Sodium hypophosphate

Although catalytic hydrogenation is the method most often used, double bonds can be reduced by other reagents, as well. Among these are sodium in ethanol, sodium and rerr-butyl alcohol in HMPA, lithium and aliphatic amines (see also 15-14), " zinc and acids, sodium hypophosphate and Pd-C, (EtO)3SiH—Pd(OAc)2, trifluoroacetic acid and triethylsilane (EtsSiH), and hydroxylamine and ethyl acetate.However, metallic hydrides, such as lithium aluminum hydride and sodium borohydride, do not in general reduce carbon-carbon double bonds, although this can be done in special cases where the double bond is polar, as in 1,1-diarylethenes and in enamines. " °... 

LiAIH(OEt)3,345 DIBALH,346 and NaAIH4.347 The metal hydride method is useful for aliphatic and aromatic nitriles. Reduction to the aldehyde has also been accomplished by treatment of the nitrile with sodium hypophosphate and Raney nickel in aqueous acetic acid-pyridine or formic acid,348 and with zinc and a Cob(I)alamin catalyst in aqueous acetic... 

There are recorded the following sodium hypophosphates Na POr (or Na-iPiOs). NaHPOv (or Na H P 6 l. NajHlPO,), (or NatHPjO,). and (NaHiPOil (or NuHjPjOi,). There is evidence in support of each of the formulas H-POs, HjP Og for hypophosphoric acid. 

Sodium hypophosphate, Na2H2P2-08-6H20, 4 68 Sodium imidodiphosphate, Na4P208(NH), 6 101 Sodium iodate, 1 168... 

Silver hypophosphate, Ag4P206.—Silver nitrate gives with sodium hypophosphate, Na4P206, a white precipitate of silver hypophosphate. It is also produced in crystalline form by boiling a solution of silver nitrate in nitric acid with phosphorus. Heat decomposes it into silver metaphosphate and metallic silver 3... 

CALCIUM NITRATE (10124-37-5) A strong oxidizer. Violent reaction with reducing materials. Forms shock-sensitive mixtures with organic contaminants. Incompatible with combustible materials (wood, cloth, oil, grease, etc.), organics, and other easily oxidizable materials, chemically active metals, aluminum nitrate, ammonium nitrate, cyanides, esters, phosphorus, sodium hypophosphate, thyocyanates. Con osive to many substances, including aluminum. 

On standing in air, hypophosphates tend to oxidise to pyrophosphates. In sodium bicarbonate solution, sodium hypophosphate is quantitatively oxidised by bromine to sodium pyrophosphate. If pure hypophosphoric acid is allowed to stand in the anhydrous state, it is first converted to isohypo-phosphoric acid and therefrom to mixture of pyrophosphorous and pyrophosphoric acids. In the... 

If aqueous solutions of sodium pyrophosphite and sodium hypophosphate are boiled, the sodium salt of 3/P-0-4/P-4/P acid (5.252) can be obtained. The acid 4/P-3/P-4/P (5.253a) is formed in low yield by oxidation of (5.251a) in KHCO3 solution with iodine. 

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