RELATIVE INTENSITIES OF TOTALLY SYMMETRICAL VIBRATIONS IN THE RAMAN SPECTRUM OF COMPLETELY DEUTERATED NEOPENTANE IN THE GASEOUS STATE
lntensities of the Raman lines of the totally symmetric vibrations of neopentane C(CH/sub 3/)/sub 4/ and deuterated neopentane C(CD/sub 3/)/sub 4/ in the gaseous state are determined photographically relative to the intensity of the v/sub 1/ line of CF/sub 4/ ,used as an internal standard. Assuming the simple Wolkenstein bond-polarizability theory, observed intensities are used to derive complete force -fields for the totally symmetric class of vibrations, and it is found that no such field can account satisfactorily for all the intensities as well as all the frequencies. The simple Wolkenstein theory is thus shown to be inadequate. Knowledge of the intensities of C(CD/sub 3/)/sub 4/permits for the first time a test of the modification of the theory in which Wolkenstein's assumption, that the polarizability of a bond is not affected by a change of bond orientation, is abandoned. Using an improved 4paraimeter field, the modified theory is found to succeed where the simple theory fails. (auth)
- Research Organization:
- Oxford Univ.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-004179
- OSTI ID:
- 4812816
- Journal Information:
- Proc. Roy. Soc. (London), Vol. Vol: A, 264; Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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