2° carbucetion Hason 20 Cashoration