Phenol is brominated in solvent \(CS_2\) at low temperature. The products formed are

Monobromophenols

The correct answer is option 1. Monobromophenols.

Bromination of phenol in carbon disulfide (\(CS_2\)) at low temperature typically yields ortho and para-bromophenol. The reaction proceeds via electrophilic aromatic substitution, where bromine (\(Br_2\)) acts as the electrophile. At low temperatures, the reaction favors the substitution of bromine at the ortho and para positions due to steric hindrance.

The choice of \(CS_2\) as the solvent is due to its ability to dissolve both phenol and bromine and its inert nature under these reaction conditions. Additionally, using a non-polar solvent like \(CS_2\) can help control the regioselectivity of the reaction by minimizing the formation of unwanted by-products.