Molecular solids are a class of solids in which the primary bonding interactions are between individual molecules rather than atoms or ions. These solids are composed of discrete molecules that are held together by weak intermolecular forces, such as van der Waals forces, hydrogen bonding, or dipole-dipole interactions. Research in the field of molecular solids focuses on understanding the structure, properties, and behavior of these materials, as well as developing new molecular solids with specific desired properties. This research may involve studying the crystal structures of molecular solids, investigating their thermal, optical, and electronic properties, and exploring their potential applications in areas such as pharmaceuticals, materials science, and nanotechnology. Additionally, researchers may also examine the role of molecular fluids in the formation of molecular solids.