Acetone and chloroform form an unusually strong intermolecular bond why is this

Both form a strong intermolecular bond because they cause a union derived from the electrostatic forces of the molecules and are held together in a crystal lattice. Acetone and chloroform are part of attractive and repulsive forces that are produced in molecules by their polarity. They belong to the hydrogen bonding group and cause intermolecular binding that means molecular union through existing forces.