Sulfur hexafluoride or SF6 is one inorganic, greenhouse gas. That is non-flammable, odourless, and colourless, and is great insulator. That is a hypervalent octahedral molecule that has been an amazing topic that conversation among chemistry enthusiasts.

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Henri Moissan uncovered the existence of SF6. Incidentally, he is also the discoverer of fluorine. The standard means of manufacturing SF6 is to reveal S8 to F2. This method causes the formation of a few sulfur fluorides, yet those deserve to be removed through heating and then making use of NaOH to eliminate any extr SF4 molecules.

SF6 can not be used immediately after synthesis. It demands to be purified to get rid of all reactive fluorides. After that, it needs to go with pyrolysis. 

Here in this blog post, we will learn the Lewis structure of SF6 and also its bond angles, molecule geometry and shape the can aid us know the physics properties that this molecule.


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

Contents


SF6 Valence Electrons

To identify the Lewis structure of any type of molecule, we very first need to know the total number of valence electrons. Below we will discover out the total variety of valence electrons because that SF6 by adding the valence electrons for both Sulfur and also Fluorine atoms.

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

Sulfur has six valence electrons.

Fluorine has actually seven valence electrons, but as there are six Fluorine atom in this molecule, we will certainly multiply this number by 6.

= 6 + 7*6

= 6 + 42

= 48 valence electrons

Thus SF6 has 48 valence electrons that will assist us draw the Lewis Dot framework of SF6.

SF6 Lewis Structure

The Lewis Dot framework of any type of molecule is a photographic representation the the atoms associated in developing the structure and its individual valence electrons. This structure helps us know the bond formations in the molecule and the plan of electrons in it.

Sulphur atom will take the main position together it is much less electronegative than Fluorine. So place it in the centre and also all Fluorine atoms about it like this:

Fluorine atom demands only one valence electron to finish its octet. As every atom follows the octet rule to achieve a steady structure, the Fluorine atom will share one valence electron the the Sulphur atom. Thus, Sulphur will certainly share 6 of its valence electrons through all the fluorine atoms that result in forming six single bonds between S and F.

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

Place all the continuing to be valence electrons approximately the Fluorine atoms and check if the octets of all the fluorine atoms space complete. 

Once you perform that, friend will watch valence electron in the outer shells of all Fluorine atoms, yet Sulphur has an ext than 8 electron in its outer shell. This is because it is an exemption to the octet function and can increase its orbit to accommodate an ext electrons.

Hence, this is the best Lewis framework of SF6.

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SF6 Hybridization

Now the we know the Lewis framework of SF6, we have the right to now recognize the atoms’ hybridization in the molecule. Here as Sulphur is sharing its electrons through the Fluorine atoms, we will look in ~ its hybridization. 

The electronic configuration that SF6 in its floor state is 3s23p4. However when it shares electrons and also is in the excited state the electron bag in both 3s and 3p orbitals acquire unpaired. This electrons relocate to to fill the greater vacant 3d orbitals. As a result, six hybrid orbitals are developed ( one of 3s, 3 of 3p, and also two 3d). These hybrid orbitals are the ones the accommodate the shared electrons. This orbitals overlap v the 2p orbitals that the fluorine atom as soon as Sulfur and Fluorine atoms kind bonds. These six orbitals are in the six directions that 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 that the Sulphur atom are common to type bonds. The bond edge of F-S-F is 90 degrees.

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SF6 molecule 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 placed in the octahedral pattern, which makes the molecule geometry the SF6 is octahedral. 

SF6 Shape

Looking in ~ the molecule geometry of the molecule, we deserve to say that the SF6 molecule has an octahedral form as it has actually eight sides. However, the main atom bond 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 due to the fact that the VSEPR theory claims that when six fluorine atoms space arranged symmetrically about the sulfur atom, the link dipoles are cancelled. Together a result, the is a nonpolar molecule.


It likewise has the 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 write-up we can say the in the Lewis dot framework of SF6, all the valence electron are supplied up which outcomes in developing six solitary bonds between S-F with no lone pairs of electrons.

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The hybridization the Sulphur in this molecule is sp3d2 v the bond angles of 90 degrees.