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Sulfur is in period 3 and has 6 valence electrons. The expected fluoride would be SF2, SF^ a very stable compound is surprisoing. The bonding in SF6 has been described in a number of ways- one is that there is sp3d2 hybridisation and there are 6 equivalent 2 electron 2 center bonds. Other descriptions involve resonance of ionic canonicals where the octet is preserved. Yet another description is "hypervalency" involving 3 centre bonds.

With BeH2 the situation is different, in this there are not enough electrons to form an octet. Some call this electron deficiency. In BeH2 each Be is surrounded by 4 hydrogen atoms, and there 4 BeHBe bonds- 3 center 2 electron. These are similar to bonds in B2H6.

The octet rule is a guideline- it has proved to be remarkably useful- but as someone said ".. in inorganic chemistry the rule is that there are no rules"

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Q: Why BeH2 and SF6 disobey octet rule?
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What compound is the octet rule expanded to include 12 electrons?

One example of a compound where the octet rule is expanded to include 12 electrons is sulfur hexafluoride (SF6). In SF6, the sulfur atom has 12 electrons around it, exceeding the typical octet rule. This expansion allows sulfur to complete its valence shell and achieve stability.


Does SF2 obey octet rule?

Yes, sulfur hexafluoride (SF6) obeys the octet rule. Sulfur forms 6 covalent bonds with fluorine atoms, allowing it to achieve a full outer shell of 8 electrons (octet).


Can atoms combine less or more than the octet rule?

Yes. In the case of BeCl2 and BF3, there are only 4 and 6 electrons on Be and B respectively and not eight. Similarly, in the case of SF6 and PCl5, there are 12 and 10 electrons on S and P respectively and not eight.


Does AsF6- obey the octet rule?

No, AsF6- does not obey the octet rule. Arsenic (As) can expand its valence shell to accommodate more than 8 electrons due to its empty d orbitals, which allows it to have more than 8 electrons around it in the AsF6- ion.


A sulfur atom has 6 electrons in its outer shell how many covalent bonds is it likely to form with other atoms?

i dont no your level of chemistry, but if you know about orbital you will understand. sulfur is able to disobey the octect rule to form up to 6 bonds tis is due to the presence of d orbital. eg. SF6


Can some atoms exceed the limits of the octet rule in bonding?

Yes, atoms from period 3 and beyond can exceed the octet rule by utilizing d-orbitals to accommodate extra electrons in bonding, known as expanded octet. Examples include sulfur in sulfur hexafluoride (SF6) which has 12 valence electrons around it, surpassing the octet rule.


What is the color of SF6?

Sulfur hexafluoride (SF6) is a colorless gas under normal conditions.


What is the chemical name for compound SF6?

The chemical name for compound SF6 is sulfur hexafluoride.


What is formula for Selenium Hexafluoride?

Sulfur hexachloride is an inorganic compound consisting of two different elements. The prefix hexa indicates that there are six chloride atoms. Thus, the formula is SCl6. Note that this compound does not obey the octet rule.


What formula for sulfur hexafluoride?

F6S is the formula for Sulfur Hexafluoride.


Is SF6 a Lewis acid or base?

Sf6 acts as an lewis acid............


Where sf6 gas is filling in sf6 braker?

Usually in a sealed tank, the switch contacts are in the tank too. The SF6 gas quenches any arcs that form when the switch contacts are opened.