Linked Questions

4
votes
2answers
2k views

Is ClH7 possible? [duplicate]

Chlorine can be $sp^3d^3$ hybridized. If so, it can form $\ce{ClH_7}$ and then chlorine, being more electronegative, will have (-7) as its oxidation number. But we know that the oxidation number of $\...
0
votes
0answers
51 views

How can PCl₆⁻ be formed [duplicate]

So my teacher told me that PCl6- exists, But how? What I don't understand is that Phosphorus has 5 valence electrons hence a covalency of 5 but this doesn't allow for 6 fluorine atoms to bond with ...
176
votes
8answers
158k views

Can an atom have more than 8 valence electrons? If not, why is 8 the limit?

According to some chemistry textbooks, the maximum number of valence electrons for an atom is 8, but the reason for this is not explained. So, can an atom have more than 8 valence electrons? If ...
66
votes
3answers
8k views

Why is it wrong to use the concept of hybridization for transition metal complexes?

I have asked a lot of questions on coordination chemistry here before and I have gone through a lot others here as well. Students, including me, attempt to answer those questions using the concept of ...
31
votes
1answer
4k views

What is the molecular structure of xenon hexafluoride?

Xenon hexafluoride, $\ce{XeF6}$, can be obtained by reaction of xenon with excess fluorine gas. What is the gas-phase structure of the molecule? What experimental evidence is there to support it, ...
29
votes
2answers
29k views

What is Drago's rule? Does it really exist?

My textbooks states the Drago's rule in inorganic chemistry as follows: The more electronegative atom prefers the orbital having more $\mathrm{p}$ character, and lone-pairs or less electronegative ...
13
votes
4answers
15k views

Hybridization of nitrogen in trisilylamine, (SiH3)3N?

I want to know the hybridization of the central atom in $\ce{(SiH3)3N}$. I think it should be $\mathrm{sp^3}$, because $\ce{N}$ is attached to three silicon atoms and one lone pair. But actually it ...
7
votes
2answers
3k views

How are the hybrid orbitals of sulfur hexafluoride shaped?

On the fluorine end the fluoride atoms are simply completing a $3p$ orbital. On the sulfur end one could posit a hybrid of one $3s$ orbital, two $3p$ orbitals and a three inner $2p$ orbitals. However,...
7
votes
1answer
7k views

Why can't NH5 form?

In ammonia a nitrogen atom forms 3 covalent bonds with hydrogen atoms and has one lone pair which can be used in a dative covalent bond with another hydrogen atom to form an ammonium ion. Instead of ...
14
votes
1answer
3k views

Why only two atoms share an electron and not three?

In a covalent bond between two atoms, an electron from one of the either atom is shared by overlapping of their orbitals. So, Why can't three atoms share an electron and overlap their orbitals?
9
votes
1answer
7k views

Why does potassium form peroxides but sodium does not?

As we go down the periodic table, Group 1 alkali metals hold their single outer valence electron more loosely, and so reactivity increases. Below potassium (Na, Li), we can store the metal in oil with ...
10
votes
1answer
730 views

How is the bonding in the [Au6C(PPh3)6]2+ cluster explained?

How can carbon form six bonds in such a compound as $\ce{[Au6C(PPh3)6]^2+}?$ I understand how carbon with five bonds can be formed $(\ce{CH5+},$ for instance), but it shouldn't have enough electrons ...
3
votes
1answer
2k views

What does reaction exothermicity say about the stability of molecules

If a reaction is exothermic it means that the energy state of the products is lower than that of the reactants so this will be the state that 'nature' will naturally strive for. Often you see that ...
3
votes
2answers
3k views

Why can sulfur have an expanded octet but not oxygen?

In my search to understand the bonding in structures like $\ce{SF6}$ I found many sources that said it was because sulfur has d orbitals to accommodate an expanded octet, which made sense to me. But I ...
10
votes
1answer
218 views

Does >2e contribution of an atomic orbital (AO) to a hybrid AO of a molecule violate Pauli exclusion?

This question is inspired by On the Role of d Orbital Hybridization in the Chemistry Curriculum J. Chem. Educ., 2007, 84 (5), p 783. The article calculates 6 bonding sulfur atomic orbitals in SF6 as ...

15 30 50 per page