All Questions
Tagged with molecular-orbital-theory electrons
18 questions
3
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82
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Why are Mo(NR2)3 complexes isolobal with the nitrogen atom in N2
In a Molybdenum complex of the form Mo(NR2)3, the Mo is in the oxidation state of +3, leaving it with 3 d electrons. When combined with an additional 2*3 electrons from the ligands, this leaves it ...
-4
votes
1
answer
30
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Why is there a point of orbits along with quantization in case of energy gaps?
As per my textbook and online sources. The definition of Energy bands I have found is this:
A) Energy levels:
( In a simplified view of an electronic structure of a single atom or isolated molecule.
...
- 412
2
votes
0
answers
38
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How do the spin-matrices change in systems without spherical symmetry?
The (non-relativistic) spin matrices of a free electron, with $z$ as the quantization axis, read:
$$
\boldsymbol{S}_{x}=\frac{\hbar}{2}\left[\begin{array}{ll}
0 & 1 \\
1 & 0
\end{array}\right],...
- 181
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1
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Why does STED microscopy cause photodamage?
STED (stimulated emission depletion) microscopy is a technique which enables sub-diffraction limit of light imaging.
The depletion laser is at 775nm, and about 500 mW, concentrated for a short ...
- 337
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2
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Confusion regarding orbital, electron and Quantum no’s [closed]
Now , In some textbook I have read that orbital is nothing but the shape of electron . s,p,d orbitals etc.
So , after knowing shape of an orbital . I got to know that inside the orbital is an electron ...
- 190
-4
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1
answer
176
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Do higher orbitals have more energy or less energy? [duplicate]
I've recently learned that as an orbital gets larger, its energy gets closer to 0. Before this, I learned that when an electron moves down an orbital it releases the energy difference between those ...
- 101
1
vote
0
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67
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Why does ψ^2 ( square of orbital wave function ψ) give the probability of an electron in a given region? [duplicate]
Today I was introduced to the Orbital Wave Function for electrons.
$\Psi$ is a mathematical function for coordinate of electrons and has no physical meaning.
But $\Psi^2$ gives probability of an ...
2
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1
answer
3k
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Electron pairing in atoms
A question asks:
This question refers to isolated gaseous atoms. In which atom are all electrons paired? Ba, Br, S or Si?
I thought it was Ba as its electron configuration is [Xe] 6s2.
However, ...
- 205
1
vote
0
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Properties that probe electron kinetic energy
This post is inspired by a question regarding the meaning of off-diagonal elements of the KE matrix (in some AO basis). One answer suggests that a diagonalized KE matrix might not be very useful. I ...
- 22.9k
4
votes
2
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MO diagram of BeH₂
I was learning about the MO diagrams of triatomic molecules and was left slightly confused about $\ce{BeH2}$.
A picture of the MO is shown below:
When looking at the $\mathrm{1s}$ combinations, I ...
- 339
7
votes
3
answers
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De-excitation of a molecule
In our chemistry lecture today on UV/vis-spectroscopy, we discussed the origin of colour in conjugated molecules due to electronic transitions from lower-energy molecular orbitals to higher-energy ...
- 10.8k
5
votes
1
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Does Bent's Rule only apply to molecules where there is hybridisation?
I would just like to ask if the pre-requisite for using Bent's Rule is that the bonding in the molecule involves hybridised orbitals.
I was thinking of why the bond angle in hydrogen sulfide (~ 92 ...
- 10.8k
2
votes
1
answer
113
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Isn't the dual behaviour of subatomic particles contradictory?
I recently came across Molecular Orbital Theory. In this, if two electrons are bonding, their waves merge and they form a proper bond. But this is directly opposite to the particle theory, according ...
- 41
8
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1
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The electron configuration and electron density distribution in singlet oxygen
The molecular orbital schemes for singlet ($\mathrm{^1\Delta_g}$) and triplet oxygen ($\mathrm{^3\Sigma_g^-}$) are typically given as shown in the image below.
Figure 1: Molecular orbital schemes of ...
- 68.7k
2
votes
2
answers
2k
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Would nodal planes of participating Atomic orbitals be nodal planes of molecular orbital?
As I take sigma 2p antibonding molecular orbital as an example
Would it have 3 or 1 nodal planes. The two supposed nodal planes pass through the centres of the two atoms and are same as in the ...
- 1,185
3
votes
3
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Precise definition of atomic orbital
In school I was taught that an atomic orbital is the 3-dimensional region in which the electron is located with a probability of 90%.
However, aren't there infinitely many regions of space in which ...
7
votes
1
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5k
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Why is oxygen paramagnetic?
Paramagnetic molecules are molecules that have single electrons. When I draw the lewis structure of $\ce{O2}$, it appears to be a diamagnetic structure. What makes it paramagnetic?
- 453
8
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3
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Does the shared electron in Covalent bonds revolve around nucleus?
We know that electrons are charges that revolve around the nucleus. Then, when in covalent bonds the electron is shared; does the electron obey the rule?
