Monday, June 4, 2018

Sodium Ethoxide - Preparation, Chemical Properties & Application

Sodium ethoxide (additionally is the natural compound with the equation C2H5ONa) is a
white to yellowish powder that breaks down in polar solvents, for example, ethanol. It is
usually utilized as a strong base. Similarly, 2-Amino-pyridine also has a chemical equation,
i.e., H2NC5H4N.


There are many other chemicals which are colourless like 2-Amino-pyridine:

Related image


Preparation Of Sodium Ethoxide:


An alcoholic solution of sodium ethoxide is very acquired by gradually including thin pieces of metallic sodium more than supreme
ethanol. The heat given out amid the response makes the alcohol to boil, and the preparation
should, in this manner, be done under a reflux condenser. To isolate the strong ethoxide from
alcohol, the alcoholic solution must be refined in a current of hydrogen from a copper retort,
the last hints of alcohol not being lost underneath 200° C.


At the point when the dry product is required, it is best to prepare sodium powder as fine as
possible by the technique given above, utilizing 250 ml of xylol, for every 23 g. of sodium.


The xylol and sodium are then put in a jar gave a reflux condenser and stirring bar, cooled
with ice, and the calculated amount of liquor, weakened with two volumes of xylol, added
gradually. At the point when all the alcohol has been included, and the rough reaction has
died down, it is heated delicately to finish the reaction. The sodium ethoxide got shapes
a snow-white, precipitate which demonstrates greater reactivity than that arranged by
different strategies.


Preparation Of 10% Sodium Ethoxide Solution:


A 2ooo ml flask outfitted with a dropping pipe and a productive condenser secured with
a calcium chloride tube is accused of 23 g (1 mole) of freshly cut sodium. Amid the addition of ethanol, it is beneficial, if not fundamental, to pass a moderate stream of dry nitrogen into the flask amid the reaction. Three hundred ml of supreme alcohol is permitted to keep running in intermittently, the rate of expansion is with such that fast refluxing is kept up. After all the alcohol has been included, the blend is heated to the point when the sodium has reacted entirely. The procedure takes 2-3 hours. Sodium methoxide solution can be set up similarly.


Chemical Properties:


  • Formula - C2H5NaO
  • Formula Weight - 68.05
  • Flash Point - 20°(68°F)
  • Density - 0.868
  • Refractive Index - 1.3875
  • Storage & Sensitivity - Moisture Sensitive. Air Sensitive. Ambient temperatures.
  • Solubility - Miscible with alcohol.


Application:


Sodium ethoxide, 21% w/w in ethanol is utilized as a solid base in natural synthesis. It discovers application in different chemical reactions, for example, buildup, esterification, alkoxylation, and etherification.  It is a critical beginning material for the synthesis of ethyl ester and diethyl ester of malonic acid. In Williamson ether synthesis, it responds with ethyl bromide to form diethyl ether.

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