Which of the following statements about chiral molecules is correct?

A chiral molecule is defined as a molecule that cannot be superimposed on its mirror image, which occurs when a molecule lacks certain symmetry elements.

The statement indicating that a chiral molecule cannot have an improper rotation axis is accurate because an improper rotation axis includes a rotation followed by a reflection through a plane perpendicular to the axis of rotation. If a molecule possesses an improper rotation axis, it often indicates that the molecule has symmetry elements that can lead to superimposition with its mirror image, thus making it achiral.

Chirality often arises from the presence of a chiral center (typically a carbon atom bonded to four different substituents) and the absence of symmetry elements, such as a mirror plane or an inversion center. Other options pertain to the nature of chirality: a chiral molecule does not possess a mirror plane (making it asymmetrical), it cannot have an improper rotation axis (as discussed), and it does not necessarily require a center of inversion, which is another symmetry element that is often present in achiral molecules. While some chiral molecules can have specific types of symmetry unrelated to improper rotation or inversion, these do not negate their chirality.

Thus, the notion that a chiral molecule cannot have