Summary
Cycloalkanes, characterized by their cyclic structures (CnH2n), exhibit unique stereochemistry and conformational behavior compared to open-chain alkanes. Key concepts include the distinction between cis–trans isomers and conformers, along with an analysis of strain (angle, torsional, and steric) that affects molecular stability. Cyclohexane, adopting a chair conformation with distinct axial and equatorial positions, serves as a fundamental model for understanding the stability of substituted cycloalkanes and more complex polycyclic systems such as decalin and steroid frameworks.