Question

the image shows a lewis structure for the molecule anthracene, and a representation of the relative orientations of ten anthracene molecules in a crystal of anthracene. anthracene is a molecular conductor of electricity in its molecular crystal form (also represented in the image). crystalline anthracene has a high melting point, 215°c. what are the intermolecular forces primarily responsible for holding the molecules together in a crystal of anthracene?
hydrogen - bonding
london dispersion forces
dipole - dipole intermolecular forces

Explanation:

Anthracene is a non - polar molecule. Hydrogen - bonding occurs between molecules with hydrogen bonded to highly electronegative atoms like N, O, or F, which is not the case for anthracene. Dipole - dipole forces act between polar molecules, and anthracene is non - polar. London dispersion forces are present in all molecules and are the primary intermolecular forces holding non - polar molecules like anthracene together in a crystal.

Answer:

London dispersion forces