Beryllium borohydride
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| General | ||||||||||
| Surname | Beryllium borohydride | |||||||||
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| Molecular formula | Be [BH 4 ] 2 | |||||||||
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| properties | ||||||||||
| Molar mass | 36.68 g mol −1 | |||||||||
| Physical state |
firmly |
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| Melting point |
91.3 ° C (sublimed) |
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| solubility |
reacts violently with water and hydrochloric acid |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||
Beryllium borohydride is a chemical compound of beryllium from the group of borohydrides .
Extraction and presentation
Beryllium borohydride can be obtained by reacting beryllium chloride with lithium borohydride . The compound was first synthesized in 1940 by Burg and Schlesinger. It can also be obtained by reacting diborane with dimethylberyllium .
properties
Beryllium borohydride is a solid that reacts violently with water. It sublimes at 91.3 ° C and decomposes at temperatures above 123 ° C. It has a tetragonal crystal structure with the space group I 4 1 cd (space group no. 110) . The polymer structure consists of BH 4 Be and BH 4 units.
use
The etherate complex of beryllium borohydride (Be [BH 4 ] 2 · (C 2 H 5 ) 2 O) can be used for the production of beryllium hydride .
![{\ displaystyle \ mathrm {Be [BH_ {4}] _ {2} \ cdot (C_ {2} H_ {5}) _ {2} O + \ 2 \ (C_ {6} H_ {5}) _ {3 } P \ rightarrow BeH_ {2} + \ 2 \ (C_ {6} H_ {5}) _ {3} P \ cdot BH_ {3} + (C_ {2} H_ {5}) _ {2} O} }](https://wikimedia.org/api/rest_v1/media/math/render/svg/f55e5c5394368cb6e7ff8e592535ba87e0ed402e)
Individual evidence
- ↑ a b c d e Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 1995, ISBN 0-8493-8671-3 , pp. 20 ( limited preview in Google Book search).
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ↑ a b Dennis S. Marynick, William N. Lipscomb: Crystal structure of beryllium borohydride. In: Inorganic Chemistry. 11, 1972, p. 820, doi: 10.1021 / ic50110a033 .
- ↑ Hans Zimmer: Annual Reports in Inorganic and General Syntheses-1976 . Elsevier, 2016, ISBN 978-1-4832-8159-9 , pp. 2 ( limited preview in Google Book search).