Accession Number:

AD0256306

Title:

CENTRIFUGAL STRETCHING IN SYMMETRIC-TOP MOLECULES AND THE STARK EFFECT OF CHLOROTRIFLUOROMETHANE

Descriptive Note:

Corporate Author:

GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s):

Report Date:

1961-05-02

Pagination or Media Count:

1.0

Abstract:

Detailed calculations of distortion constants, D sub JJ and D sub JK, were made for three molecules 1 CH3Cl, a typical methyl halide 2 CClF3, a molecule with bonding similar to that of CCl3F and 3 CHF3, a molecule with its center of mass within the CF3 tetrahedron. All three were found to obey existing distortion theory within the limits of experimental error. Theoretical distortion constants can be calculated from the molecular structure and the molecular force constants. A comparison of measured and theoretical constants for 9 symmetric-top molecules shows reasonable agreement for all except CCl3F and CHCl3, which are the only molecules considered having three identical nuclei with quadrupole moments. From Stark effect measurements on the J equals 1 to 2 transition, the molecular dipole moment of C-12 Cl-35F3 was assigned the value 0.50 or -0.01 debye. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE