Germanium diselenide

Germanium diselenide is an inorganic compound, with the chemical formula of GeSe₂.

Germanium diselenide

Names
Other names Germanium selenide Germanium(IV) selenide
Identifiers
CAS Number	12065-11-1 Y
3D model (JSmol)	Interactive image
ChemSpider	74804
ECHA InfoCard	100.031.863
EC Number	235-063-5
PubChem CID	82903
CompTox Dashboard (EPA)	DTXSID9065237
InChI InChI=1S/GeSe2/c2-1-3 Key: WYDSCDJEAVCHQJ-UHFFFAOYSA-N
SMILES [Ge](=[Se])=[Se]
Properties
Chemical formula	GeSe2
Molar mass	230.572 g·mol−1
Appearance	yellow crystals
Density	4.56±0.02 g·cm−3[1]
Melting point	707±3 °C[1]
Related compounds
Other anions	Germanium dioxide Germanium disulfide Germanium ditelluride
Other cations	Carbon diselenide Silicon diselenide Tin diselenide Lead diselenide
Related compounds	Germanium monoselenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Germanium diselenide is prepared by reacting stoichiometric amounts of germanium and selenium or by reacting germanium tetrachloride with hydrogen selenide:^[1]

Ge + 2Se → GeSe₂

GeCl₄ + 2H₂Se → GeSe₂ + 4HCl

Properties

Germanium diselenide reacts with selenium and hydrazine to obtained yellow (N₂H₅)₄Ge₂Se₆, a selenidogermanate.^[2]

2GeSe₂ + 2Se + 5N₂H₄ → (N₂H₅)₄Ge₂Se₆ + N₂

It reacts with lead selenide and gallium(III) selenide at high temperatures to obtain PbGa₂GeSe₆.^[3]

References

1. Ivanov-Emin, B. N. Germanium selenides. Zhurnal Obshchei Khimii, 1940. 10: 1813-1818. ISSN: 0044-460X.
2. David B. Mitzi (May 2005). "Synthesis, Structure, and Thermal Properties of Soluble Hydrazinium Germanium(IV) and Tin(IV) Selenide Salts". Inorganic Chemistry. 44 (10): 3755–3761. doi:10.1021/ic048276l. ISSN 0020-1669. PMID 15877460. Retrieved 2021-01-23.
3. Valeriy V. Badikov, Dmitrii V. Badikov, Li Wang, Galina S. Shevyrdyaeva, Vladimir L. Panyutin, Anna A. Fintisova, Svetlana G. Sheina, Valentin Petrov (2019-08-07). "Crystal Growth and Characterization of a New Quaternary Chalcogenide Nonlinear Crystal for the Mid-Infrared: PbGa 2 GeSe 6". Crystal Growth & Design. 19 (8): 4224–4228. doi:10.1021/acs.cgd.9b00118. ISSN 1528-7483. S2CID 198354895. Archived from the original on 2021-07-26. Retrieved 2021-01-23.{{cite journal}}: CS1 maint: multiple names: authors list (link)