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10 questions with no upvoted or accepted answers
3 votes
0 answers
61 views

Is double excitation of nitrogen possible, and would it be able to use it as a central atom in a coordination complex?

I’m 17 and in my 2nd year of high-school (we have it a tad different here in the Czech Republic) and am interested in theoretical chemistry so that’s the explanation of the nature of my question. So, ...
Prokop Hoza's user avatar
3 votes
0 answers
475 views

Shielding vs electron-electron repulsion

Example of shielding: (source) The last electron in the 6s subshell of $\ce {Cs}$ is shielded from the nucleus by the inner electrons. Example of electron-electron repulsion: The electron affinity of ...
user avatar
3 votes
0 answers
101 views

Why is the bond angle of sulphur difluoride greater than that of hydrogen sulphide?

Why is the bond angle of $\ce{SF_2 (98.05^\circ) > SH_2 (92.11^\circ)}$? Isn't this contradicting Bent's rule or otherwise electron repulsion rule ? Fluorine is more electronegative and hence it ...
Ashish's user avatar
  • 1,409
2 votes
0 answers
767 views

AlCl3 and water

While reading Clayden's (et al) Organic Chemistry I stumbled upon a reaction on page 120 that I just fail to wrap my brain around. It describes a reaction of AlCl3 with water and states that, quote, &...
NaughtyPeroxide's user avatar
2 votes
0 answers
70 views

Ionic radius for tetrahedral metal–ligand complexes

The ionic radii for metal–ligand complexes that are in an octahedral coordination are easy to find. I understand that when the $\mathrm{e_g}$ orbital is filled, the ionic radius increases because the ...
bobsburger's user avatar
2 votes
0 answers
5k views

Unpaired electrons from magnetic moment

A complex formulated as $\ce{Cs_x[NbCl6]}$ has spin-only magnetic moment $\mu_{s.o}$ of approximately 2 B.M. From this value calculate how many unpaired electrons are present. Spin-only magnetic ...
Patrick Moloney's user avatar
2 votes
0 answers
52 views

Nomenclature of This State?

I've read this in a book It says the state having three parallel spin is called triplet state . But as far as I know it is determined by "2S+1", from this it comes out to be 4 . Then how it is "...
Aditya Shrivastava's user avatar
1 vote
0 answers
51 views

How does SOFC work?

The Solid Oxide Fuel Cell is a particular case in which an oxide is used as a conductor. Once i've heard that oxides usually aren't good conductors but it turned out that a lot of oxides are ...
Mirko's user avatar
  • 197
-1 votes
1 answer
80 views

Degeneracy of Orbitals

(Sorry, in advance if my question is silly or low quality but I want to ask this to someone.) When an electron enters an orbital, it should technically have an electric Field and also magnetic field(...
Krave37's user avatar
  • 107
-2 votes
1 answer
153 views

Colour of coordination compounds due to d-d transition

Hexaaquanickel(II) is green but tetracyanidonickelate(II) is colourless. On internet I found two explanations. One used valence bond theory that claimed there is no excitation of electron in ...
Harjot Dhillon's user avatar