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Sodium hydride is the chemical compound with the empirical formula Na H. This alkali metal hydride is primarily used as a strong yet combustible base in organic synthesis . NaH is a saline (salt-like) hydride , composed of Na + and H − ions, in contrast to molecular hydrides such as borane , silane , germane , ammonia , and methane .
When sodium hydride is compressed with hydrogen, NaH 3 and NaH 7 form. These are formed at 30 GPa and 2,100 K. [2] Heating and compressing a metal with ammonia borane avoids using bulky hydrogen, and produces boron nitride as a decomposition product in addition to the polyhydride.
Decomposes at low pressure and room temperatures, [1] stable under N 2 or Ar in sealed contanier and decomposes slowly in contact with moist air and rapidly in contact with water. Above 215 °C under high vacuum it decomposes to form ketenes and carbanions [1] 268-270 °C (atmospehric pressure) NA 265-268 °C Soluble in water
The hydride adds to an electrophilic center, typically unsaturated carbon. Hydrides such as sodium hydride and potassium hydride are used as strong bases in organic synthesis. The hydride reacts with the weak Bronsted acid releasing H 2. Hydrides such as calcium hydride are used as desiccants, i.e. drying agents, to remove trace water from ...
Still other industrial routes to silane involve reduction of silicon tetrafluoride (SiF 4) with sodium hydride (NaH) or reduction of SiCl 4 with lithium aluminium hydride (LiAlH 4). Another commercial production of silane involves reduction of silicon dioxide (SiO 2) under Al and H 2 gas in a mixture of NaCl and aluminum chloride (AlCl 3) at ...
In general, complex metal hydrides have the formula M x M' y H n, where M is an alkali metal cation or cation complex and M' is a metal or metalloid.Well known examples feature group 13 elements, especially boron and aluminium including sodium aluminium hydride, NaAlH 4), lithium aluminium hydride, LiAlH 4, and lithium borohydride, (LiBH 4).
Binary hydrogen compounds in group 1 are the ionic hydrides (also called saline hydrides) wherein hydrogen is bound electrostatically. Because hydrogen is located somewhat centrally in an electronegative sense, it is necessary for the counterion to be exceptionally electropositive for the hydride to possibly be accurately described as truly behaving ionic.
Metal hydrides (sodium hydride, lithium aluminium hydride, uranium trihydride) Partially or fully alkylated derivatives of metal and nonmetal hydrides (diethylaluminium hydride, trimethylaluminium, triethylaluminium, butyllithium), with a few exceptions (i.e. dimethylmercury and tetraethyllead) Copper fuel cell catalysts (zinc oxide, aluminium ...