Question

Synthesis of Triphenylmethanol

Why must the reaction be anhydrous?

              The water will protonate the Grignard reagent

The water will perform an electrophilic addition with the product of the reaction

The water will deprotonate the Grignard reagent

The water will perform a nucelophilic substitution with the product of the reaction

When performing a Grignard reaction it is also very important that the reaction be free from acetone (a chemical we commonly use to clean the glassware). Why must the glassware be free from acetone?

Acetone is a nucleophile that will react with the Grignard reagent

Acetone reacts with the bromobenzene

Acetone is an electrophile that will react with the Grignard reagent

Acetone reacts with the diethyl ether causing a side reaction to occur

During the work-up step, aqueous hydrochloric acid is added to the reaction and a gas is observed. What is the composition of the gas?

Carbon dioxide

water

ether

hydrogen

nitrogen

Is there a catalyst in this reactionn?Possible choices are bromobenzene,magnesium,benzophenone,diethyl ether or none.

Answer 1

1) Synthesis of Triphenylmethanol

answer : The water will protonate the Grignard reagent

2) When performing a Grignard reaction it is also very important that the reaction be free from acetone (a chemical we commonly use to clean the glassware). Why must the glassware be free from acetone?

answer : Acetone is an electrophile that will react with the Grignard reagent

3) During the work-up step, aqueous hydrochloric acid is added to the reaction and a gas is observed. What is the composition of the gas?

answer : hydrogen

4) Is there a catalyst in this reactionn?

answer : ,diethyl ether