Problem_Set_3_KEY_F2011

Problem_Set_3_KEY_F2011 - CHEM171 - Solutions to Homework 3...

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CHEM171 --- Solutions to Homework 3 1. a. A point (center of inversion), axis (rotation), or a plane (mirror plane) about which a symmetry operation is performed. b. An action, which if performed, leaves the object/molecule apparently unchanged. c. A classification dependent on the symmetry an object possesses. 2. ONCl only possesses a plane of symmetry (the plane that contains all three atoms). 3.
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4. (a) D 3h (b) O h (c) D 5h (d) I h , this polyhedron has 20 triangular faces and all contain a C 3 axis through them, such axis is also shared by another opposing triangular face. Therefore, if every C 3 axis belongs to two faces and there are a total of 20 faces, a total of 10C 3 axes must be present. 5. C 2 6. 1,3-dimethylallene = C 2 C u b a n e = O h 7. T d point group has 6 σ d planes and all pass through the central atom of the molecule but each σ d plane only passes through two corner atoms (vertices). These six
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This note was uploaded on 11/12/2011 for the course CHEM 171 taught by Professor Kaner during the Fall '06 term at UCLA.

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Problem_Set_3_KEY_F2011 - CHEM171 - Solutions to Homework 3...

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