Halides of Sulphur

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Sulphur hexaflouride (SF6) and Sulfur tetrafluoride (SF4)


Sulphur forms a number of halides in which the oxidation state of sulphur are +1, +2, +4 and +6. The well known halides are

S2X2 (X=F,Cl,Br or I) = oxidation state of S is +1

SX2 (X=F or Cl) = oxidation state of S is +2


Sulphur hexaflouride (SF6)


The oxidation state of Sulphur (s) in Sulphur hexaflouride (SF6) is +6.
Sulphur hexaflouride (SF6) is prepared by direct combination of Sulphur (S) and Flourine (F).

1/8 S8  +  3F2  ----------->  SF6

Sulphur hexaflouride (SF6) has octahedral shape. Sulphur atom is Sp3d2 hybridised.



Sulfur tetrafluoride (SF4)

Sulfur tetrafluoride (SF4) is prepared by fluorination of SCl2 with NaF

3SCl2  +  4 NaF  ------------>  S2Cl2  +  SF4  +  4 NaCl

Sulphur atom is  Sp3d hybridized in SF4 and possess triagonal bipyramidal geometry with one corner is occupied by a lone pair of electrons.



Sulfur dichloride (SCl2)


Sulfur dichloride (SCl2) is formed by saturating S2l2 with chlorine at ordinary temperature.

S2Cl2  +  Cl2  ------------->  2SCl2

In Sulfur dichloride (SCl2), sulphur atom is Sp3 hybridised and has angular structure.


Sulphur monochloride (S2Cl2)


Sulphur monochloride (S2Cl2) is also prepared by direct combination of liquid sulphur and chlorine.

1/4 S8  +  Cl2  ---------->  S2Cl2

The electron diffraction studies have shown a non planer structure for S2Cl2 which is similar to that of H2O2.

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