Question

• Please show the Reaction Mechanism for the formation of 1-Ethyl 1-methyl 1-phenyl methanol (Ethyl methyl phenyl carbinol) from Ethyl Bromide. Also, discuss the following cases with plausible explanations with the possible reaction schemes. a) Formation of any by-product(s) with excess EtBr b) Formation of any Isomers c) Relative yields of the Major products if EtCl is used instead of EtBr under same reaction condition Just give brief reason(s) for your answers showing structure(s).

Answer 1

Настон, = H2CBr MgBr CH3 OH ... the moment cente come more of H30* Mg, Ether A CHE Hся в M HCMgBr CH3 сна CH3 Grignard reaction If we take more ethyl bromide then also reaction will not proceed further, since there is no any other carbonyl group in the molecule. The compound formed is racemic mixture that there are two enantiomers present. If we take ethyl chloride then also reaction gives good yield of compound.