The final product A, formed in the following reaction sequence is: Ph–CH=CH2 A (i) BH 3 2, (ii) H O OH OH (iii) HBr (iv) Mg, ether, then HCHO/H O + A (A) 2 Ph CH CH CH (B) 3 Ph CH CH | CH (C) 2 Ph CH

Question

The final product A, formed in the following reaction sequence is: Ph–CH=CH2 A (i) BH 3 2, (ii) H O OH OH (iii) HBr (iv) Mg, ether, then HCHO/H O + A

(A) 2 Ph CH CH CH
(B) 3 Ph CH CH | CH
(C) 2 Ph CH CH | CH OH
(D) 2 Ph CH CH CH OH

Prashant Kotian · Accepted Answer

Correct answer: D. PhCH = CH2 B H /H O ,OH 6 2 – PhCH2CH2OH PhCH CH OH + HBr 2 PhCH CH Br + H O 2 Mg/dry ether (S )2 PhCH CH CH OH 2 (I) H – C – H O (II) H O + PhCH CH 2MgBr (SN NGP)

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