1988•The Knowledge Bank (The Ohio State University)Requires access
VIBRATION-ROTATION SPECTRUM OF CARBON DIOXIDE-ACETYLENE
Diana G. Prichard, Rana Nandi, J. S. Muenter, Brian J. Howard
Open publisher page 0 citations
Abstract
The infrared spectrum of carbon dioxide-acetylene has been recorded in the three micron wavelength region by observing direct absorption of color center laser radiation by a pulsed molecular beam. The spectrum is that of a perpendicular transition in a moderately asymmetric prolate rotor. The vibrational origin is $3281.740 cm^{-1}$ and the rotational constants are $A^{\\prime \\prime}=8876, B^{\\prime \\prime}=2859, C^{\\prime \\prime}=2155, A^{\\prime}=8864, B^{\\prime}=2855$, and $C^{\\prime}=2154$ MHz. The axes of the two monomer molecules are parallel and the complex has $C_{2v}$ symmetry. The separation of the monomer units is 3.285 A. This geometry is readily predicted by considering the quadrupole-quadrupole interaction. Since the monomers have quadrupole moments of opposite sign, this configuration places positive regions of each monomer opposite negative regions of the other. A more detailed model of electrostatic interactions between distributed multipole moments will also be discussed.