130312-65-1

Upstream product

• 148875-98-3 1,1,1,3-tetrabromo-3,3-difluoropropane 
• 1993-81-3 ethyl-1,3-dibromo-3,3-difluoropropyl ether 
• 105836-29-1 ethyl 3-bromo-3,3-difluoropropanoate 

Relevant academic research and scientific papers

High Resolution Fourier Transform Infrared Spectrum of Difluoroethyne, FCCF.

Difluoroethyne, monitored by FTIR spectroscopy, has been prepared in the vapour phase by vacuum pyrolysis and photolysis of difluoromaleic anhydride and pyrolysis of 3-bromo-3,3-difluoropropanoic trifluoroactic anhydride.The infrared spectrum of difluoroethyne has been assigned at both low and high resolution and wavenumber values for all five fundamentals estimated.Difluoropropadienone was observed as a pyrolysis product and difluorocyclopropenone as a photolysis product.

MICROWAVE SPECTRUM, STRUCTURE AND DIPOLE MOMENT OF DIFLUOROPROPADIENONE

The microwave spectra of the normal and two monosubstituted isotopomers of difluoropropadienone were observed and assigned in the 26.5-40.0 GHz frequency region.For the normal species, the rotational constants were determined to be A=11558.126 +/- 0.004, B=2023.911 +/- 0.001 and C=1720.649 +/- 0.001 MHz.Comparably precise results were obtained for the carbonyl 13C and 18O species.Stark effect measurements led to a total electric dipole moment of μT=0.671 +/- 0.012 D with components of μa=0.418 +/- 0.013 D and μb=0.525 +/- 0.003 D.In contrast with the parent propadienone molecule, the difluoro species shows no evidence of large amplitude tunneling motions.However, the data show clearly that the molecule is strongly distorted from C2v symmetry with a cumulenone chain that is bent similarly to that in propadienone.