Sulfur Difluoride is an inorganic molecule comprised of one Sulphur atom and also two Fluorine atoms. It has a chemistry formula of SF2 and also can be created by the reaction the Sulphur Dioxide and Potassium Fluoride or Mercury Fluoride. In this blog post, we will look in ~ the Lewis dot framework of SF2, its molecule geometry and also shape.

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Name of moleculeSulfur Difluoride ( SF2)
No of Valence electron in the molecule20
Hybridization of SF2sp3 hybridization
Bond Angles98 degrees
Molecular Geometry of SF2Bent

SF2 Valence electrons

For drawing the Lewis framework for any type of molecule, we first need to understand the total variety of valence electrons. So us will an initial find out the full valence electrons because that Sulphur Difluoride.

Total number of valence electrons because that SF2 – Valence electrons of Sulphur + Valence electron of Fluorine

Sulfur has six valence electron in its external shell.

Fluorine has seven valence electrons.

Total number of valence electrons for SF2 – 6 + 7*2 ( as there space two atoms of Fluorine, we will multiply the number through 2)

= 6 + 14

= 20 valence electrons

So, Sulphur Difluoride has actually a full of 20 valence electrons.

SF2 Lewis Structure

Lewis framework is the pictorial representation of the plan of valence electrons around the individual atom in the molecule. And now that we recognize the total valence electron of SF2, we will start making the Lewis Dot structure for this molecule.

Firstly, location the Sulphur atom in the centre as it is less electronegative than Fluorine. So it will certainly be in the central position v both this Fluorine atom on the terminal ends.

Fluorine atoms require one valence electron to finish its octet so it will share one valence electron that the Sulphur atom. Therefore both the Fluorine atoms form a single bond through the Sulphur atom by sharing one valence electron of the Sulphur atom. 

Each bond offers up two valence electrons so here 4 valence electrons are offered from 20 valence electrons. As octets of Fluorine atoms room complete, placed six valence electrons approximately each Fluorine atom. For this reason a full of 16 valence electrons space used.

And Sulfur atom has 4 valence electron that perform not take part in bond formation and hence that is called lone pair or nonbonding pair that electrons. So in the Lewis framework of SF2, there are solitary bonds in between Sulphur and Fluorine atoms with two lone pairs of electrons on the central Sulphur atom.


SF2 Hybridization

To uncover out the Hybridization of this molecule, us will consider the two numbers the atoms and the total number of lone electron pairs bonded to the molecule. Here, if us look in ~ the Sulphur atom, the is bonded v two atoms and has two electrons pairs. We get the last number 4, which synchronizes to sp3 Hybridization. In fact, both Fluorine atom are additionally sp3 hybridized. So, SF2 has sp3 Hybridization. 

SF2 molecule Geometry

The molecule geometry of the molecule depends on the Lewis structure and also the arrangement of valence electron in the structure. The sulfur atom has two bonding bag of electrons and also two nonbonding bag of electrons that stand for the VSEPR id of AX2E2, which coincides to one angular/non-linear or bent molecular geometry. So Sulfur Difluoride has actually a bent molecular geometry. 

SF2 Shape

In the Lewis structure of SF2, the main atom forms two bonds v two Fluorine atoms and also has two lone pairs of electrons. The 2 lone bag of electrons press the Fluorine atoms downwards because of the repulsive forces, and as a result, the form of this molecule is bent.


Hence, SF2 is a bent-shaped molecule as result of the presence of lone pairs on the Sulphur atom.

SF2 shortcut Angles

The molecules with direct geometry have bond angle of 180 degrees but here as the form of the molecule is bent because of the lone pairs on the Sulphur atom, both Fluorine atoms are driven downwards, deviating the bond angle of F-S-F native 180 come 98 degrees. 


Is SF2 polar or nonpolar?

To identify the polarity of any molecule, we examine for the complying with factors:

Presence that lone pairsThe shape of the moleculeThe difference in electronegativities the atomsNet Dipole minute in the molecule

Sulfur Difluoride has a bent molecule geometry having two single bonds and also two lone pairs of electrons. This lone pairs of electrons distort the form of the molecule, and hence that is non-linear. Together these lone pairs shot to keep their repulsive pressures minimal, they push down the Fluorine atoms.

Due come the existence of the lone pairs, over there is the contrary in the molecule. And also as a result, the charges will certainly not be same distributed, increasing the chances of the polarity in the molecule.


When us compare Sulphur and also Fluorine atoms’ electronegativities, the value of electronegativity that Sulphur is 2.58 and also for Fluorine is 3.98. So here the difference of the electronegativities the both this atoms is much greater than 0.5, which makes the S-F binding polar. And due come this vast difference in electronegativity, there will certainly be a dipole moment in between Sulphur and also Fluorine atoms. The direction that the dipole minute will it is in from the Sulphur atom towards the Fluorine atom, as here Fluorine will try to pull the mutual electrons to itself.

As this molecule is not linear, the dipole moment on both sides space not canceled out, leading to the non-zero network dipole moment of the molecule. Hence, SF2 has actually poles in the molecule, whereby there room partial an unfavorable charges ~ above the Fluorine atom and also partial confident charges ~ above the Sulfur atom which makes SF2 a polar molecule.

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Concluding Remarks

To summarise this blog, we have the right to say that,

SF2 has a simple Lewis framework in i beg your pardon the Sulphur atom is in the center forming solitary bonds v both the Fluorine atoms.There room two lone bag of electrons on the Sulphur atom which makes the geometry that the molecule bent.The Sulphur atom has actually sp3 Hybridization, and also the bond edge of F-S-F is 98 degrees.It is a polar molecule together there is a net dipole moment in the molecule.