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Beryllium nitrate

Summary

Beryllium nitrate is an inorganic compound with the idealized chemical formula Be(NO3)2. The formula suggests a salt, but, as for many beryllium compounds, the compound is highly covalent. Little of its chemistry is well known. "When added to water, brown fumes are evolved; when hydrolyzed in sodium hydroxide solution, both nitrate and nitrite ions are produced."[2]

Beryllium nitrate
Names
Systematic IUPAC name
Beryllium nitrate
Other names
Beryllium dinitrate
Identifiers
  • 13597-99-4 checkY
  • 7787-55-5 (trihydrate) checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 24337 checkY
ECHA InfoCard 100.033.678 Edit this at Wikidata
EC Number
  • 237-062-5
  • 26126
UNII
  • 3VT1AXZ5LO checkY
  • 1C20531KRZ (trihydrate) checkY
UN number 2464
  • DTXSID6065555 Edit this at Wikidata
  • InChI=1S/Be.2NO3/c;2*2-1(3)4/q+2;2*-1 checkY
    Key: RFVVBBUVWAIIBT-UHFFFAOYSA-N checkY
  • [Be+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O
Properties
Be(NO3)2
Molar mass 133.021982 g/mol
Appearance white solid
Odor odorless
Density 1.56 g/cm3
Melting point 60.5 °C (140.9 °F; 333.6 K)
Boiling point 142 °C (288 °F; 415 K) (decomposes)
166 g/100 mL
Thermochemistry
-700.4 kJ/mol
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.002 mg/m3
C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)[1]
REL (Recommended)
 Ca C 0.0005 mg/m3 (as Be)[1]
IDLH (Immediate danger)
 Ca [4 mg/m3 (as Be)][1]
Related compounds
Other cations
 Magnesium nitrate
Calcium nitrate
Strontium nitrate
Barium nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Structure of basic berylliium nitrate.[3] Color scheme: red = O, blue = N, turquoise = Be.

Synthesis and reactions edit

The straw-colored adduct Be(NO3)2(N2O4) forms upon treatment of beryllium chloride with dinitrogen tetroxide:

BeCl2 + 3 N2O4 → Be(NO3)2(N2O4) + 2 NOCl

Upon heating, this adduct loses N2O4 and produces colorless Be(NO3)2. Further heating of Be(NO3)2 induces conversion to basic beryllium nitrate, which adopts a structure akin to that for basic berylium acetate.[4]

Unlike the basic acetate, with its six lipophilic methyl groups, the basic nitrate is insoluble in most solvents.

References edit

  1. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ Addison, C.C.; Logan, N. (1964). Anhydrous Metal Nitrates. Advances in Inorganic Chemistry and Radiochemistry. Vol. 6. pp. 71–142. doi:10.1016/S0065-2792(08)60225-3. ISBN 9780120236060.
  3. ^ Haley, M. J.; Wallwork, S. C.; Duffin, B.; Logan, N.; Addison, C. C. (1997). "Hexa-μ-nitrato-μ4-oxo-tetraberyllium". Acta Crystallographica Section C Crystal Structure Communications. 53 (7): 829–830. doi:10.1107/S010827019700303X.
  4. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 122. ISBN 978-0-08-037941-8.