MOLECULAR POLARITYFIELD NOTE 157 / 175

Is SF2 polar or nonpolar?

Sulfur Difluoride (SF2) is polar because the two S–F bond dipoles do not cancel in its bent shape.

THE ANSWERPolar.

Sulfur Difluoride · bent at S

FIGURE 01

The molecule in space

Drag to turn the molecule. Show angles to read the model geometry.

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

THE REASONING

Why SF2 is polar

Sulfur has two bonding regions and two lone pairs in a simple VSEPR picture. The fluorine atoms are not opposite one another, so their S–F bond dipoles combine.

A USEFUL DISTINCTION

What to notice

Compare SF2 with linear XeF2: both contain fluorine, but only the bent arrangement leaves a net bond-dipole direction.

QUICK REFERENCE

Common questions about SF2

  1. 01
    What does the Lewis structure of SF2 show?

    The simple structure is F–S–F; sulfur has two lone pairs, and each fluorine has three.

  2. 02
    What is the molecular geometry of SF2?

    SF2 has a bent at S molecular geometry. The 3D model shows representative bond angles of 97.9°. These angles come from the displayed model coordinates.

  3. 03
    What is the molar mass of SF2?

    SF2 has an approximate molar mass of 70.06 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.

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