Which of the following molecule(s) is / are chiral
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A chiral molecule is one that is not superimposable on its mirror image, lacking an internal plane of symmetry. It often has a carbon atom bonded to four different groups (a chiral center).
Analyzing the given structures:
The first molecule has a chiral center (carbon with four different groups: H, CH3, Cl, and a ring).
The second molecule is symmetric and achiral (has a plane of symmetry).
The third molecule is also symmetric and achiral.
The fourth molecule has no chiral centers and is planar/symmetric.
Therefore, only the first molecule is chiral.
Final Answer: The first molecule is chiral.