Beryllium borohydride

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Beryllium borohydride
Identifiers
CAS number 17440-85-6
PubChem 6101896
Jmol-3D images Image 1
Properties
Molecular formula Be(BH4)2
Molar mass 38.70 g/mol
Appearance white crystals
Density 0.604 g/cm3
Melting point 91.3 °C (196.3 °F; 364.4 K)
Boiling point 123 °C (253 °F; 396 K) decomp
Solubility in water reacts
Solubility soluble in benzene, diethyl ether
Structure
Crystal structure tetragonal
Thermochemistry
Std enthalpy of
formation
ΔfHo298
-108 kJ/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Beryllium borohydride is an inorganic compound with the chemical formula Be(BH4)2.

Structure[edit]

The crystal structure is made up of a helical polymer of BH4Be and BH4 structure units.[1]

Production[edit]

Beryllium borohydride is formed by the reaction of beryllium hydride with diborane in an ether solution.

Application[edit]

The purest beryllium hydride is obtained by the reaction of triphenylphosphine, PPh3, with beryllium borohydride, Be(BH4)2:[2]

Be(BH4)2 + 2PPh3 → 2Ph3PBH3 + BeH2

References[edit]

  1. ^ Marynick, Dennis S.; Lipscomb, William N. (1 April 1972). "Crystal structure of beryllium borohydride". Inorganic Chemistry 11 (4): 820–823. doi:10.1021/ic50110a033. 
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0080379419.