Tetrakis ethylene, oxidation

Poly(methoxybiphenyl tetrakis(ethylene oxide) methacrylate)... 

The kinetics and mechanism for oxygen transfer between 4-cyano-V,V,-dimethylaniline V-oxide and a C2-capped mexo-tetraphenylporphyrinatoiron(III) and mc5 o-tetrakis(pentafiuorophenyl)-porphyrinatoiron(III) have been established. Addition of a copper(II) porphyrin cap to an iron(II)-porphyrin complex has the expected effect of reducing both the affinities and rate constants for addition of dioxygen or carbon monoxide. These systems were studied for tetradecyl-substituted derivatives solubilized by surfactants such as poly(ethylene oxide) octaphenyl ether. ... 

The tetrakis-sulphoxides (67) have been reported as a new type of PT catalyst in a solid-liquid mode, for example in 5n reactions of 1-bromo-octane. Nucleophilic substitutions of 1-bromo-octane and benzyl bromide are again the test reactions in a report on the use of the sucrose-ethylene oxide adducts (68a) as PT catalysts in both solid-liquid and liquid-liquid modes. The methacrylate ester derivative (68b) has been polymerized to a cross-linked gel that acts in a TC capacity for the same reactions. In a related approach some modified dextran anion exchangers carrying lipophilic substituents, such as the modified hydroxypropylated dextran gel shown in (69), have been synthesized and shown to catalyse displacement reactions including the alkyl bromide to iodide transformation under TC conditions. ... 

VITThen tetrakis(dimethylamino)ethylene (TMAE) is autoxidized, it chemiluminesces with the reaction catalyzed by proton donors (12). The 1-octanol-catalyzed reaction has been studied in detail at 30°C. (2, 3, 8). The over-all oxidation (11) can be written as the sum of two reactions ... 

Tetrakis(dimethylamino)ethylene (TKDE) is a strong electron donor which oxidizes to radical-cation and dication states similar to the well-known Wurster s radicals. Cyclic... 

The anodic behavior of A -substituted alkenes can be described as the oxidation of an electron-rich double bond. Tetraamino-substituted alkenes are extremely easily oxidized. Tetrakis(dimethylamino)ethylene exhibits two reversible one-electron processes at —0.75 and —0.61 V vs. SCE at a dropping mercury electrode in acetonitrile [140]. The anodic behavior of A, A -dimethylaminoalkenes has been studied intensively by cyclic voltammetry and electron spin resonance (ESR) spectroscopy [141]. The anodically E° = 0.48 V vs. SCE) generated cation radical of l,l-bis(iV,iV-dimethylamino)ethylene is shown to undergo C-C coupling, forming l,l,4,4-tetrakis(A, iV-dimethylamino)butadiene, which subsequently is further oxidized to its dication at —0.8 V [141,142]. With vicinal diamino ethylenes, usually two reversible one-electron oxidations are observed [143], while gem-inal diamino ethylenes exhibit an irreversible behavior [141]. Aryl-substituted vicinal diamino ethylenes (endiamines) can undergo a double cyclization to give an indolo-oxazoline when oxidized at 0.4 V vs. SCE in acetonitrile in the presence of 2,6-lutidine [144] ... 

Melamine phosphate Tetrabromo-p-xylene Tetrakis (2-chloroethyl) ethylene diphosphate Triethyl phosphate flame retardant, polyimides Ethylenebis (tetrabromophthalimide) flame retardant, polymeric nylon Poly (pentabromobenzyl) acrylate flame retardant, polymeric PBT Poly (pentabromobenzyl) acrylate flame retardant, polymeric PET Poly (pentabromobenzyl) acrylate flame retardant, polymeric PP Poly (pentabromobenzyl) acrylate flame retardant, polymeric PS Poly (pentabromobenzyl) acrylate flame retardant, polymers Ammonium octamolybdate Dimelamine phosphate Ethylene diamine phosphate Melamine borate Melamine pyrophosphate Polydibromophenylene oxide Tris (2-chloropropyl) phosphate flame retardant, polymethyl methacrylate Dimelamine phosphate Diphenyl octyl phosphate... 

Sodium antimonate Tetrakis (2-chloroethyl) ethylene diphosphate flame retardant, thermoset polyesters Decabromodiphenyi oxide Melamine cyanurate Pentabromoethyibenzene Sodium antimonate Tris (2,3-dichloropropyl) phosphate... 

Alternatively, under strong reductive conditions, e.g. electrochemical reduction, arylpalladium(II) halide (XIII) is reduced to arylpalladium(0) which, upon the second oxidative addition, gives diarylpalladium(II) complex, also capable of undergoing reductive elimination of biaryl similarly to XIV [10]. Isopropanol [50-52], amines [4,17,52-54], hydrazine [55], tetrakis(dimethylamino)ethylene [18], hydroquinone [56], tetrabutylammonium ftuoride [57], formates [58-60], zinc [61-64], and molecular hydrogen [65] have been used as stoichiometric reductants. Electro-reductive homocoupling of aryl halides was also reported [10]. The most important methods for... 

A review has appeared on the synthesis and reactivity of (sUylamino) and (silyl-anilino)phosphines. The S5mthesis, derivatisation and coordination behaviour of the morpholine (69) and piperazine (70) derivatives have been described. They are formed from the appropriate amine with diphenylchlorophosphine, and both react with sulfur or selenium to give the chalcogenide, whilst reaction of (69) with paraformaldehyde leads to insertion of methylene into the P N bond to give the phosphine oxide. The reaction between ethylenediamine and diphenylchlorophosphine can lead to the bis-, tris- and tetrakis(diphenylphosphino)ethylene-diamines, depending upon the stoichiometry. The first two are oxidised in situ whist the latter, (71), is stable. A nickel complex of (71) has been shown to be active as a catalyst for ethylene pol5nnerisation. ... 

Pruett was the first to observe that the action of a halogen on a peraminoethylene (1) yielded a salt-like dihalide. Carrying out similar experiments with tetrakis(aralkylamino) ethylene (5), Kawano characterized the dication and identified the oxidation-state intermediate between ethylene and dication. When such oxidizing agents as iodine or silver salts were added to acetonitrile solutions of 5 the intense violet color characteristic of radical-cation 90 (A 517 m x. 

Tetrakis(trimethylgermyl)diphosphine has been prepared in quantitative yield by oxidatively coupling (Me8Ge)aPLi with ethylene dibromide. Methyl-lithium cleaves the Sn—P bond of (Me3Sn)sP to give the stannyl phosphide (Me3Sn)aPLi,-EtaO, whereas the tin rich bicyclic compound (84) results from McaSnHa and... 

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