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Sodium borohydride, also known as sodium tetrahydridoborate and sodium tetrahydroborate, [5] is an inorganic compound with the formula Na B H 4 (sometimes written as Na[BH 4]). It is a white crystalline solid, usually encountered as an aqueous basic solution. Sodium borohydride is a reducing agent that finds application in papermaking and dye ...
The borohydride anion is susceptible to reaction with even weak acids, resulting protonolysis of one or more B-H bonds. Protonolysis of sodium borohydride with acetic acid gives triacetoxyborohydride: [1] NaBH 4 + 3 HO 2 CCH 3 → NaBH(O 2 CCH 3) 3 + 3 H 2. Related reactions occur for hydrides of other electropositive elements, e.g. lithium ...
Hydrogenation (Adams' catalyst) gave alcohol 30, chromic acid oxidation gave ketone 31, sodium borohydride reduction stereoselectively gave alcohol 32, hydrolysis followed by acylation gave acetate 33, thionyl chloride treatment gave acyl chloride 34 and methyl cadmium the ketone 35. Cholesterol synthesis Woodward 2
[5] [3] The chemistry is very similar to that of electroless nickel-boron plating, and yields hydrogen gas and the corresponding sodium salt as byproducts. [5] The borohydride must be added gradually to the nickel salt solution, not the other way around, because the product catalyzes the hydrolysis of borohydride to hydrogen and hypoborate BO ...
Stoichiometric reducing agents to accomplish this task include lithium aluminium hydride, sodium borohydride, alkoxy borohydrides, alkoxy aluminium hydrides, and boranes. Although stoichiometric chiral reducing agents often afford products with high enantioselectivity, the necessity of a stoichiometric amount of chiral material is a disadvantage.
Organoboron. Organoboron chemistry or organoborane chemistry studies organoboron compounds, also called organoboranes.These chemical compounds combine boron and carbon; typically, they are organic derivatives of borane (BH 3), as in the trialkyl boranes.
The Meyers synthesis is an organic synthesis for the preparation of unsymmetrical aldehydes via hydrolysis of an ... is reduced with sodium borohydride and the ...
Trimethyl borate is the main precursor to sodium borohydride by its reaction with sodium hydride in the Brown-Schlesinger process: 4 NaH + B(OCH 3) 3 → NaBH 4 + 3 NaOCH 3. It is a gaseous anti-oxidant in brazing and solder flux. Otherwise, trimethyl borate has no announced commercial applications.