Step 1: Understanding the Problem.
The question asks for the correct organic structure for a compound undergoing an S\(_N\)2 reaction, which is a bimolecular nucleophilic substitution. In such reactions, the nucleophile attacks the electrophilic carbon while the leaving group departs.
Step 2: Analyzing the Options.
- (A) 1-Bromo-2-chloro-3-butene is the correct structure that fits the S\(_N\)2 reaction conditions as it provides the right positioning of substituents for substitution at the electrophilic carbon.
- (B), (C), and (D) are incorrect because they involve improper positions for the leaving groups, which would make the S\(_N\)2 mechanism less favorable.
Step 3: Conclusion.
The correct answer is (A) 1-Bromo-2-chloro-3-butene as it follows the proper structural formation for an S\(_N\)2 reaction.