CH3Cl, also known as chloromethane, is a polar molecule. This polarity arises from the difference in electronegativity between the carbon (C), hydrogen (H), and chlorine (Cl) atoms within the molecule.
The chlorine atom is more electronegative than the carbon atom, which means it pulls the electrons in the C-Cl bond closer to itself. This creates a partial negative charge (δ-) at the chlorine end and a partial positive charge (δ+) at the carbon end of the molecule, giving CH3Cl its dipole moment.
In terms of direction, the polarity of CH3Cl is directed towards the chlorine atom. Therefore, we can say that the dipole moment points from the hydrogen atoms and carbon (less electronegative) toward the chlorine atom (more electronegative).