MOLECULAR POLARITYFIELD NOTE 148 / 175

Is OF2 polar or nonpolar?

OF2 is polar because its two O–F bonds form a bent arrangement and their dipoles do not cancel.

THE ANSWERPolar.

Oxygen Difluoride · bent

FIGURE 01

The molecule in space

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

THE REASONING

Why OF2 is polar

Oxygen difluoride has a bent geometry with oxygen at center. Fluorine (3.98) is more electronegative than oxygen (3.44) and pulls electrons outward toward the fluorines, partially opposing the oxygen lone pair contribution.

A USEFUL DISTINCTION

What to notice

Fluorine pulls electron density away from oxygen in OF2. The bent shape stops the two O–F bond dipoles from canceling.

QUICK REFERENCE

Common questions about OF2

  1. 01
    What does the Lewis structure of OF2 show?

    O forms two single O–F bonds and keeps two lone pairs. Each F has three lone pairs.

  2. 02
    What is the molecular geometry of OF2?

    OF2 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 OF2?

    OF2 has an approximate molar mass of 54.00 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.

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