Question

When phenyl magnesium Bromide reacts with tert. Butanol, which of the following is formed?
A. Tert. butyl Methyl Ether
B. Benzene
C. Tert. butyl benzene
D. Phenol

Answer 1

Hint: in the given question reaction between phenyl magnesium bromide and tert. Butanol is discussed. Phenyl magnesium bromide is an aryl magnesium halide which plays the role as a Grignard reagent in the reaction whereas tert. Butanol is a modest tertiary alcohol.

Complete Step by step answer: When Phenyl magnesium bromide reacts with t-butanol it produces benzene it is because phenyl group is an electronegative group which is associated with the active hydrogen of alcohol that is, -H of -OH group of alcohol. Grignard reagents react with compounds containing active hydrogen to form hydrocarbons corresponding to alkyl (or aryl) part of the Grignard reagent.
When Phenyl Magnesium Bromide reacts with tert. butanol, benzene is obtained as a product. The reaction arise is as follows

\[{\mathbf{Ph}} - {\mathbf{Mg}} - {\mathbf{Br}}{\text{ }} + {\text{ }}{\mathbf{tBu}} - {\mathbf{OH}} \to {{\mathbf{C}}_{\mathbf{6}}}{{\mathbf{H}}_{\mathbf{6}}}{\text{ }} + {\text{ }}{\mathbf{tBu}} - {\mathbf{OMgBr}}\]

Hence, the correct option is B.

Additional information: phenyl magnesium bromide is routinely represented as C6H5MgBr, the molecule is more complex, and is a magnesium-containing organometallic compound. Whereas tert-Butyl alcohol has been acknowledged in chickpeas and beer that is also found in cassava, which is mainly used for a fermentation ingredient in certain types of alcoholic beverages.

Note: tert-Butyl alcohol is derived commercially from isobutane as a coproduct of propylene oxide production. tert-Butyl alcohol is used as a paint remover ingredient, solvent, ethanol denaturant, and gasoline octane booster along with oxygenate. Phenyl magnesium bromide is also known as a strong nucleophile as well as a strong base.