Disulfur

Disulfur
	Ball and stick model of disulfur molecule
Names
	IUPAC name Disulfur
	Systematic IUPAC name Disulfene
	Other names Diatomic sulfur; Sulfur dimer ; Disulphur
Identifiers
CAS Number	23550-45-0 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:29387 ;
ChemSpider	4574100 ;
Gmelin Reference	753
PubChem CID	5460602;
CompTox Dashboard (EPA)	DTXSID20420100 ;
	InChI InChI=1S/S2/c1-2 Key: MAHNFPMIPQKPPI-UHFFFAOYSA-N ;
	SMILES S=S;
Properties
Chemical formula	S2
Molar mass	64.12 g·mol−1
Dipole moment	0 D
Thermochemistry
Heat capacity (C)	32.51 kJ K−1 mol−1
Std molar; entropy (S⦵298)	228.17 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	128.60 kJ mol−1
Related compounds
Related compounds	Triplet oxygen
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Disulfur is the diatomic molecule with the formula S₂.^[2] It is analogous to the dioxygen molecule but rarely occurs at room temperature. This violet gas is the dominant species in hot sulfur vapors. S₂ is one of the minor components of the atmosphere of Io, which is predominantly composed of SO₂.^[3] The instability of S₂ is usually described in the context of the double bond rule.

^ ebi.ac.uk/chebi/searchId.do?chebiId=29387
^ Steudel, Ralf; Eckert, Bodo (2003). "Solid Sulfur Allotropes". Elemental Sulfur and Sulfur-Rich Compounds I. Topics in Current Chemistry. Vol. 230. pp. 58–68. doi:10.1007/b12110. ISBN 978-3-540-40191-9.
^ Lellouch, E. (January 2005). "Io's Atmosphere and Surface–Atmosphere Interactions". Space Science Reviews. 116 (1–2): 211–224. Bibcode:2005SSRv..116..211L. doi:10.1007/s11214-005-1957-z. S2CID 121867974.

[1] .ac.uk/chebi/searchId.do?chebiId=29387

[2] Steudel, Ralf; Eckert, Bodo (2003). "Solid Sulfur Allotropes". Elemental Sulfur and Sulfur-Rich Compounds I. Topics in Current Chemistry. Vol. 230. pp. 58–68. doi:10.1007/b12110. ISBN 978-3-540-40191-9.

[3] Lellouch, E. (January 2005). "Io's Atmosphere and Surface–Atmosphere Interactions". Space Science Reviews. 116 (1–2): 211–224. Bibcode:2005SSRv..116..211L. doi:10.1007/s11214-005-1957-z. S2CID 121867974.

[1]

[2]

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Names
Ball and stick model of disulfur molecule

IUPAC name Disulfur^[1]
Systematic IUPAC name Disulfene
Other names Diatomic sulfur Sulfur dimer Disulphur
Identifiers
CAS Number	23550-45-0^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:29387^Y
ChemSpider	4574100^Y
Gmelin Reference	753
PubChem CID	5460602
CompTox Dashboard (EPA)	DTXSID20420100
InChI InChI=1S/S2/c1-2^Y Key: MAHNFPMIPQKPPI-UHFFFAOYSA-N^Y
SMILES S=S
Properties
Chemical formula	S₂
Molar mass	64.12 g·mol⁻¹
Dipole moment	0 D
Thermochemistry
Heat capacity (C)	32.51 kJ K⁻¹ mol⁻¹
Std molar entropy (S^⦵₂₉₈)	228.17 J K⁻¹ mol⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	128.60 kJ mol⁻¹
Related compounds
Related compounds	Triplet oxygen
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references