Question

Given,

Answer 1

The answer here is dependent on the fact that deals with the synthesis of Grignard reagent using organo bromide compounds and then further reaction of this Grignard reaction with benzaldehyde and subsequent hydrolysis yields secondary alcohol. This fact gives you the required answer.

Complete answer:
We have studied about the various facts that deal with the synthesis of regents in the chemistry classes. We are also familiar with the Grignard reagent and its uses.
Now, let us see how it is synthesized which also involves the above given reactant and reagent mentioned.
- The reactant given in the above question is an organo bromide and this on reaction with magnesium metal in tetrahydrofuran as solvent gives us the Grignard reagent that is organic magnesium halide which is in particular here that is organo magnesium bromide.
- Grignard reagents are used in the organic reactions for the creation of new carbon – carbon bonds.
In the above question when this organo bromide is treated with Mg in THF we get the Grignard reagent as shown below,

This on further reaction with benzaldehyde and on subsequent hydrolysis reaction, the product forms will be secondary alcohol which is as shown in detail below,

Thus, the product formed will be,

Note:
Tetrahydrofuran and diethyl ether are both used for the preparation of Grignard reagent and this is because the Grignard reagent is readily formed in these solvents and is soluble and does not react with it but THF being more polar in nature stabilizes the metal cations better than diethyl ether.