Lithium nitride, preparation

Uses. The largest use of lithium metal is in the production of organometaUic alkyl and aryl lithium compounds by reactions of lithium dispersions with the corresponding organohaHdes. Lithium metal is also used in organic syntheses for preparations of alkoxides and organosilanes, as weU as for reductions. Other uses for the metal include fabricated lithium battery components and manufacture of lithium alloys. It is also used for production of lithium hydride and lithium nitride. 

Lithium Amide. Lithium amide [7782-89-0], LiNH2, is produced from the reaction of anhydrous ammonia and lithium hydride. The compound can also be prepared by the removal of ammonia from solutions of lithium metal in the presence of catalysts (54). Lithium amide starts to decompose at 320°C and melts at 375°C. Decomposition of the amide above 400°C results first in lithium imide, Li2NH, and eventually in lithium nitride, Li N. Lithium amide is used in the production of antioxidants (qv) and antihistamines (see HiSTAMlNE AND HISTAMINE ANTAGONISTS). 

Lithium Nitride. Lithium nitride [26134-62-3], Li N, is prepared from the strongly exothermic direct reaction of lithium and nitrogen. The reaction proceeds to completion even when the temperature is kept below the melting point of lithium metal. The lithium ion is extremely mobile in the hexagonal lattice resulting in one of the highest known soHd ionic conductivities. Lithium nitride in combination with other compounds is used as a catalyst for the conversion of hexagonal boron nitride to the cubic form. The properties of lithium nitride have been extensively reviewed (66). 

Li + N2 2 Li3 N What mass of the product, lithium nitride, can be prepared from 4.5 g of lithium metal and 9.5 g of molecular nitrogen ... 

Lithium nitride is used as a catalyst to prepare boron nitride. It also is used as a reducing and nucleophilic reagent in organic synthesis, and to convert metals into their nitrides. 

Lithium nitride is prepared by passing dry nitrogen gas over lithium metal 6Li -I- N2 —> 2Li3N... 

Preparation of Lithium Nitride by Reacting Lithium with Nitrogen. Assemble an apparatus as shown in Fig. 83. Insert an iron tube into quartz tube 9. Using pincers, extract a small piece of metallic lithium from the kerosene in which it is stored (wear eye protection ), put it in a mortar, and carefully remove the solid crust covering the surface of the metal from all its sides with a thin knife. Lower the cleaned piece of lithium for two or three seconds into a beaker with methanol (why ) and put it into an iron boat. Put the latter into the iron tube. 

Two other nitrides of iron have been prepared,2 namely, ferrous nitride, Fe3N2, and ferric nitride, FeN. The former is described as a black, oxidisable powder, obtained by heating lithium nitride with ferrous potassium chloride. The ferric nitride, FeN, resulted when lithium nitride was heated with ferric potassium chloride. It is a black substance, which, on being heated in air, oxidises to ferric oxide. These substances are, presumably, ferrous and ferric substituted ammonias, the constitutional formulae being —... 

As shown in Reaction (21), in the liquid-solid reaction of CrCla and LisN, nanocrystalline CrN with average particle size of about 25 run was prepared via a benzene-thermal method in the temperature range 350-420 °C [70]. By using lithium nitride (LisN) instead of explosive NaNa, ultrafine cubic ZrN powders of size about 180 run were prepared in benzene [71]. 

Lithium nitride, LisN. Mol. wt. 34.83. Preparation. Supplier Foote Mineral Co. 

El 5.3 (a) Hydrolysis of LijN. Lithium nitride can be prepared directly from the elements. Since it contains ions,... 

Red lithium nitride, I i, N. can be prepared from the elements at 400 C and has a unique structure [29], Li atoms link into six-membered rings in a planar fashion, as is in graphite and BN. The six-membered rings are centered by N atoms and the sheets are linked by Li atoms. Nitrogen is. therefore. 8-coordinated in a hexagonal bipyramidal arrangement as shown in Fig. 2. 

By far the largest class of ternary lithium nitrides are those with the antifluorite structure, prepared largely by Juza, and reviewed by him [42], The ternaries are more thermally stable than the binaries which would seem to indicate a relaxation of the internal strain (both cation- cation and anion-anion repulsions) of binary nitrides. Many of these compounds are in fact ordered superstructures of antifluorite and it is remarkable that most of the transition metals are observed in high oxidation states--much higher than those in the binaries (e.g. Li7Mn + N4 vs Mn5 + N2). They are Li+ conductors at elevated... 

Lithium nitride, an ionic compound containing the Li and ions, is prepared by the reaction of lithium metal and nitrogen gas. Calculate the mass of lithium nitride formed from 56.0 g of nitrogen gas and 56.0 g of lithium in the unbalanced reaction ... 

Fig. 272. Preparation of lithium nitride ) crucible made of ZrOg coated with LiF e) iron protective crucible r) ceramic outer tube glass adapter with a glass peephole / and stopcock h.

Transition-metal nitrides where nitrogen is present as an interstitial are prepared by the reaction of the metals with NH3 around 1470 K. BN is obtained by heating boron with NH3 at white heat. Metal nitrides are also prepared by the reaction of metal chlorides with NHj. For example, MN and WN films are prepared by the reaction of NH3 with AICI3 and WCl respectively. Recently, nitrides of Ti, Zr, Hf and lanthanides have been prepared by the reaction of lithium nitride with the anhydrous metal chlorides [8] ... 

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