Difference between revisions of "Sodium hydride"

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'''Sodium hydride''', NaH, is an [[Ionic compound|ionic]] (or "saline") [[hydride]]. It is used as a strong [[reducing agent]] in [[organic synthesis]].
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{{chembox
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|  Name = Sodium hydride
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| Section1 = {{Chembox Identifiers
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|  CASNo = 7646-69-7
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|    CASNo_Ref = {{cascite}}
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|  EINECS = 231-587-3
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|  ChemSpiderID = 23144
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|  InChI=1/Na.H/q+1;-1
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|  InChIKey = BZKBCQXYZZXSCO-UHFFFAOYAY
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|  StdInChI = 1S/Na.H
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|  StdInChIKey = MPMYQQHEHYDOCL-UHFFFAOYSA-N
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  }}
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| Section2 = {{Chembox Properties
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|  Reference = <ref>{{RubberBible62nd|page=B-148}}.</ref>
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|  Formula = NaH
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|  MolarMass = 23.998 g mol<sup>–1</sup>
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|  Appearance = white to grey solid
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|  Density = 0.92 g cm<sup>–1</sup>
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|  Solubility = reacts
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|  MeltingPt = 800 °C ''decomp.''
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|  RefractIndex = 1.470
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  }}
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| Section3 = {{Chembox Structure
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|  Reference = <ref>{{Wells5th}}.</ref>
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|  CrystalStruct = [[Halite structure|Halite (NaCl)]], [[Pearson symbol|cF8]]
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|  SpaceGroup = Fm{{overline|3}}m, No. 225
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|  Coordination = Octahedral (Na<sup>+</sup>)<br/>Octahedral (H<sup>–</sup>)
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|  LattConst_a = 496 pm
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  }}
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| Section4 = {{Chembox Thermochemistry
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|  Reference = <ref name="NIST">{{NIST chemistry|id=1S/Na.H|name=Sodium hydride|accessdate=2010-06-20}}.</ref>
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|  DeltaHf = –56.44 kJ mol<sup>–1</sup>
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|  Entropy = 40.03 J K<sup>–1</sup> mol<sup>–1</sup>
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  }}
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| Section7 = {{Chembox Hazards
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|  Reference = <ref>{{CLP Regulation|index=001-002-00-4|page=340}}</ref>
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|  EUIndex = 001-003-00-X
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|  GHSPictograms = {{GHS02|Water-react. 1}}
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|  GHSSignalWord = DANGER
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|  HPhrases = {{H-phrases|260}}
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  }}
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| Section8 = {{Chembox Related
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|  OtherCations = [[Lithium hydride]]<br/>[[Potassium hydride]]<br/>[[Rubidium hydride]]<br/>[[Caesium hydride]]
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|  OtherCpds = [[Lithium aluminium hydride]]<br/>[[Sodium borohydride]]
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  }}
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}}
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'''Sodium hydride''', NaH, is an [[Ionic compound|ionic]] (or "saline") [[hydride]]. It is used as a strong [[reducing agent]] and/or a [[strong base]] in [[organic synthesis]].
  
 
==References==
 
==References==
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==External links==
 
==External links==
 
{{wikipedia|Sodium hydride}}
 
{{wikipedia|Sodium hydride}}
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*{{OrgSynth preps|id=36882|name=sodium hydride}}
  
 
[[Category:Sodium compounds]]
 
[[Category:Sodium compounds]]
[[Category:Hydrides]]
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[[Category:Metal hydrides]]
 
[[Category:Reagents for organic chemistry]]
 
[[Category:Reagents for organic chemistry]]
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[[Category:Drying agents]]
  
 
{{CC-BY-3.0}}
 
{{CC-BY-3.0}}

Latest revision as of 12:38, 20 June 2010

Sodium hydride
Identifiers
InChI InChI=1/Na.H/q+1;-1
InChIKey BZKBCQXYZZXSCO-UHFFFAOYAY
Standard InChI InChI=1S/Na.H
Standard InChIKey MPMYQQHEHYDOCL-UHFFFAOYSA-N
CAS number [7646-69-7]
EC number 231-587-3
ChemSpider 23144
Properties[1]
Chemical formula NaH
Molar mass 23.998 g mol–1
Appearance white to grey solid
Density 0.92 g cm–1
Melting point

800 °C decomp.

Solubility in water reacts
Refractive index (nD) 1.470
Structure[2]
Crystal structure Halite (NaCl), cF8
Space group Fm3m, No. 225
Lattice constant a = 496 pm
Coordination geometry Octahedral (Na+)
Octahedral (H)
Thermochemistry[3]
Std enthalpy of formation ΔfHo298 –56.44 kJ mol–1
Standard molar entropy So298 40.03 J K–1 mol–1
Hazards[4]
EU index number 001-003-00-X
GHS pictograms Water-react. 1
GHS signal word DANGER
GHS hazard statements H260
Related compounds
Other cations Lithium hydride
Potassium hydride
Rubidium hydride
Caesium hydride
Other compounds Lithium aluminium hydride
Sodium borohydride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Sodium hydride, NaH, is an ionic (or "saline") hydride. It is used as a strong reducing agent and/or a strong base in organic synthesis.

References

  1. CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p B-148. ISBN 0-8493-0462-8.
  2. Wells, A. F. Structural Inorganic Chemistry, 5th ed.; Clarendon Press: Oxford, 1984. ISBN 0-19-855370-6.
  3. Sodium hydride. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/Na.H>. (accessed 20 June 2010).
  4. Index no. 001-002-00-4 of Annex VI, Part 3, to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006. OJEU L353, 31.12.2008, pp 1–1355 at p 340.

External links

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