Question

1) When 3-iodo-3-ethylpentane is treated with sodium methoxide in methanol, the major organic product is an ___ that is generated through an ____mechanism. A) ether, SN1 B) ether, Sn2 C) ether, E1 D) alkene, E2 E) alkene, E1

Answer 1

1. (E) Alkene Et Explanation : Secondary or tea hagy alkjo na as a major product ondang or tertany alkyl halde given arrene a major product when it is truealed with Sodium metnoxide only Primary alkyl nalide give ether Here the compound 3° so it gives alkene by the Es mechanism . 3 ally) nalize give fi elechon 2. (B) 3 chloro iz engle pentane phon - Cuc Cu - Ch; H, CH30 Na + OH - CH = CH , CH3 CH5 City 3. Hoffman Zoutsev According to this slull major Poloduct | According to this major product 18 alueajs last substituted akone is the most substituted allene il mejor product Armed ie from B major product formed from B Carbon wheen has the least number Carbon which has maximum numbers of hydrogen of hydrogen Bo 3. qіс қонена - - СН-СН3 eg: ca 1 - CH₂ - CH – CH3 CHA 9 Be CHE B & B CH3 lalekoh City--CH2 – CH = CHL с A Hoffman is favoured when compound contain poor leaving group, eg - CH3 -CH2 - CH2 - CH -CH2 alkoh , CH3CH,CH = CH2 + CH3 CH2 -214 = CH-CH3 Hoffman product major - Parmar and see alkyl halides gives Hofmann elimination when the size of the base is bulky eg: Sodium Salt of tel butoxide. CH2 -CH, -CH-CH2 CH3 -C-8K CH3-CH 2 -CH=CH, + CH3 - CH = CH-CH3 Hoffman product miner Product) Jeg CH3-CH-CH-CH3 à CH3