Perfluoropropylene oxide

On strong heating with sulfur tnoxide, perfluoropropylene oxide reacts to furnish two major products, 1,2-perfluoropropylene sulfate and 2-oxoperfluoro-... [Pg.403]

Fluorinated oxiranes are hydrolyzed to give a-oxo acids. For example, perfluoropropylene oxide is hydrolyzed to give 3,3,3-trifluoro-2,2-dihydroxypropanoic acid (31).153 154... [Pg.416]

Carbomethoxymethylene or benzoylmethylene triphenylarsorane reaction with perfluoropropylene oxide to give the corresponding fluorinated ylides (27). The following mechanism was suggested (44) ... [Pg.124]

Examples of rod-like molecules with a branched fluorinated chain at one end (compounds 90-93) are collated in Fig. 26 [166]. It is interesting that smectic phases are retained despite the significant size of these chains. This is mainly a result of the intercalation of the aromatic cores and aliphatic spacers of these molecules, which can compensate this steric distortion. These branched chains remove the B and E phases with crystalline layers and replace them by fluid smectic phases, including SmC phases. The comparison in this figure also shows that the bulky and flexible bis(perfluoropropylene oxide) derived chains (compounds 92, 93) can provide LC materials with especially low melting points and broad mesophase ranges due to the higher conformational flexibility of perfluoroethers compared to linear perfluoroalkyl chains [99, 176]. [Pg.40]

The second step concerns the addition of perfluoroethylene oxide (TFEO) or perfluoropropylene oxide (HFPO) according to the following reactions [44,45,46] ... [Pg.114]

Reaction of Sulfur Trioxide with Perfluoropropylene Oxide... [Pg.13]

Perfluoropropylene oxide reacts with sulfur trioxide and gives two compounds, B and C. What are their structures ... [Pg.13]

What is the product X of the reaction of perfluoro-y-butyrolactone with perfluoropropylene oxide in the presence of cesium fluoride ... [Pg.21]

What reaction takes place between 1,2-dichlorodifluoroethylene and perfluoropropylene oxide What are the products N and O ... [Pg.32]

The reaction starts undoubtedly by opening of the lactone ring by cesium fluoride to form cesium salt of 4-hydroxyperfluorobutyryl fluoride. The anion of this intermediate opens the ring of perfluoropropylene oxide at the central carbon. Expulsion of fluoride anion from the terminal difluoro-methylene group converts the intermediate to the difluoride of perfluoro-... [Pg.77]

At the temperature of 180-200°C, perfluoropropylene oxide ejects diflu-orocarbene and forms N, trifluoroacetyl fluoride (general method for the preparation of difluorocarbene). Difluorocarbene adds to 1,2-dichlorodi-fluoroethylene and yields 0,1,2-dichloroperfluorocyclopropane [121]. [Pg.103]

PROPYLENE OXIDE (DOT) OXIRANE, TRIFLUORO-(TRIFLUOROMETHYL)- PERFLUORO(METHYLO-XIRANE) PERFLUOROPROPYLENE OXIDE PROPANE, l,2-EPOXY-l,l,2,3,3,3-HEXAFLUORO- PROPYLENE OXIDE HEXAFLUORIDE (TRIFLUORO-xMETHYL)TRIFLUOROOXIRANE TRIFLUORO-(TRIFLUOROMETHYL)OXIRANE... [Pg.718]

Aziridine 12 was obtained as a by-product in the reaction of imine 13 and CF2 derived from perfluoropropylene oxide to give 14 (79IZV1826). It is unclear whether the reaction mechanism includes the addition of. CF2, the most electrophilic dihalogenocarbene, onto the C=N bond of imine 13. [Pg.100]

Such ionic clusters have been studied in ionomers such as Naflon poly(perfluoropropylene oxide sulfonic acid) membranes clusters in ionomers have been reviewed recently by Mauritz and Hopfinger ( 7). These reviewers also quote a model for hydrated Naflon proposed by T. D. Gierke at the October, 1977, meeting of the Electrochemical Society, Atlanta, Georgia, in which aqueous spher-... [Pg.352]

The chemical reactions reported by duPont appear to involve the reaction of perfluoropropylene oxide and 3 - sultones to form sulfonic acid resins. The functional group monomers are generated as follows (52) ... [Pg.340]

The fluorinated heterocyclic compound with the greatest commercial use has been perfluoropropylene oxide, (HFPO, I). It has been used as both a monomer and as an intermediate. There have been many syntheses of HFPO, but virtually all of them consist of the oxidation of hexafluoropropylene (Eq. 13.1). [Pg.493]

Poly(DL-lactic acid-6-perfluoropropylene oxide carbon dioxide 2007EDM... [Pg.313]

Poly(perfluoropropylene oxide) acid sorbitol ester ... [Pg.410]

Trade Name Synonyms Cyracure UVR-6216 t[Dow http //www.dow.com] 1,2-Epoxy-1,1,2,3,3,3-hexafluoropropane CAS 428-59-1 EINECS/ELINCS 207-050-4 Synonyms Acetone, hexafluoro Hexafluoroepoxypropane Hexafluoro-1,2-epoxypropane Hexafluoropropene epoxide Hexafluoropropene oxide Hexafluoropropylene oxide Oxirane, trifluoro (trifluoromethyl)- Perfluoro (methyloxirane) Perfluoropropylene oxide Propane, 1,2-epoxy-1,1,2,3,3,3-hexafluoro-Propylene oxide hexafluoride ... [Pg.1642]

Recently, Hillmyer et al. reported that unique molecular assemblies such as multicompartment wormlike and hamburger micelles were formed from some ABC star-branched polymers composed of water-soluble poly(ethylene oxide) (PEO) and fluorophilic poly(perfluoropropylene oxide) segments [261, 262]. [Pg.119]

Amphiphilic miktoarm stars of the typ>e ABC, where A is polyethylene (PE), B is polyethylenoxide (PEO), and C is poly(perfluoropropylene oxide), were also prepared via anionic polymerization, using arm in-out methodology " (Scheme 16). At the first step of the synthetic process, anioni-cally prepared PBd was temunated with a heterobifunctional proteaed agent. The resulting hydroxyl end-functionalized PBd was then hydrogenated to an end-functionalized polyethylene (PE) block, which served as a macroinitiator (Ml) for anionic... [Pg.38]

Octamethylene dibromide 2968 Palmitoleic acid 5757 Perfluoropropylene oxide 10424... [Pg.713]

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