All Questions
10
questions
0
votes
0
answers
41
views
Do the paired electrons of subshells' degenerate orbitals contribute to the total exchange energy?
For instance, in d7, there are 5 electrons with the same spin, and 2 electron with the opposite spin, meaning that there are only 3 unpaired electrons. So, which of these would be correct?
(i) Total ...
11
votes
2
answers
9k
views
Exchange energy of d6 configuration
In NCERT Chemistry book, it is given as:
Exchange energy is responsible for the stabilization of energy state. Exchange energy is approximately proportional to the total number of possible pairs of ...
user112344
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 ...
- 748
24
votes
0
answers
1k
views
What is d-orbital collapse?
When I was perusing the works of Schwarz on atomic structure, I came across the unfamiliar term of d-orbital collapse.
He describes it as a variation in energetic sequence from group 1 to 3 elements ...
- 241
4
votes
1
answer
2k
views
What's the configuration of chromium(III) in aqueous medium according to crystal field theory?
It has $\mathrm{3d^3}$ configuration, but how will we decide if they enter $\mathrm{t_{2g}}$ or $\mathrm{e_g}$ orbitals since we don't know which complex will form?
- 39
11
votes
1
answer
9k
views
What type of bonding is there among d-block metals?
Metallic bond strength in $\mathrm{d}$-block elements increases up to the middle and then decreases. Why does pairing decrease the strength of metallic bond? What does pairing have to do with metallic ...
- 401
2
votes
1
answer
303
views
General notation for one of the d-orbitals
What is the general notation to represent the d-orbital with $l=2$, $m_l=0$, i.e. the orbital normally referred to as $\mathrm{d}_{z^2}$. To elaborate more, this orbital can be ordered in various ways ...
- 427
7
votes
1
answer
3k
views
How many electrons are in the d orbitals of NiCl2·6H2O?
On Wikipedia, it says that
$\ce{NiCl2·6H2O}$ consists of separated trans-$\ce{[NiCl2(H2O)4]}$ molecules
linked more weakly to adjacent water molecules. Only four of the six
water molecules in ...
- 79
9
votes
2
answers
5k
views
Why do copper (II) complexes contain so many valence electrons?
Consider tetraaminecopper (II) ion. $\ce{[Cu(NH3)4]^2+}$ or $\ce{[Cu(NH3)4(H2O)2]^2+}$.
The copper(II) ion has the electron configuration $\mathrm{[Ar]\ 3d^9}$. How do the 4 electron pairs from the ...
- 191
3
votes
1
answer
8k
views
Spectrochemical Series - Sigma Donor Capability
I fully understand and recognise the manner and which the series works.
I cannot find any references for the change in sigma donor capability moving up the series.
For example, comparing $\ce{Cl-}$ ...
- 729