Chemical structures fluorinating reagents

More pertinent to the interests of fluoro-organic chemists, a number of compounds bearing a single N—F bond have become useful electrophilic fluorination reagents, i.e., behaving as effective sources of F+. The structures of some of them are given below, along with the chemical shifts for the N—F fluorine substituent. 

N.m.r. Studies involving Fluorinated Chemical Shift Reagents.— The determination of the cis-trans composition of methyl elaidate-oleate [Eu(fod)3] assignment of diastereotopic protons in amphetamine [Euffodls] " induced shifts of anils [Euffod)]] conSguration of 4-substituted-2-hydroxy-4-butanolides [Eu(fod)3] structure ofthietan 1,1-dioxide derivatives [Eu(fod)3l ... 

A fundamental property of fluoropolymers is their resistance to organic and inorganic chemicals (Fig. 12.1). Increased content of fluorine enhances the chemical resistance of the polymer. The overwhelming majority of the applications of fluoropolymers take advantage of their inertness to chemicals. Chemical properties of fluoropolymers are not affected by fabrication conditions. Another aspect of the interaction of these plastics with chemicals is permeation. Even though a reagent may not react with a fluoropolymer, it may be able to permeate through the polymer structure. The extent and rate of permeation is dependent upon the structure and properties of the plastic article as well as the type and concentration of permeant. Temperature and pressure usually influence the permeation process. This chapter reviews chemical compatibility of fluoropolymers and their permeation behavior towards different chemicals. 

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