classes_Spring08_172ID39_midterm2008

classes_Spring08_172ID39_midterm2008 - 4 35 points For one...

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1 Chemistry 172/273 Midterm April 30, 2008 Spring 2008 The exam has a total of 2 pages. Total: Note: Do not use a pencil. Use black ink only. Try to write as neatly as possible. If I don’t understand your handwriting, you will not get any points. Consider the following two structures for BBr 3 : 1. ( 10 points ) Determine the point group for each molecule. 2. ( 10 points ) List all the symmetry operations for each molecule. 3. ( 10 points ) Determine the number of normal modes of vibration.
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Unformatted text preview: 4. ( 35 points ) For one of the structures of your choice determine the representation corresponding to the normal modes of vibration. Indicate which modes are IR active and which modes are Raman active. 5. ( 15 points ) For the other structure (not the same as that chosen at point 5) determine the representation for the B-Br stretching modes. Indicate which modes are IR active and which modes are Raman active. 2...
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classes_Spring08_172ID39_midterm2008 - 4 35 points For one...

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