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

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Henri Moissan uncovered the existence of SF6. Incidentally, that is also the discoverer the fluorine. The standard means of manufacturing SF6 is to reveal S8 to F2. This technique causes the formation of a couple of sulfur fluorides, however those have the right to be removed through heating and then using NaOH to remove any extr SF4 molecules.

SF6 can not be used instantly 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, us will discover the Lewis framework of SF6 and its link angles, molecular geometry and also shape the can help us recognize the physical properties of this molecule.


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

Contents


SF6 Valence Electrons

To recognize the Lewis framework of any molecule, we very first need to recognize the total variety of valence electrons. Here we will uncover out the total variety of valence electrons for SF6 by adding the valence electrons because that both Sulfur and Fluorine atoms.

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

Sulfur has six valence electrons.

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

= 6 + 7*6

= 6 + 42

= 48 valence electrons

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

SF6 Lewis Structure

The Lewis Dot structure of any molecule is a photographic representation of the atoms affiliated in forming the structure and its separation, personal, instance valence electrons. This framework helps us recognize the shortcut formations in the molecule and also the arrangement of electron in it.

Sulphur atom will take the main position together it is less electronegative than Fluorine. So ar it in the centre and also all Fluorine atoms approximately it choose this:

Fluorine atom requirements only one valence electron to finish its octet. As every atom follows the octet dominance to acquire a secure structure, the Fluorine atom will share one valence electron the the Sulphur atom. Thus, Sulphur will certainly share six of that is valence electrons v all the fluorine atom that result in forming six single bonds between S and F.

In Lewis Structure, we present the binding in the structure by illustration a straight line in between two atoms. So every these bonds will certainly take increase 12 valence electrons out of 48. 

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

Once you perform that, girlfriend will see valence electron in the external shells of every Fluorine atoms, yet Sulphur has more than 8 electrons in its outer shell. This is since it is an exemption to the octet role and can broaden its orbit to accommodate an ext electrons.

Hence, this is the best Lewis structure of SF6.

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SF6 Hybridization

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

The digital configuration the SF6 in its floor state is 3s23p4. But when it shares electrons and is in the excited state the electron pairs in both 3s and also 3p orbitals obtain unpaired. This electrons move to fill the greater vacant 3d orbitals. As a result, 6 hybrid orbitals are developed ( among 3s, 3 of 3p, and also two 3d). This hybrid orbitals room the ones the accommodate the mutual electrons. These orbitals overlap through the 2p orbitals the the fluorine atom as soon as Sulfur and also Fluorine atoms form bonds. These six orbitals space in the 6 directions of the octahedron shape. 

Hence, Sulfur Hexafluoride has sp3d2 hybridization.

SF6 bond angle

As Sulphur share its valence electrons through 6 Fluorine atoms, we can see that all 6 electrons of the Sulphur atom are common to type 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 roughly it. The atom are put in the octahedral pattern, which renders the molecule geometry the SF6 is octahedral. 

SF6 Shape

Looking at the molecular geometry of the molecule, we have the right to say that the SF6 molecule has an octahedral shape as it has eight sides. However, the central atom binding with six Fluorine atoms, the shape 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 when six fluorine atoms room arranged symmetrically around the sulfur atom, the link dipoles are cancelled. As a result, that 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 essential solvents.

Concluding Remarks

To summarize this article we have the right to say that in the Lewis dot framework of SF6, every the valence electrons are offered up which outcomes in forming six solitary bonds in between S-F through no lone bag of electrons.

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