All Questions
Tagged with symmetry spectroscopy
21
questions
12
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1
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16k
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Derivation of the Orgel diagram for octahedral d2 complexes
The Orgel diagram for a typical octahedral $\mathrm{d^2}$ complex is shown below:
(source: Kettle, Physical Inorganic Chemistry, p 146)
I understand that the right-hand half of the graph shows how ...
- 71.6k
2
votes
0
answers
119
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Are the $+\leftrightarrow+$ and $-\leftrightarrow-$ methanol rotational transitions dipole-allowed?
I am quite confused about the origin and justification of the rotational selection rules of methanol, and I would appreciate any help or references. As far as I understand, there are three irreducible ...
user37085
13
votes
2
answers
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Rule of mutual exclusion: is the converse true?
There is a "famous" rule in spectroscopy,1 that goes this way:
If a compound is centrosymmetric, then its normal vibrational modes cannot be simultaneously IR and Raman active.
and this is simple ...
- 71.6k
3
votes
0
answers
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How to tell if a vibrational mode in benzene is IR and/or Raman active?
Consider the vibrational mode that corresponds to the boat-like bending of a benzene ring. Is it (i) Infrared active? (ii) Raman active?
This question was asked in an assignment in my college. ...
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6
votes
1
answer
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Why are square planar coordination compounds with four different ligands optically inactive?
Why do square planar coordination compounds of type $\ce{[Mabcd]}$ not show optical activity, although they contain 4 different ligands (i.e. chiral central metal atom)?
4
votes
1
answer
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General methods of Analysis for FTIR Results
What can we say about a molecule from the position and number of bands in FTIR spectrum. I know that the more symmetric a molecule is, the less number of bands it has. What else can we say, for ...
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