[4] Sodium borohydride can also be produced by the action of NaH on powdered borosilicate glass. • NaBH4 + CH2O + H2O = CH4O + NaOH + BH3 PubChem Substance ID 24868683 Sodium Borohydride NaBH4 Molar Mass, Molecular Weight. Chemical name: Sodium Borohydride. Most typically, it is used in the laboratory for converting ketones and aldehydes to alcohols. Sodium Borohydride - NaBH 4 NaBH4 Sodium Tetrahydridoborate(1-) Sodium Tetrahydroborate(1-) Sodium Tetrahydroborate Molar Mass of BH4Na Oxidation State of BH4Na It was suggested that the simultaneous activation of the carbonyl compound and borohydride occurs, via interaction with the alcohol and alkoxide ion, respectively, and that the reaction proceeds through an open transition state. But, it is a mild reducing agent which cannot reduce esters, amides and carboxylic acids. What is this equivalent to in mmHg, atm and kPa? Sodium borohydride has been considered as a solid state hydrogen storage candidate. This is the main difference between LiAlH4 and NaBH4. Density: 1.07 g/cm3. In the Brown-Schlesinger process Sodium borohydride is industrially prepared from sodium hydride (produced by reacting Na and H2) and trimethyl borate at 250–270 °C: Millions of kilograms are produced annually, far exceeding the production levels of any other hydride reducing agent. The solid is known to exist as three polymorphs: α, β and γ. Its molar mass is 37.83 g/mol. (1960) "Alkali metal borohydrides" (Bayer). [7][8] Results of this wartime research were declassified and published in 1953. MDL number MFCD00003518. [26] Mixing water or an alcohol with the borohydride converts some of it into unstable hydride ester, which is more efficient at reduction, but the reductant eventually decomposes spontaneously to produce hydrogen gas and borates. Sodium borohydride is an odorless white to gray-white microcrystalline powder that often forms lumps. It reduces esters slowly and inefficiently with excess reagent and/or elevated temperatures, while carboxylic acids and amides are not reduced at all. NaBH4 reduces many organic carbonyls, depending on the precise conditions. The same reaction can also occur intramolecularly: an α-ketoester converts into a diol, since the alcohol produced attacks the borohydride to produce an ester of the borohydride, which then reduces the neighboring ester. EC Number 241-004-4. [27] The combination of NaBH4 with carboxylic acids results in the formation of acyloxyborohydride species, such as STAB. German patent DE 1088930 19600915 (ChemAbs: 55:120851). If the mass of one mole of hydrogen is 1.01 grams; phosphorus, 30.97 grams; and oxygen, 16.0 grams, what What is the molar mass of chromium? Materials & Energy Research Institute Tokyo, Ltd. Chemo- and stereoselectivity using Borohydride reagents, https://en.wikipedia.org/w/index.php?title=Sodium_borohydride&oldid=982636322, Chemical articles with multiple compound IDs, Multiple chemicals in an infobox that need indexing, Chemical articles with multiple CAS registry numbers, Chemical articles with multiple PubChem CIDs, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 October 2020, at 11:19.


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