ethoxide वाक्य
उदाहरण वाक्य
मोबाइल
- The basicity of sodium ethoxide is such that it cannot fully deprotonate either of the ketones, but can produce small amounts of the sodium enolate of both ketones.
- When 2-bromo-2-methylbutane is treated with potassium " t "-butoxide instead of sodium ethoxide, the Hofmann product is favored.
- Sodium ethoxide may either deprotonate the ?-position of an ester molecule, forming an enolate, or the ester molecule may undergo a nucleophilic substitution called transesterification.
- The article on "'niobium ( V ) ethoxide "'was started by, likely by " borrowing " the ethanol article then blanking it.
- Gram-quantities were produced by the reduction of ethanol by sodium metal, followed by pyrolysis of the ethoxide product and washing with water to remove sodium salts.
- Basic conditions also increase the concentration of ethoxide ions, favouring the reaction as they are markedly more powerful nucleophiles for the substitution of chloride ligands than is the parent alcohol.
- In comparison, when sodium ethoxide is used, any nucleophilic attack at the carboxylate by the ethoxide will not give any side product; other alkoxide salts will cause scrambling by transesterification.
- In comparison, when sodium ethoxide is used, any nucleophilic attack at the carboxylate by the ethoxide will not give any side product; other alkoxide salts will cause scrambling by transesterification.
- Pyrolysis also produces a tantalum ( V ) oxide film by chemical vapor deposition in which case the tantalum ( V ) ethoxide is completely oxidised, producing carbon dioxide and water vapor:
- For this reason, the conjugate sodium alkoxide base of the alcohol formed ( e . g . sodium ethoxide if ethanol is formed ) is often used, since the alkoxide is regenerated.
- CDI can also be used for esterification, although alcoholysis requires heat or the presence of a potent nucleophiles as sodium ethoxide, The alcohol reaction can be used to form glycosidic bonds, as well.
- :All the above said, ethoxide, one of the alkoxides, is often used because it is an " extremely " strong base, and some reactions require that level of basicity.
- Materials can be coated with a thin film of niobium ( V ) oxide chemical vapor deposition or atomic layer deposition processes, produced by the thermal decomposition of niobium ( V ) ethoxide above 350 �C.
- For example, the full negative charge associated with ethoxide, the conjugate base of ethanol, is most commonly accompanied by the positive charge of an alkali metal salt such as the sodium cation ( Na + ).
- If an alkoxide such as sodium ethoxide is used as base, deprotonation takes place only to the extent of about 0.1 % because acetone is a weaker acid than ethanol ( pK a = 16 ).
- Amorphous tantalum ( V ) oxide films can also be prepared by atomic layer deposition or by a pulsed chemical vapour deposition technique in which tantalum ( V ) ethoxide and tantalum ( V ) chloride are applied alternately.
- Ethoxide can be used as a base in organic ( non-polar ) solutions where Sodium Hydroxide ( OH-) would not dissolve ( as well ) .-- talk ) 01 : 18, 23 April 2008 ( UTC)
- In terms of mechanism, such reactions proceed via the nucleophilic addition giving a hemiaminal-C ( OH ) ( NHR )-intermediate, followed by an Titanium Ethoxide [ Ti ( OEt ) 4 ] have been shown to catalyse imine formation.
- For instance, determining nitrogen isotope effect along with hydrogen isotope effect was used to show that the reaction of 2-phenylethyltrimethylammonium ion with ethoxide in ethanol at 40 o C follows an E2 mechanism, as opposed to alternative non-concerted mechanisms.
- In other reactions, such as " some " nucleophilic substitution reactions, the point of the reaction is to add ethoxide to another molecule through an ether-like bond . talk ) 01 : 28, 23 April 2008 ( UTC)
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