Sulfur hexafluoride or SF6 is an inorganic, greenhouse gas. That is non-flammable, odourless, and colourless, and is fantastic insulator. The is a hypervalent octahedral molecule that has actually been an interesting topic that conversation amongst chemistry enthusiasts.

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Henri Moissan found the presence of SF6. Incidentally, that is likewise the discoverer of fluorine. The standard means of manufacturing SF6 is to expose S8 come F2. This an approach causes the development of a couple of sulfur fluorides, but those deserve to be removed through heating and also then making use of NaOH to remove any added SF4 molecules.

SF6 can not be used immediately after synthesis. It demands to it is in purified to eliminate all reactive fluorides. After ~ that, it needs to go through pyrolysis. 

Here in this blog post, we will learn the Lewis framework of SF6 and its shortcut angles, molecular geometry and also shape the can help us know the physical properties that this molecule.


Name of moleculeSulphur Hexafluoride ( SF6)
No of Valence electrons in the molecule48
Hybridization of SF6sp3d2 hybridization
Bond Angles90 degrees
Molecular Geometry that SF6Octahedral 

Contents


SF6 Valence Electrons

To identify the Lewis structure of any molecule, we first need to recognize the total number of valence electrons. Here we will uncover out the total variety of valence electrons because that SF6 by including the valence electrons for both Sulfur and also Fluorine atoms.

Total variety of valence electrons in SF6 – Valence electron of Sulfur + Valence electron of Fluorine

Sulfur has six valence electrons.

Fluorine has seven valence electrons, but as there are 6 Fluorine atoms in this molecule, we will multiply this number through 6.

= 6 + 7*6

= 6 + 42

= 48 valence electrons

Thus SF6 has actually 48 valence electrons that will help us draw the Lewis Dot structure of SF6.

SF6 Lewis Structure

The Lewis Dot framework of any kind of molecule is a pictorial representation of the atoms associated in creating the structure and also its separation, personal, instance valence electrons. This structure helps us understand the link formations in the molecule and also the plan of electron in it.

Sulphur atom will certainly take the central position as it is much less electronegative 보다 Fluorine. So ar it in the centre and also all Fluorine atoms about it choose this:

Fluorine atom requirements only one valence electron to finish its octet. Together every atom complies with the octet rule to obtain a steady structure, the Fluorine atom will share one valence electron that the Sulphur atom. Thus, Sulphur will certainly share six of that is valence electrons v all the fluorine atom that result in forming six solitary bonds in between S and also F.

In Lewis Structure, we present the bond in the framework by drawing a straight line between two atoms. So all these bonds will certainly take up 12 valence electrons out of 48. 

Place all the staying valence electrons about the Fluorine atoms and also check if the octets of every the fluorine atoms space complete. 

Once you do that, friend will watch valence electron in the outer shells of all Fluorine atoms, but Sulphur has much more than 8 electron in its outer shell. This is because it is an exception to the octet role and can increase its orbit to accommodate much more electrons.

Hence, this is the best Lewis framework of SF6.

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SF6 Hybridization

Now that we know the Lewis structure of SF6, we have the right to now recognize the atoms’ hybridization in the molecule. Right here as Sulphur is sharing its electrons with the Fluorine atoms, we will certainly look at its hybridization. 

The digital configuration that SF6 in its soil state is 3s23p4. However when it share electrons and is in the excited state the electron pairs in both 3s and also 3p orbitals acquire unpaired. These electrons relocate to fill the higher vacant 3d orbitals. As a result, six hybrid orbitals are created ( among 3s, 3 of 3p, and also two 3d). These hybrid orbitals space the ones the accommodate the common electrons. These orbitals overlap through the 2p orbitals of the fluorine atom when Sulfur and also Fluorine atoms kind bonds. These 6 orbitals room in the six directions of the octahedron shape. 

Hence, Sulfur Hexafluoride has actually sp3d2 hybridization.

SF6 shortcut angle

As Sulphur shares its valence electrons through 6 Fluorine atoms, we can see that all six electrons the the Sulphur atom are mutual to form bonds. The bond angle of F-S-F is 90 degrees.

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SF6 molecular Geometry

When us look at Sulphur Hexafluoride molecule, Sulphur is in the main position through the fluorine atoms arranged symmetrically around it. The atoms are put in the octahedral pattern, which provides the molecular geometry that SF6 is octahedral. 

SF6 Shape

Looking in ~ the molecular geometry the the molecule, we deserve to say that the SF6 molecule has an octahedral form as it has actually eight sides. However, the main atom binding with 6 Fluorine atoms, the form of SF6 is octahedral.

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Is SF6 polar or nonpolar?

SF6 is a nonpolar molecule. This is because the VSEPR theory states that as soon as six fluorine atoms are arranged symmetrically around the sulfur atom, the link dipoles room cancelled. Together a result, it is a nonpolar molecule.


It also has the exact same properties together non-polar molecule such as being non-soluble in water and also being dissolve in non-polar organic solvents.

Concluding Remarks

To summarize this short article we have the right to say that in the Lewis dot framework of SF6, all the valence electron are provided up which outcomes in developing six single bonds between S-F with no lone pairs of electrons.

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The hybridization of Sulphur in this molecule is sp3d2 through the bond angle of 90 degrees.