- #1
ampakine
- 60
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Heres the reducible representation made by counting the number of bonds left unchanged by each symmetry operation of water:
[PLAIN]http://img808.imageshack.us/img808/704/red0.png
and here's the irreducible representations extracted from it:
http://imageshack.us/m/695/3829/red01l.png
in the book Inorganic Chemistry by Housecraft it states that "This result tells us that there are two non-degenerate stretching modes, one of A1 symmetry and one of B2 symmetry."
I don't understand how that result tells you anything about the number of stretching vibrational modes in the molecule. For a slightly more complex molecule SO3 here's the reducible representation you get from the bonds:
http://imageshack.us/m/821/323/red1t.png
and here's the IRs extracted from it:
http://imageshack.us/m/155/9027/red11.png
so what does this result tell you? Does that mean that SO3 has 3 stretching vibrational modes?
[PLAIN]http://img808.imageshack.us/img808/704/red0.png
and here's the irreducible representations extracted from it:
http://imageshack.us/m/695/3829/red01l.png
in the book Inorganic Chemistry by Housecraft it states that "This result tells us that there are two non-degenerate stretching modes, one of A1 symmetry and one of B2 symmetry."
I don't understand how that result tells you anything about the number of stretching vibrational modes in the molecule. For a slightly more complex molecule SO3 here's the reducible representation you get from the bonds:
http://imageshack.us/m/821/323/red1t.png
and here's the IRs extracted from it:
http://imageshack.us/m/155/9027/red11.png
so what does this result tell you? Does that mean that SO3 has 3 stretching vibrational modes?
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