Question

Can someone explain to me how to solve these. I dont understand how these answers are correct.

II. (16/100) Which structures represent likely products of the following reactions? Circle the letters corresponding to the structures of your choice. Each wrong answer will receive negative points. NC - ایک عام سا محلاه بعد - پوس-HC | ء Br , H2O H3CH2COH-3-2 methylene H CH H- CH, HgCCHCH CECHCH HgCHCCH CH3

Answer 1

If we look at the mechanism of those reaction : we can get the desined (right) product lay. el. . 20 Cambocation can nearrang so and to 3° and ao can attack from both upside and downside Racemic müxture + Reanpengement - cia J Now do can attack from only one . side So Sa o Product I So, answer is © © and ☺

@ Tom Bns y . . . R . and NacN = CNo nuchophile Here Sn2 neaction happens o so o CNo will attack from m . back sick and inver P ro -sion of configuration H i happens.so CR config becomes is But it is back so s inversion of config happens. 1 . So, the product is ® with . 'S' confige and 6 is 'R' config "so wrong and in and are to is in .. so very much unstable . axial ... ®. The answer is

2-3 methyl -2 pentine Jogn Br! BrzHeo is Br t .: : Bromonium in intermediate con form from both upsidki. and downsigle. and so, but can attack from down side and upside respectively - Sothe . answer is and IB Newman Projection Br O Atz .BY he Br -Chhah