What is the major product formed in the following reaction?




Answer is, there is Br in place of OH. Why is there no Hydride shift?

In organic chemistry, reactions can sometimes proceed in unexpected ways, depending on the conditions and the structure of the reactants. Without knowing the specific reaction you're referring to, it's challenging to give a precise answer. However, regarding your question about hydride shifts:

Reaction Conditions: The presence or absence of a hydride shift can depend on the reaction conditions. Some reactions may favor or disfavor certain rearrangements based on factors like temperature, solvent, and catalysts.

Stability of Intermediates: Hydride shifts typically occur to stabilize carbocations by forming more stable carbocations or to facilitate formation of more stable products. If the formation of the product doesn't require a hydride shift to stabilize intermediates, it may not occur.

Steric and Electronic Factors: The structure of reactants and transition states plays a crucial role. If the transition state leading to the product doesn't favor a hydride shift due to sterics or electronic factors, it might not occur.

If you could provide more details about the specific reaction or structure involved, I could give you a more tailored explanation.