MOLECULAR POLARITYFIELD NOTE 92 / 175

Is Cl2O polar or nonpolar?

Cl2O is polar because the two O–Cl bonds meet at a bent oxygen center rather than opposing each other.

THE ANSWERPolar.

Dichlorine Monoxide · bent

FIGURE 01

The molecule in space

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STRUCTURE / 01
Cl ×2O ×1
ClClO
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01 / MODEL RECORDPubChem 3D coordinates. Atom sizes and bond thickness are illustrative.How model data is used ↗

THE REASONING

Why Cl2O is polar

Oxygen makes two O–Cl bonds and has two lone pairs, producing a bent molecular shape. The two chlorine atoms are identical, but the bond vectors do not point directly opposite each other, so their contributions do not cancel.

A USEFUL DISTINCTION

What to notice

Cl2O resembles H2O in having two bonds and two central lone pairs. Different terminal atoms change the bond polarity, but not the bent-shape reasoning.

QUICK REFERENCE

Common questions about Cl2O

  1. 01
    What does the Lewis structure of Cl2O show?

    The connectivity is Cl–O–Cl. Oxygen has two lone pairs, and each chlorine has three.

  2. 02
    What is the molecular geometry of Cl2O?

    Cl2O has a bent molecular geometry. The 3D model shows representative bond angles of 110.4°. These angles come from the displayed model coordinates.

  3. 03
    What is the molar mass of Cl2O?

    Cl2O has an approximate molar mass of 86.90 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.

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