Lithium amide

Lithium amide

__ Li+
      __ N3−
      __ H+
Names
IUPAC name
Lithium amide
Other names
Lithium azanide
Lithamide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.062 Edit this at Wikidata
UNII
  • InChI=1S/Li.H2N/h;1H2/q+1;-1 checkY
    Key: AFRJJFRNGGLMDW-UHFFFAOYSA-N checkY
  • InChI=1/Li.H2N/h;1H2/q+1;-1
    Key: AFRJJFRNGGLMDW-UHFFFAOYAO
  • [Li+].[NH2-]
Properties
LiNH2
Molar mass 22.96 g·mol−1
Appearance white solid
Density 1.178 g/cm3
Melting point 375 °C (707 °F; 648 K)
Boiling point 430 °C (806 °F; 703 K) decomposes
reacts
Solubility slightly soluble in ethanol
insoluble in ammonia
Thermochemistry
-182 kJ/mol
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
3
1
2
W
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Lithium amide or lithium azanide is an inorganic compound with the chemical formula LiNH2. It is a white solid with a tetragonal crystal structure.[1] Lithium amide can be made by treating lithium metal with liquid ammonia:[2]

2 Li + 2 NH3 → 2 LiNH2 + H2

Lithium amide decomposes into ammonia and lithium imide upon heating.[3]

  1. ^ David, William I. F.; Jones, Martin O.; Gregory, Duncan H.; Jewell, Catherine M.; Johnson, Simon R.; Walton, Allan; Edwards, Peter P. (2007-02-01). "A Mechanism for Non-stoichiometry in the Lithium Amide/Lithium Imide Hydrogen Storage Reaction". Journal of the American Chemical Society. 129 (6): 1594–1601. doi:10.1021/ja066016s. ISSN 0002-7863. PMID 17243680.
  2. ^ P. W. Schenk (1963). "Lithium amide". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 1. NY, NY: Academic Press. p. 454.
  3. ^ Pinkerton, F. E. (2005-09-01). "Decomposition kinetics of lithium amide for hydrogen storage materials". Journal of Alloys and Compounds. 400 (1): 76–82. doi:10.1016/j.jallcom.2005.01.059. ISSN 0925-8388.