Vinyl aluminate

While most of the hydroboration methods resulted in the formation of p-substituted species, a rare example of an addition reaction that formed the a-substituted vinylboronate has been reported (Example 6.6) [78], The overall reaction was a two-step process that proceeds through the initial formation of a vinyl aluminate that was quenched by the addition of methoxy(pinacolato)borane. The reaction was highly regioselective, and less than 2% of the p-substituted product was formed. In addition to the functionalization of styrene, other arylalkynes as well as alkylalkynes were converted into a-substituted vinylboronates in high yield with outstanding selectivity. 

Carboxymethylcellulose, polyethylene glycol Combination of a cellulose ether with clay Amide-modified carboxyl-containing polysaccharide Sodium aluminate and magnesium oxide Thermally stable hydroxyethylcellulose 30% ammonium or sodium thiosulfate and 20% hydroxyethylcellulose (HEC) Acrylic acid copolymer and oxyalkylene with hydrophobic group Copolymers acrylamide-acrylate and vinyl sulfonate-vinylamide Cationic polygalactomannans and anionic xanthan gum Copolymer from vinyl urethanes and acrylic acid or alkyl acrylates 2-Nitroalkyl ether-modified starch Polymer of glucuronic acid... 

Focusing collectors are usually cast acrylic Fresnel lenses, or mirrors of aluminized polyester film in frames of aluminum. These reflectors are either enclosed in a bubble of poly(vinyl fluoride) film, or under polycarbonate glazing, which may be covered with a fluorocarbon film to reduce the reflectivity. The absorbers for active systems are copper or aluminum since the temperatures are too high (325—370°C) for plastics. The frames, however, can be molded ABS, high density polyethylene or polyurethane, either solid or structural foam. Polybutylene or chlorinated PVC can be used for piping hot water, and tanks can be made of either reinforced polyester or blow- or rotational-molded, high density polyethylene (12—15). 

Abrasives - [ALUMINUMCOMPOUNDS - ALUMINIUMOXIDE(ALUMINA) - CALCINED,TABULAR, AND ALUMINATE CEMENTS] (Vol 2) -m automobile polishes [POLISITES] (Vol 19) -for dental materials [DENTAL MATERIALS] (Vol 7) -for enameling [ENAMELS, PORCELAIN OR VITREOUS] (Vol 9) -nitrides as [NITRIDES] (Vol 17) -particle shape classification m [SIZE MEASUREMENT OF PARTICLES] (Vol 22) -phenolic resins PHENOLIC RESINS] (Vol 18) -PVB m [VINYL POLYMERS - VINYL ACETAL POLYMERS] (Vol 24) -silicon carbide m [CARBIDES - SILICONCARBIDE] (Vol 4) -standards and specification [MATERIALS STANDARDS AND SPECIFICATIONS] (Vol 16) -use m cosmetics [COSMETICS] (Vol 7) -use m electroplating cleaning pLECTROPLATING] (Vol 9)... 

Allenic alcohols T reatment of the propargylic alcohol 1 with lithium aluminum hydride does not lead to the expected vinyl allenic alcohol 2 (3,99). However, addition of solid iodine to the intermediate aluminate does effect the desired elimination to give 2. This result was unexpected because addition of a solution of iodine in THF lends to a vinyl iodide (3). This sequence provides a general synthesis of (hydroxymcthyl)allcncs (second example). 

The stereocontrolled synthesis of alkenes and the use of vinyl- and alkyl-aluminum and -aluminate reagents as nucleophiles has been described above. In addition, the aluminum reagents are also useful in diene synthesis, in reactions with enones and epoxides, and in cyclizations. 

SODIUM ALUMINATE or SODIUM ALUMINATE SOLUTION (45% or less) or SODIUM ALUMINUM OXIDE (1302-42-7 1138-49-1) AlOj Na Noncombustible solid. Aqueous solution is a strong corrosive base. Violent exothermic reaction with acids. Incompatible with aluminum, organic anhydrides acrylates, alcohols, aldehydes, alkylene oxides, substituted allyls, cellulose nitrate, chlorocarbons, copper, cresols, caprolactam solution, chlorocarbons, epichlorohydrin, ethylene dichloride, isocyanates, ketones, glycols, nitrates, phenols, phosphoms, tin, vinyl acetate, zinc. Exothermic decomposition with maleic anhydride. May increase the explosive sensitivity of nitromethane. Attacks aluminum, copper, tin, and zinc. On small fires, use dry chemical powder (such as Purple-K-Powder), sand, or COj extinguishers. Avoid the use of water or foam. 

Hectorite Polyacrylamide Polyethylenimine Potassium alum anhydrous Sodium aluminate Sodium polystyrene sulfonate Sodium poly (vinyl sulfonate) flocculation... 

Boiler scale remover Methyl vinyl United States 2,723,956 1955 National Aluminate... 

Aluminous cement modifiers N-Vinyl-morpholine, A-vinyl-pyrrolidone, A-vinyl-2-oxazinidinone, N-vinyl-2-oxazolidinone United States 3,140,269 1964 Dow Chemical... 

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