Chemical Bonding and Interactions: Understanding Dipole-Dipole Interactions
What best represents this molecule engaging in dipole-dipole interactions?
a. Linear structure with symmetrical distribution of charges
b. Asymmetrical distribution of charges with a polar bond
c. Nonpolar molecule with a symmetrical arrangement of atoms
d. Molecule with a large number of lone pairs
Final answer:
A molecule with an asymmetrical distribution of charges with a polar bond best represents dipole-dipole interactions.
Explanation:
A molecule with an asymmetrical distribution of charges with a polar bond best represents dipole-dipole interactions. In dipole-dipole interactions, polar covalent bonds behave as if the bonded atoms have localized fractional charges that are equal but opposite. If the structure of a molecule allows the individual bond dipoles to not cancel each other out, the molecule will have a net dipole moment and exhibit dipole-dipole interactions. These interactions occur between the positive and negative ends of neighboring polar molecules.