Digerman

Structural formula
General
Surname	Digerman
Molecular formula	Ge 2 H 6
Brief description	colorless liquid
External identifiers / databases
EC number	630-780-3
ECHA InfoCard	100.159.079
PubChem	6394763
Wikidata	Q5275604
properties
Molar mass	151.33 g mol −1
Physical state	liquid
density	1.98 g cm −3 (−109 ° C)
Melting point	−109 ° C
boiling point	31.5 ° C
Vapor pressure	503.5 Torr (18.8 ° C)
safety instructions
H and P phrases	H: 280-302-312-315-319-332-335
	P: 261-280-305 + 351 + 338-410 + 403
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Digermane is a chemical compound from the group of germane .

Extraction and presentation

Digerman can be obtained by passing Monogerman through a silent electrical discharge, with Digerman and Trigerman as main products and alongside higher Germans up to Nonagerman . Other processes for the production of Monogerman also produce higher Germans , such as the acid decomposition of magnesium germanide with ammonium bromide .

properties

Digerman is a colorless liquid that boils at 31 ° C. According to Antoine, the vapor pressure function results from log ₁₀ (P) = A− (B / (T + C)) (P in bar, T in K) with A = 3.95946, B = 1129.447 and C = −19.239 in the temperature range from 184.5 to 304.7 K. The enthalpy of vaporization at the boiling point is 26.8 kJ · mol ⁻¹ . The compound decomposes when heated at temperatures above 200 ° C.

use

Digerman is used for the deposition of amorphous germanium and epitaxial thin films . It is also used in the formation of boron- doped silicon- germanium alloy layers and with diborane in the formation of boron-doped germanium films using epitaxial processes.

Individual evidence

↑ ^a ^b ^c Dennis, LM; Corey, RB; Moore, RW: Germanium VII: The Hydrides of Germanium in J. Am. Chem. Soc. 46 (1924) 657-674, doi : 10.1021 / ja01668a015 .
↑ ^a ^b ^c ^d ^e data sheet Digerman, 9-11% (balance is hydrogen), 99.99% (excluding germane and trigermane), 10% in hydrogen, electronic grade at Sigma-Aldrich , accessed on January 16, 2014 ( PDF ).
↑ ^a ^b Emeleus, HJ; Gardner, ER: in J. Chem. Soc. 1938, 1900-1909.
↑ ^a ^b Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 716.
^ Stull, DR: Vapor Pressure of Pure Substances. Organic and Inorganic Compounds in Ind. Eng. Chem. 39 (1947) 517-540, doi : 10.1021 / ie50448a022 .
↑ Emeleus, HJ; Jellinek, HHG: in Trans. Faraday Soc. 40 (1944) 93-99.

[Dennis-1] Dennis, LM; Corey, RB; Moore, RW: Germanium VII: The Hydrides of Germanium in J. Am. Chem. Soc. 46 (1924) 657-674, doi : 10.1021 / ja01668a015 .

[Sigma-2] ↑ ^a ^b ^c ^d ^e data sheet Digerman, 9-11% (balance is hydrogen), 99.99% (excluding germane and trigermane), 10% in hydrogen, electronic grade at Sigma-Aldrich , accessed on January 16, 2014 ( PDF ).

[Emeleus-3] Emeleus, HJ; Gardner, ER: in J. Chem. Soc. 1938, 1900-1909.

[brauer-4] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 716.

[5] Stull, DR: Vapor Pressure of Pure Substances. Organic and Inorganic Compounds in Ind. Eng. Chem. 39 (1947) 517-540, doi : 10.1021 / ie50448a022 .

[Emeleus2-6] Emeleus, HJ; Jellinek, HHG: in Trans. Faraday Soc. 40 (1944) 93-99.