boat conformation

The "boat form" is a specific stereochemical conformation of a six-membered ring, such as a cyclohexane ring. In this conformation, two atoms directly opposite each other in the ring are positioned above the plane formed by the other four atoms in the ring. This is in contrast to the more stable "chair form".1

Cyclohexane, a common example, exists primarily in the chair conformation due to its greater stability. The boat and skew conformations are less stable. The boat conformation is destabilized by torsional strain and the close proximity of hydrogen atoms at opposite ends of the ring, known as flagpole hydrogens.2