Difference between revisions of "Calcium hydride"

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{{chembox
 
{{chembox
 
| Name = Calcium hydride
 
| Name = Calcium hydride
 +
| IUPACName = Calcium hydride
 
| Section1 = {{Chembox Identifiers
 
| Section1 = {{Chembox Identifiers
 
|  ChemSpiderID = 94784
 
|  ChemSpiderID = 94784
 
|  InChI = 1/Ca.2H/q+2;2*-1
 
|  InChI = 1/Ca.2H/q+2;2*-1
 
|  InChIKey = UUGAXJGDKREHIO-UHFFFAOYAG
 
|  InChIKey = UUGAXJGDKREHIO-UHFFFAOYAG
 +
|  StdInChI=1S/Ca.2H/q+2;2*-1
 +
|  StdInChIKey = FAQLAUHZSGTTLN-UHFFFAOYSA-N
 
|  CASNo = 7789-78-8
 
|  CASNo = 7789-78-8
 
|    CASNo_Ref = {{cascite}}
 
|    CASNo_Ref = {{cascite}}
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   }}
 
   }}
 
| Section2 = {{Chembox Properties
 
| Section2 = {{Chembox Properties
 +
|  Reference = <ref>{{RubberBible62nd|page=B-87}}.</ref>
 
|  Formula = CaH<sub>2</sub>
 
|  Formula = CaH<sub>2</sub>
 
|  MolarMass = 42.094 g mol<sup>–1</sup>
 
|  MolarMass = 42.094 g mol<sup>–1</sup>
 
|  Appearance = grey powder (white when pure)
 
|  Appearance = grey powder (white when pure)
|  Density = 1.70 g cm<sup>–3</sup>
+
|  Density = 1.9 g cm<sup>–3</sup>
 
|  Solubility = reacts
 
|  Solubility = reacts
|  MeltingPt = 816 °C
+
|  MeltingPt = 816 °C (under H<sub>2</sub>)
 
   }}
 
   }}
 
| Section3 = {{Chembox Structure
 
| Section3 = {{Chembox Structure
|  CrystalStruct = [[Orthorhombic]], [[Pearson symbol|oP12]]
+
|  Reference = <ref>{{Greenwood&Earnshaw1st|page=72}}.</ref><ref>{{Wells5th}}.</ref>
 +
|  CrystalStruct = [[Lead chloride structure|PbCl<sub>2</sub>]], [[Pearson symbol|oP12]]
 
|  SpaceGroup = P''nma'' (No. 62)
 
|  SpaceGroup = P''nma'' (No. 62)
}}
+
|  Coordination = Tricapped trigonal prismatic (Ca<sup>2+</sup>)
 +
  }}
 
| Section7 = {{Chembox Hazards
 
| Section7 = {{Chembox Hazards
 
|  Reference = <ref>{{CLP Regulation|index=001-002-00-4|page=340}}</ref>
 
|  Reference = <ref>{{CLP Regulation|index=001-002-00-4|page=340}}</ref>
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|  GHSSignalWord = DANGER
 
|  GHSSignalWord = DANGER
 
|  HPhrases = {{H-phrases|260}}
 
|  HPhrases = {{H-phrases|260}}
}}
+
  }}
 
| Section8 = {{Chembox Related
 
| Section8 = {{Chembox Related
 
|  OtherCations = [[Beryllium hydride]]<br/>[[Magnesium hydride]]<br/>[[Strontium hydride]]<br/>[[Barium hydride]]
 
|  OtherCations = [[Beryllium hydride]]<br/>[[Magnesium hydride]]<br/>[[Strontium hydride]]<br/>[[Barium hydride]]
}}}}
+
  }}
 +
}}
 
'''Calcium hydride''', CaH<sub>2</sub>, is an [[Ionic compound|ionic]] (or "saline") [[hydride]]. It is used as a [[drying agent]], particularly for [[organic solvent]]s
 
'''Calcium hydride''', CaH<sub>2</sub>, is an [[Ionic compound|ionic]] (or "saline") [[hydride]]. It is used as a [[drying agent]], particularly for [[organic solvent]]s
  
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==External links==
 
==External links==
 
{{wikipedia|Calcium hydride}}
 
{{wikipedia|Calcium hydride}}
*[http://www.orgsyn.org/orgsyn/chemname.asp?nameID=39312 Calcium hydride in ''Organic Syntheses'']
+
*{{OrgSynth preps|id=39312|name=calcium hydride}}
  
 
[[Category:Calcium compounds]]
 
[[Category:Calcium compounds]]
[[Category:Hydrides]]
+
[[Category:Metal hydrides]]
 
[[Category:Drying agents]]
 
[[Category:Drying agents]]
  
 
{{CC-BY-3.0}}
 
{{CC-BY-3.0}}

Latest revision as of 12:39, 20 June 2010

Calcium hydride
IUPAC name Calcium hydride
Identifiers
InChI InChI=1/Ca.2H/q+2;2*-1
InChIKey UUGAXJGDKREHIO-UHFFFAOYAG
Standard InChI InChI=1S/Ca.2H/q+2;2*-1
Standard InChIKey FAQLAUHZSGTTLN-UHFFFAOYSA-N
CAS number [7789-78-8]
EC number 232-189-2
ChemSpider 94784
Properties[1]
Chemical formula CaH2
Molar mass 42.094 g mol–1
Appearance grey powder (white when pure)
Density 1.9 g cm–3
Melting point

816 °C (under H2)

Solubility in water reacts
Structure[2][3]
Crystal structure PbCl2, oP12
Space group Pnma (No. 62)
Coordination geometry Tricapped trigonal prismatic (Ca2+)
Hazards[4]
EU index number 001-004-00-5
GHS pictograms Water-react. 1
GHS signal word DANGER
GHS hazard statements H260
Related compounds
Other cations Beryllium hydride
Magnesium hydride
Strontium hydride
Barium hydride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Calcium hydride, CaH2, is an ionic (or "saline") hydride. It is used as a drying agent, particularly for organic solvents

References

  1. CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p B-87. ISBN 0-8493-0462-8.
  2. Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; p 72. ISBN 0-08-022057-6.
  3. Wells, A. F. Structural Inorganic Chemistry, 5th ed.; Clarendon Press: Oxford, 1984. ISBN 0-19-855370-6.
  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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