Tetraethyl germanium

Structural formula
General
Surname	Tetraethyl germanium
other names	Tetraethylgerman
Molecular formula	C 8 H 20 Ge
Brief description	colorless liquid
External identifiers / databases
EC number	209-905-7
ECHA InfoCard	100.009.006
PubChem	11703
Wikidata	Q2277172
properties
Molar mass	188.88 g mol −1
Physical state	liquid
density	0.998 g cm −3 (25 ° C)
Melting point	−90 ° C
boiling point	163-164 ° C
solubility	practically insoluble in water
Refractive index	1.442 (20 ° C)
safety instructions
H and P phrases	H: 226-302-315-319-335
	P: 261-305 + 351 + 338
Toxicological data	700 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Tetraethylgermanium is a chemical compound from the group of organic germanium compounds and has the constitutional formula Ge (C ₂ H ₅ ) ₄ .

Extraction and presentation

The first synthesis of tetraethylgermanium by reacting diethylzinc with germanium tetrachloride was reported by Louis Munroe Dennis in 1925 .

{\ displaystyle \ mathrm {GeCl_ {4} +2 \ Zn (C_ {2} H_ {5}) _ {2} \ longrightarrow Ge (C_ {2} H_ {5}) _ {4} +2 \ ZnCl_ { 2}}}

properties

Tetraethylgermanium is a flammable, colorless, oily liquid with an odor reminiscent of light paraffinic hydrocarbons . It dissolves poorly in water but readily and without decomposition in various organic solvents.

use

Tetraethylgermanium is used to manufacture thin films in the semiconductor industry. Diethylgermanium dichloride can be obtained by reaction with germanium (IV) chloride .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Datasheet Tetraethylgermanium, 99% from Sigma-Aldrich , accessed on July 18, 2014 ( PDF ).
↑ American Elements: Tetraethylgermanium
↑ Datasheet Tetraethylgermanium, 99% from AlfaAesar, accessed on July 18, 2014 ( PDF )(JavaScript required) .
↑ ^a ^b L. M. Dennis: Germanium. Summary of studies in the Department of Chemistry, Cornell University, 1921-1927 . In: Journal of Inorganic and General Chemistry . tape 174 , no. 1 , August 2, 1928, p. 97 , doi : 10.1002 / zaac.19281740114 .
↑ M. Gazicki, G. Janowska: Thermal stability of semiconducting thin germanium / carbon alloy films produced from tetraethyl in discharge of RF glow. In: Thin Solid Films. 352, 1999, pp. 6-8, doi: 10.1016 / S0040-6090 (99) 00374-0 .
↑ Jane E. Macintyre: Dictionary of Organometallic Compounds . CRC Press, 1994, ISBN 978-0-412-43060-2 , pp. 1715 ( limited preview in Google Book search).

[Sigma-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Datasheet Tetraethylgermanium, 99% from Sigma-Aldrich , accessed on July 18, 2014 ( PDF ).

[Am-2] American Elements: Tetraethylgermanium

[Alfa-3] Datasheet Tetraethylgermanium, 99% from AlfaAesar, accessed on July 18, 2014 ( PDF )(JavaScript required) .

[DOI10.1002/zaac.19281740114-4] L. M. Dennis: Germanium. Summary of studies in the Department of Chemistry, Cornell University, 1921-1927 . In: Journal of Inorganic and General Chemistry . tape 174 , no. 1 , August 2, 1928, p. 97 , doi : 10.1002 / zaac.19281740114 .

[DOI10.1016/S0040-6090(99)00374-0-5] M. Gazicki, G. Janowska: Thermal stability of semiconducting thin germanium / carbon alloy films produced from tetraethyl in discharge of RF glow. In: Thin Solid Films. 352, 1999, pp. 6-8, doi: 10.1016 / S0040-6090 (99) 00374-0 .

[6] Jane E. Macintyre: Dictionary of Organometallic Compounds . CRC Press, 1994, ISBN 978-0-412-43060-2 , pp. 1715 ( limited preview in Google Book search).