The vibrationally averaged, temperature-dependent structure of polyatomic molecules. I. CO2

Abstract
A new high‐temperature nozzle has been added to our counting electron diffraction apparatus, enabling precise studies of the vibrationally averaged structure of molecules at temperatures between 300 and 1000 K. Our results for CO2 are compared with the harmonic theory and the recent variational wave function calculation of Kohl and Hilderbrandt. The new nozzle system is described, and differences between the data and the theories are discussed.