Knowledge Bank

Microwave spectroscopy was used to characterize 1,1-difluoroethylene ozonide $(F2COOCH2O)$, ethylene ozonide $(H2COOCH2O))$, carbony1 fluoride and formaldehyde as the main volatile products form the Ozonolysis of 1,1- difluoroethylene. Microwave spectra of 1,1-difluoroethylene ozonide in the ground state and two excited vibrational states were observed. A rigid rotor fit gave the following ground state rotational constants (MHz): $A=4966.52(1),B=2570.64(1)$ and $C=2456.79(1)$. Rotational constant estimates of 14 pseudorotational ring conformers are consistent with the experimental rotational constants. Radio frequency double resonance searches for the near prolate ring conformer spectra indicate only one predominant conformation at dry ice temperatures.""