Question

2. Predict the major product(s) for the following reactions. (3 pts) HBr (a) 1) O3 (b) 2) DMS fox O*K* Br (c)

Answer 1

It is based on concept of reaction mechanism. Their are various reactions given and products are drawn as follows:

Ans :- (a) Bo HBY the ist step forming (product) Mere initially pootan is added in Carbocation which rearra range to Carbocation. Futher attack more stable Bro sto give product mechanismi- H-Br Ht t : Bo H H hudridę Shift : BY; (Carlocatten less stable (30 Carbocation more stable) : BO BO (product, 1 (6) 003 2 CH3-c=0 2) Dms Foto H Here, Dms stands for dimethyl sulphide (me, s). process of ozonolys is followed by reduction as reductive Ozondlysis. Mechanism is as follows: It is called

mechanismn ? - 03 . 1 Dms) (CH3), (CH339-3 + (side poodent) ů 111 2 (ozonide) 2. сносно Prodent) (C) Br -OK ca + → A bulky base tor is used . Therefore elimination HB6 occursp. E2 elimination occurs and Proton is eliminated from least hindered side Which gives product Mechanism :- tok tö (Bulky base) Br, öt > -HBY (product) ( This bulky base eliminates Proton from less hindered side) HK H 13 Br
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