Reaction of ROH with R'MgX produces:
RH
R'H
R-R
R-R'
Alkyl magnesium halides(RMgX) are called Grignard reagents. These undergo double decomposition reactions with water, ammonia, alcohol or amine having active H atom(attached to strongly electronegative O, N, S or F and triple bond, etc.) to give alkane corresponding to alkyl group of Grignard reagent. The reaction occurs as follows:
So,
R'MgX+ROHR'H+Mg(OR)X
Therefore, option (2) is correct.
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