Fluorinated peroxides, structure

NQR, 22 216 olefin complexes of, 4 85 in organogermanium compounds, 27 141,143 oxyfluoride, properties of, 11 29 pentacarbonyl dimets of sulfur oxydifluoride imide, 19 203-205 pentafluoride, structure, 27 102 peroxides, 6 325-326 phthalocyanine, 7 54 physical properties of, 11 18 polysulfide complexes, 31 100, 102 envelope conformation, 31 115 synthesis, 31 103-104 [Pt[15]aneS5) f, 35 75, 77 reaction with fluorinated peroxides, 16 120 salts, lattice energy and thermochemistry, 22 52-56... 

A common structural motif in peroxides of the type R3C—O —0°—Y (R = alkyl, aryl, fluorine, Y = R3C or H) is a marked distortion of the R3C fragment from tetrahedral geometry. The R—C bond, which is located in the C—O —plane, exhibits the smallest of the three R—C—O angles (Table 4) °. This tetrahedral distortion has been interpreted, on the basis of an electron population analysis, with a ctr c [Pg.103]

Fluorinated Polymeric Peroxides. 1.1,4 4-Tetrafluorobutadiene is shaken with 0 under pressure at RT to produce polymeric peroxides contg as units the structures [CF2 CH CHCF200] and [CH(CH CF3)CF200]. The amt of 0 in the copolymers may be varied over wide limits. The polymers are white solids, sol in N CO, which liberate iodine from KI in aqueous Me3C0 and explode at 122°C. They are useful in rocket propellants Ref J L. Anderson R.C. Putnam, [JSP 2971949(1961) CA 55, 14918(1961)... 

Fluorine Miscellaneous materials, 4304 Magnesium perchlorate Cellulose, etc., 4078 /V-Meth yI morpholine oxide, 1991 Nitric acid Cellulose, 4430 Perchloric acid Cellulose and derivatives, 3992 Perchloric acid Hydrofluoric acid, Structural materials, 3992 Potassium chlorate Cellulose, 4011 Potassium nitrate Cellulose, 4645 Sodium chlorate Paper, etc., or Wood, 4033 Sodium nitrate Fibrous material, 4716 Sodium nitrite Wood, 4715 Sodium peroxide Fibrous materials, 4797 Zinc permanganate Cellulose, 4705 BLEACHING POWDER Wood perchlorates Organic matter See SUGARS... 

Pristine SWCNTs and their fluorinated derivatives, F-SWCNTs, were reacted with organic peroxides to functionalize their sidewalls covalently by attachment of free radicals (Scheme 1.15). The tubes reactivity towards radical addition was compared with that of corresponding polyaromatic and conjugated polyene JT-systems [150, 151]. The characterization of the functionalized SWCNTs and F-SWCNTs was performed by Raman, FT-IR and UV/Vis/NIR spectroscopy and also by TGA/MS, TGA/FT-IR and with TEM measurements. The solution-phase UV/Vis/NIR spectra showed complete loss of the van Hove absorption band structure, typical of functionalized SWCNTs [150]. 

Most commercial fluorocarbon elastomers have brittle points between -25°C (-13°F) and -40°C (-40°F). The low-temperature flexibility depends on the chemical structure of the polymer and cannot be improved markedly by compounding. The use of plasticizers may help somewhat, but at a cost of reduced heat stability and worsened aging. Peroxide-curable polymers may be blended with fluorosilicones, but such blends exhibit considerably lower high-temperature stability and solvent resistance and are considerably more expensive than the pure fluorocarbon polymer. Viton GLT is a product with a low brittle point of -51°C (-59°F) [48]. Tecnoflon for containing a stable fluorinated amide plasticizer reportedly exhibits improved low-temperature hardness, brittle point, and compression set without sacrificing physical properties [66]. Low-temperature characteristics of selected fluorocarbon elastomers are listed in Table 5.13 [9]. 

Fluoroelastomers are copolymers containing fluorine in their structure. There are different kinds of fluoroelastomers depending on the chemical composition and on the production in which the comonomers are found in the chain. As examples of comonomers, we can mention vinylidene fluor-ide-hexafluoropropylene and vinylidene fluoride-chlorotrifluoroethylene. The vulcanization process is performed using peroxides, diamines, and bisphenol. 

Key Words Ethylene oxide, Propylene oxide. Epoxybutene, Market, Isoamylene oxide. Cyclohexene oxide. Styrene oxide, Norbornene oxide. Epichlorohydrin, Epoxy resins, Carbamazepine, Terpenes, Limonene, a-Pinene, Fatty acid epoxides, Allyl epoxides, Sharpless epoxidation. Turnover frequency, Space time yield. Hydrogen peroxide, Polyoxometallates, Phase-transfer reagents, Methyltrioxorhenium (MTO), Fluorinated acetone, Alkylmetaborate esters. Alumina, Iminium salts, Porphyrins, Jacobsen-Katsuki oxidation, Salen, Peroxoacetic acid, P450 BM-3, Escherichia coli, lodosylbenzene, Oxometallacycle, DFT, Lewis acid mechanism, Metalladioxolane, Mimoun complex, Sheldon complex, Michaelis-Menten, Schiff bases. Redox mechanism. Oxygen-rebound mechanism, Spiro structure. 2008 Elsevier B.V. 

This compound was first prepared by J. W. Dale and D. A. MacLeod of the Defense Research Chemical Laboratories, Ottawa, Canada. The only publication is that of Harvey and Bauer who determined its structure by electron diffraction and who used the name disulfur decafluorodioxide. The substance was obtained as a minor product of the combustion of sulfur in fluorine. It is diamagnetic and has the structure of a peroxide with the structural parameters rSF = 1.56 0.02 A, r0o = 1.47 zb 0.03 A, rso = 1.66 0.05 A, ZSOO = 105 3°, dihedral angle SOOS (looking along... 

Xe NMR spectrum shows the expected nine-line spectrum due to coupling with the eight equivalent equatorial fluorine atoms at -1-3131 ppm (downfield) from elemental xenon.IR spectrum (solid) 787 (m), 725 (vs), 700 (s), 612 (s), 550 (m), 430 (s) cm" . Its molecular structure has been determined by X-ray crystallography. Pyrolysis of the compound yields FjSeOSeFj, whereas photolysis gives the corresponding peroxide FjSeOOSeFs. ... 

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