Is CH2Cl2 Polar or Nonpolar?

Why is CH2Cl2 Polar?

Dichloromethane has two chlorine and two hydrogen substituents arranged tetrahedrally. The two C–Cl bond dipoles are much stronger than the two C–H dipoles, so they cannot cancel. The vector sum of all four bond dipoles gives a net moment of 1.60 D, making CH2Cl2 a common polar solvent.

• Electronegativity difference: Cl (3.16) is significantly more electronegative than C (2.55), creating partial charges on each atom and making the individual bonds polar.
• Tetrahedral shape (109.5°): The asymmetric molecular geometry means the bond dipoles point in directions that do not cancel — they add up to produce a net dipole moment of 1.60 D.
• Net dipole moment (1.60 D): Any molecule with a nonzero net dipole moment is classified as polar. The 1.60 D dipole moment of CH2Cl2 confirms its polar character.

Molecular Geometry of CH2Cl2

CH2Cl2 has a tetrahedral molecular geometry with a bond angle of 109.5°. Here is why this shape determines polarity:

• The central atom's electron pairs arrange themselves to minimize repulsion, resulting in the tetrahedral shape.
• The 109.5° bond angle creates an asymmetric arrangement — the bond dipoles point in directions that do not perfectly oppose each other.
• Asymmetry is the key: if CH2Cl2 had a perfectly symmetric geometry, its bond dipoles would cancel and the molecule would be nonpolar. The tetrahedral shape prevents this cancellation.

Electronegativity and Polarity

Electronegativity measures how strongly an atom attracts bonding electrons. A difference greater than ~0.5 on the Pauling scale generally means the bond is polar.

In CH2Cl2:

• C (central atom) electronegativity: 2.55
• Cl (outer atom) electronegativity: 3.16
• Difference: 0.61 — above the ~0.5 threshold, so the C–Cl bonds are polar

The combination of polar bonds and an asymmetric tetrahedral geometry means the partial charges do not cancel — making CH2Cl2 a polar molecule with a net dipole of 1.60 D.

Is CH2Cl2 Polar or Nonpolar? (Quick Answer)

CH2Cl2 (Dichloromethane) is polar. CH2Cl2 is a polar molecule because the two chlorine atoms create stronger dipoles than the two hydrogen atoms can balance, giving a net dipole of 1.60 D.