ps4_1987

ps4_1987 - MIT OpenCourseWare http://ocw.mit.edu 5.80...

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Unformatted text preview: MIT OpenCourseWare http://ocw.mit.edu 5.80 Small-Molecule Spectroscopy and Dynamics Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms . MASSACHUSETTS INSTITUTE OF TECHNOLOGY Chemistry 5.76 Spring 1987 Problem Set #4 1. Steinfeld, page 227, # 2. For the following molecules, give the point group symbol, dipole moment (zero or nonzero), and type of rotator (linear, symmetric top, and so on): (a) dichloromethane (CH 2 Cl 2 ); (b) planar nitrogen tetroxide (N 2 O 4 ), Ns and Os equivalent; (c) nitrogen tetroxide with the plane of one NO 2 at right angles to the other, Ns and Os equivalent; (d) ethane (C 2 H 6 ) opposed form, that is, with h ; (e) ethane, staggered form; (f) SF 4 , nonplanar, all Fs equivalent; (g) SF 4 , nonplanar, two pairs of equivalent Fs. 2. Steinfeld, page 257, # 2. The linear centrosymmetric four-atomic molecule (example: acetylene) was treated in Section 3. (a) Construct the U matrix of transformations between internal and symmetry coordinates for this system, from the definitions given by equations (8.14a)(8.14e). (b) Using the transformation given by (8.15), derive the G matrix elements from the Wilson, Decius, and Cross G matrix elements given in section 3....
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This note was uploaded on 11/28/2011 for the course CHEM 5.74 taught by Professor Robertfield during the Spring '04 term at MIT.

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ps4_1987 - MIT OpenCourseWare http://ocw.mit.edu 5.80...

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