Acidity of Trifluorinated Alcohols and Saponification Rates of their Acetates

The Molecular Structure of Perfluorocarbon Polymers. Infrared Studies on Polytetrafluoroethylene1

“…19°Transition.-The 625 cm.-1 component of the doublet at 638, 625 cm.-1 has been reported to be absent at 0°and nearly equal in intensity to the 638 cm.-1 band at 50°. 3 Our study shows the changes in the 625 and 638 cm. "-1 bands to be associated with the first-order transition that occurs Temp., °C.…”

α,ω-Difunctional Perfluorinated Spacer Arms for Polymeric Material Derivatization

“…The octafluoroalkyl moiety of the precursor 3 exerts a strong inductive and hyperconjugative effect that acts on the physical and chemical properties of the terminal hydroxyl functions. The marked influence of trifluoromethyl groups, and higher homologs, on the dissociation constants of alcohols is well established. , Moreover, the deactivating effect of perfluoroalkyl residues on the nucleophilicity of alcohols and derived alkoxides has been pointed out in several cases . Amongst the methods recently described for preparing polyfluoroalkyl ethers, we have adopted the classical Williamson synthesis using sodium alkoxide as the nucleophile and an alkyl bromide as the electrophile …”

Phenylethynylpentafluorobenzene and phenylethynylpentachlorobenzene

“…Perfluorodiphenylbutadiyne (4).-Ethynylpentafluorobenzene (0.20 g, 1.04 mmol) and cuprous chloride (50 mg) were added to 10 ml of pyridine. Dry air was slowly bubbled through the mixture for 3 hr.…”