ps4_1991

ps4_1991 - 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 1991 Problem Set #4 Some problems [indicated] were taken from various chapters of Molecules and Radiation by J. I. Steinfeld, Harper & Row, 1974 1. [Steinfeld, Ch. 7, #1] 2. [Steinfeld, Ch. 8, # 2] 3. [Steinfeld, Ch. 8, # 4] 4. [Steinfeld, Ch. 8, # 6] 5. [Steinfeld, Ch. 8, # 8] 6. 16 O12 C32 S is a linear molecule. The bond lengths are rCO = 1.16Å rCS = 1.56Å and the observed fundamental vibrational frequencies are ν1 = 858.9 cm−1 stretch ν2 = 520.4 cm−1 bend ν3 = 2062.2 cm−1 stretch. (a) Obtain kCS , kCO , and kθ [rCO rCS ]−1 in dynes/cm. (b) What are the amplitudes for C-O and C-S stretch in the ν1 fundamental level? (c) What are the vibrational frequencies for 18 O12 C32 S? 7. [Steinfeld, Ch. 9, #1] ...
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