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Germanium monosulfide

Names
Systematic IUPAC name Germanium(II) sulfide
Identifiers
CAS Number	12025-32-0
3D model (JSmol)	Interactive image
ChemSpider	4897590
ECHA InfoCard	100.031.536
PubChem CID	6367215
CompTox Dashboard (EPA)	DTXSID20923282
InChI InChI=1S/GeS/c1-2Key: VDNSGQQAZRMTCI-UHFFFAOYSA-N
SMILES S=
Properties
Chemical formula	GeS
Molar mass	104.69 g·mol
Related compounds
Related compounds	Carbon monosulfide Germanium monoxide Germanium disulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Germanium monosulfide or Germanium(II) sulfide is the chemical compound with the formula GeS. It is a chalcogenide glass and a semiconductor. Germanium sulfide is described as a red-brown powder or black crystals. Germanium(II) sulfide when dry is stable in air, hydrolyzes slowly in moist air but rapidly reacts in water forming Ge(OH)₂ and then GeO. It is one of a few sulfides that can be sublimed under vacuum without decomposition.

Preparation

First made by Winkler by reducing GeS₂ with Ge. Other methods include reduction in a stream of H₂ gas, or with an excess of H₃PO₂ followed by vacuum sublimation.

Structure

It has a layer structure similar to that of black phosphorus. The Ge-S distances range from 247 to 300 pm. Molecular GeS in the gas phase has a Ge-S bond length of 201.21 pm.

References

1. Sutter, Eli; Zhang, Bo; Sun, Muhua; Sutter, Peter (2019-08-27). "Few-Layer to Multilayer Germanium(II) Sulfide: Synthesis, Structure, Stability, and Optoelectronics". ACS Nano. 13 (8): 9352–9362. doi:10.1021/acsnano.9b03986. ISSN 1936-0851. OSTI 1573814. PMID 31305983.
2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
3. ^ E. G. Rochow, E. W. Abel ,1973, The Chemistry of Germanium Tin and Lead, Pergamon Press, ISBN 0-08-018854-0
4. Michael Binnewies, Robert Glaum, Marcus Schmidt, Peer Schmidt, 2012, Chemical Vapor Transport Reactions, De Gruyter, ISBN 978-3-11-025464-8
5. Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, Florida: CRC Press. ISBN 0-8493-0487-3.

• Germanium(II) compounds
• Monosulfides