Sulfur Difluoride is an not natural molecule consisted of of one Sulphur atom and also two Fluorine atoms. It has a chemical formula of SF2 and can be created by the reaction the Sulphur Dioxide and also Potassium Fluoride or Mercury Fluoride. In this blog post, we will look in ~ the Lewis dot structure of SF2, its molecule geometry and also shape.

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

SF2 Valence electrons

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

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

Sulfur has six valence electron in its external shell.

Fluorine has actually seven valence electrons.

Total number of valence electrons because that SF2 – 6 + 7*2 ( together there are two atoms of Fluorine, we will multiply the number through 2)

= 6 + 14

= 20 valence electrons

So, Sulphur Difluoride has a total of 20 valence electrons.

SF2 Lewis Structure

Lewis framework is the pictorial representation the the plan of valence electrons approximately the individual atom in the molecule. And also now the we understand the full valence electron of SF2, us will start making the Lewis Dot structure for this molecule.

Firstly, place the Sulphur atom in the centre together it is less electronegative than Fluorine. So it will certainly be in the central position v both these Fluorine atoms on the terminal ends.

Fluorine atoms require one valence electron to finish its octet therefore it will certainly share one valence electron the the Sulphur atom. So both the Fluorine atoms form a single bond with the Sulphur atom by share one valence electron that the Sulphur atom. 

Each bond supplies up 2 valence electron so here four valence electrons are offered from 20 valence electrons. As octets the Fluorine atoms space complete, placed six valence electrons approximately each Fluorine atom. For this reason a total of 16 valence electrons are used.

And Sulfur atom has 4 valence electron that execute not participate in bond formation and also hence the is dubbed lone pair or nonbonding pair that electrons. For this reason in the Lewis framework of SF2, over there are solitary bonds in between Sulphur and Fluorine atoms v two lone pairs of electrons on the central Sulphur atom.


SF2 Hybridization

To discover out the Hybridization that this molecule, we will consider the 2 numbers that atoms and also the total number of lone electron pairs bonded come the molecule. Here, if us look at the Sulphur atom, the is bonded v two atoms and has two electrons pairs. We gain the final number 4, which coincides to sp3 Hybridization. In fact, both Fluorine atoms are additionally sp3 hybridized. So, SF2 has sp3 Hybridization. 

SF2 molecule Geometry

The molecule geometry that the molecule depends on the Lewis structure and the arrangement of valence electron in the structure. The sulfur atom has two bonding pairs 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 molecule geometry. So Sulfur Difluoride has actually a bent molecular geometry. 

SF2 Shape

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


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

SF2 shortcut Angles

The molecules with straight geometry have actually bond angles of 180 degrees yet here together the form of the molecule is bent because of the lone pairs on the Sulphur atom, both Fluorine atom are driven downwards, deviating the bond edge of F-S-F indigenous 180 come 98 degrees. 


Is SF2 polar or nonpolar?

To recognize the polarity of any kind of molecule, we check for the complying with factors:

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

Sulfur Difluoride has a bent molecule geometry having two solitary bonds and two lone bag of electrons. This lone pairs of electrons distort the shape of the molecule, and hence it is non-linear. Together these lone pairs try to save their repulsive forces minimal, they push down the Fluorine atoms.

Due to the visibility 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, enhancing the opportunities of the polarity in the molecule.


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

As this molecule is no linear, the dipole moment on both sides room not canceled out, causing the non-zero network dipole minute of the molecule. Hence, SF2 has actually poles in the molecule, wherein there are partial an adverse charges top top the Fluorine atom and also partial optimistic charges ~ above the Sulfur atom which provides SF2 a polar molecule.

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Concluding Remarks

To summarise this blog, we deserve to say that,

SF2 has actually a straightforward Lewis structure in which the Sulphur atom is in the centre forming solitary bonds with both the Fluorine atoms.There room two lone pairs of electrons on the Sulphur atom which renders 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 network dipole moment in the molecule.