When we compare Sulphur and Fluorine atoms’ electronegativities, the value of electronegativity of Sulphur is 2.58 and for Fluorine is 3.98. The two lone pairs of electrons push the Fluorine atoms downwards due to the repulsive forces, and as a result, the shape of this molecule is bent. In the Lewis Structure of SF 2, the central atom forms two bonds with two Fluorine atoms and has two lone pairs of electrons. So Sulfur Difluoride has a bent molecular geometry. The sulfur atom has two bonding pairs of electrons and two nonbonding pairs of electrons that represent the VSEPR notion of AX2E2, which corresponds to an angular/non-linear or bent molecular geometry. The molecular geometry of the molecule depends on the Lewis structure and the arrangement of valence electrons in the structure. In fact, both Fluorine atoms are also sp3 hybridized. We get the final number 4, which corresponds to sp3 Hybridization. Here, if we look at the Sulphur atom, it is bonded with two atoms and has two electrons pairs. To find out the Hybridization of this molecule, we will consider the two numbers of atoms and the total number of lone electron pairs bonded to the molecule. So in the Lewis Structure of SF2, there are single bonds between Sulphur and Fluorine atoms with two lone pairs of electrons on the central Sulphur atom. So a total of 16 valence electrons are used.Īnd Sulfur atom has four valence electrons that do not participate in bond formation and hence it is called lone pair or nonbonding pair of electrons. As octets of Fluorine atoms are complete, put six valence electrons around each Fluorine atom. So both the Fluorine atoms form a single bond with the Sulphur atom by sharing one valence electron of the Sulphur atom.Įach bond uses up two valence electrons so here four valence electrons are used from 20 valence electrons. So it will be in the central position with both these Fluorine atoms on the terminal ends.įluorine atoms need one valence electron to complete its octet so it will share one valence electron of the Sulphur atom.
And now that we know the total valence electrons of SF2, we will start making the Lewis Dot Structure for this molecule.įirstly, place the Sulphur atom in the centre as it is less electronegative than Fluorine.
Lewis Structure is the pictorial representation of the arrangement of valence electrons around the individual atoms in the molecule. So, Sulphur Difluoride has a total of 20 valence electrons. Total number of valence electrons for SF 2 – 6 + 7*2 ( as there are two atoms of Fluorine, we will multiply the number by 2) Sulfur has six valence electrons in its outer shell. Total number of valence electrons for SF 2 – Valence electrons of Sulphur + Valence electrons of Fluorine So we will first find out the total valence electrons for Sulphur Difluoride. Is SF2 polar or nonpolar? SF2 Valence electronsįor drawing the Lewis structure for any molecule, we first need to know the total number of valence electrons.
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