alkoxide

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alkoxide

[al′käk‚sīd]
(organic chemistry)
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The first step involves the reaction of a metal halide or a metal alkoxide with an organic oxygen donor (such as alcohols, ether, etc.
Even so, Mo, Ta, and Ti are often deposited via LPCVD from their pentachlorides, and metal halides are often used with metal alkoxides.
They are most often produced by a low temperature sol-gel hydrolysis-condensation reaction from silicon alkoxides (12).
In slurries where silicon alkoxides are used as binder, an increase in pH (from the dissolution of components and/or water moisture adsorption from the environment) reduces the slurry lifetime.
Metal alkyls, alkoxides, chlorides and amides all undergo grafting on hydroxylated surfaces with liberation of a protonated ligand and formation of one or more covalent bonds to surface oxygens.
The development of new hybrid materials is typically performed by combining metal alkoxides and organic oligomer/polymers via the general sol-gel approach [8-12], Inorganic-organic hybrids with crosslinkable functional groups, such as acrylate/methacrylate or epoxy, can also be used in various applications such as electronics, dental restoration/adhesion, etc.
According to the company, the new facility with a capacity to produce more than 60,000 metric tons yearly will deliver ready-to-use alkoxides for use as catalysts in biodiesel production from renewable raw materials primarily to the Argentine and Brazilian markets.
In some cases, silicon alkoxides react prematurely and this leads to precured or precrosslinked polymer latexes.
The precursors normally used for the synthesis and doping of nanoparticles are organic alkoxides, acetates or acetylacetonates as well as inorganic salts such as chlorides.
In general, alkoxides can be easily exchanged with an allylic alcohol under suitable reaction conditions.
Opening chapters discuss reaction of alcohols with carboxylic acids and their derivatives, use of tin and other metal alkoxides, conversion of carboxylic acids into esters without use of alcohols, and the ester interchange reaction.
In sol gel chemistry, the metal alkoxides convert to amorphous gels of metal oxides through hydrolysis and condensation reactions.