All Questions
6
questions
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What is the link between the classical and quantum definition of the symmetry number?
From what I understand, the symmetry number for a molecule can be defined in 2 ways:
1. The quantum mechanical symmetry number corrects for overcounting the number of possible rotational states of a ...
- 647
2
votes
2
answers
504
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Why does dipole must lie parallel to a rotation symmetry axis?
While studying group theory, I've got confused by the following statement:
For a molecule to have a permanent dipole moment, it must have an asymmetric charge distribution. The point group of the ...
- 21
5
votes
2
answers
1k
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Link between centrosymmetry, dipole moment and chirality
What is the relationship between the three concepts in the title?
I know all centrosymmetric molecules are achiral, but not all achiral molecules are centrosymmetric. Thus, there are no molecules ...
- 40.9k
6
votes
2
answers
363
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Potential wells and symmetry in absorption spectroscopy
In a course I am following, we are analyzing the potential wells in molecular absorption spectroscopy.
For molecules with more than one normal mode, we can study the potential wells involved in ...
- 163
5
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1
answer
914
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Is there an example of a closed shell molecule with a permanent ground state magnetic dipole?
It seems that molecules of point group C$_{n}$ and C$_{nh}$ can in principle support a permanent magnetic dipole moment (Barron, 2004). However, I cannot think of any closed shell molecules that ...
- 2,120
2
votes
2
answers
3k
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Dipole moment of symmetrical molecules
While studying dipole moment in organic chemistry, I got stuck at a particular statement written in the book :
Symmetrical molecules without lone pairs of electrons will have $\mu = 0.$
The main ...
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