Please complete parts A and B **cis-4-Bromocyclohexanol and trans-4-Bromocyclohexanol Reactivity with NaOH***Problem:*When treated with NaOH, cis-4-bromocyclohexanol and trans-4-bromocyclohexanol yield different substitution products.**Tasks:**a) **Propose a Mechanism for Each Reaction:**1. **Cis-4-Bromocyclohexanol**: - Reacts with NaOH to form a product where NaOH facilitates the substitution. - The hydroxyl group (OH–) remains, while the bromine (Br) is replaced, resulting in a compound with both hydroxyl groups on adjacent carbons.2. **Trans-4-Bromocyclohexanol**: - Reacts with NaOH under different conditions, potentially involving elimination leading to ring formation. - A cyclopentane derivative with an ether linkage is formed.b) **Provide an Explanation for Differences in Products:**- The variation in product formation can be attributed to the stereochemistry of the starting materials. - In the cis structure, both substituents (OH and Br) facilitate easy substitution due to spatial orientation.- In the trans structure, steric strain or torsional effects may promote elimination and ring closure rather than direct substitution.**Diagrams Explained:**1. **Cis-4-Bromocyclohexanol Reaction:** - Diagram shows conversion with NaOH leading to substitution with retention of the OH group.2. **Trans-4-Bromocyclohexanol Reaction:** - Diagram indicates complex transformation involving elimination and new ring formation, depicted with a cyclopentane-like structure containing an ether linkage.

Substrate- Secondary alkyl halide Nucleophile - strong SN2 reaction is favored.1) Reaction Mechanism- OH in substrate is above the plane. Reaction goes via SN2 concerted mechanism. Attack of nucleophile and loss of leaving group is simultaneous. Back side attack of nucleophile gives the desired product. 2) Reaction Mechanism- In trans-4-brormocyclohexanol, Intra-molecular SN2 reaction is favored. As leaving group (Br) and alkoxide ion are on opposite side, intramolecular reaction occurs giving bicylic ether. In cis-4-brormocyclohexanol, Formation of alkoxide ion does not favor intramolecular SN2 as OH and Br are on same plane. Hence, trans-4-brormocyclohexanol and cis-4-brormocyclohexanol react in different manner and ether cannot be formed form cis-4-brormocyclohexanol.