# CYCLOPROPANE-SULFUR DIOXIDE: MICROWAVE SPECTRUM AND STRUCTURE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/12449

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 Title: CYCLOPROPANE-SULFUR DIOXIDE: MICROWAVE SPECTRUM AND STRUCTURE Creators: Andrews, Anne M.; Hillig, K. W., II; Kuczkowski, R. L. Issue Date: 1991 Abstract: The microwave spectrum of the cyclopropane-sulfur dioxide van der Waals complex has been observed by Fourier transform microwave spectroscopy. The spectrum exhibited $a-$ and $c$-dipole selection rules; the c-type transitions were split into doublets of unequal intensity separated by about 200 kHz. The stronger and weaker c-type transitions were each fit independently with the $a$-type transitions using the Watson S-reduced Hamiltonian to rotational constants A = 6176.635(7) MHz, B = 1258.497(1) MHz, C = 1180.101(1) MHz for the stronger transitions and A = 6176.828(8) MHz, B = 1258.497(1) MHz, C = 1180.101(1) MHz for the weaker transitions. The complex has $C_{s}$ symmetry. The $C_{2}$ axis of sulfur dioxide lies in the CCC plane nearly parallel to a C-C bond with the oxygens straddling the plane; the center of mass of the sulfur dioxide is 3.31 {\AA} from the C-C bond center. The splittings in the spectrum suggest an internal rotation of the cyclopropane subunit."" URI: http://hdl.handle.net/1811/12449 Other Identifiers: 1991-RE-3