Clik here to view.
Answer by Oscar Lanzi for Why do compounds like SF6 and SF4 exist but SH6 and...
While other answers describe the reasons hypercoordination is more difficult with hydrogen than with fluorine, the former has been achieved — and it may have an impact on superconducting materials...
View ArticleClik here to view.
Answer by orthocresol for Why do compounds like SF6 and SF4 exist but SH6 and...
TL;DR Fluorine is electronegative and can support the extra negative charge that is dispersed on the six X atoms in $\ce{SX6}$, whereas hydrogen cannot.First, let's debunk a commonly taught myth, which...
View ArticleAnswer by Dale for Why do compounds like SF6 and SF4 exist but SH6 and SH4...
Notice also how the Group 1 metals form peroxides much like hydrogen. Why does potassium form peroxides but sodium does not?Alkalai Metals bond with Sulfur/Chalcogens in a 2:1 ratio and Hydrogen is...
View ArticleAnswer by himanshu for Why do compounds like SF6 and SF4 exist but SH6 and...
As sulfur belongs to group 16 in periodic table, its electronic configuration is ns²np⁴, it can show +2,+4 , +6 and -2 oxidation state. SF6 exists but SH6 doesn't because fluorine is the most...
View ArticleAnswer by Sayan for Why do compounds like SF6 and SF4 exist but SH6 and SH4...
$\ce{F}$ is much more electronegative compared to $\ce{H}$. Thus it causes a contraction in the $d$ orbital of $\ce{S}$. The $d$ orbital of $\ce{S}$ becomes much more energetically stabilised. It can...
View ArticleAnswer by Prokop Hapala for Why do compounds like SF6 and SF4 exist but SH6...
As michielm said, it is because of electronegativity. The bond $\ce{S-F}$ is strongly polarized toward the fluorine (~more electrons are near fluorine), while the $\ce{S-H}$ bond is polarized toward...
View ArticleAnswer by Eric Brown for Why do compounds like SF6 and SF4 exist but SH6 and...
The reason that they do not exist (or at least are not the most stable form) is because the decomposition reaction is exothermic.\begin{aligned}\ce{(1) && SF6 &-> SF4 + F2\\(2)...
View ArticleAnswer by Nicolau Saker Neto for Why do compounds like SF6 and SF4 exist but...
Hypervalency is a bit of a touchy subject since there are strong opposing proponents for both the hybridization camp and the 3-center-4-electron bond camp.While not directly related to your question's...
View ArticleAnswer by Michiel for Why do compounds like SF6 and SF4 exist but SH6 and SH4...
This is caused by the molecule $\ce{SF6}$ being hypervalent, which means that the main element (in this case sulfur) has more then 8 valence electrons. The reason why this can happen is extremely...
View ArticleWhy do compounds like SF6 and SF4 exist but SH6 and SH4 don't?
Both $\ce{SF6}$ and $\ce{SH6}$ and $\ce{SF4}$ and $\ce{SH4}$ have the same central atom and the same hybridization, but my teacher specifically mentioned that $\ce{SH6}$ and $\ce{SH4}$ don't exist....
View Article