Chemical Properties of Disulfur monoxide (CAS 20901-21-7)

InChI

InChI=1S/OS2/c1-3-2

InChI Key

TXKMVPPZCYKFAC-UHFFFAOYSA-N

Formula

OS2

SMILES

O=S=S

Molecular Weight¹

80.13

CAS

20901-21-7

• ω : Acentric Factor.
• C_p,gas : Ideal gas heat capacity (J/mol×K).
• EA : Electron affinity (eV).
• Δ_fG° : Standard Gibbs free energy of formation (kJ/mol).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• Δ_fusH° : Enthalpy of fusion at standard conditions (kJ/mol).
• IE : Ionization energy (eV).
• logP_oct/wat : Octanol/Water partition coefficient.
• McVol : McGowan's characteristic volume (ml/mol).
• P_c : Critical Pressure (kPa).
• T_boil : Normal Boiling Point Temperature (K).
• T_c : Critical Temperature (K).
• T_fus : Normal melting (fusion) point (K).
• V_c : Critical Volume (m³/kmol).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	0.1813		Relay (1.0) Calculated Property
EA	1.88 ± 0.01	eV	NIST
ΔfG°	-130.71	kJ/mol	Joback Calculated Property
ΔfH°gas	-80.57	kJ/mol	Relay (1.0) Calculated Property
ΔfusH°	11.00	kJ/mol	Joback Calculated Property
IE	[10.30; 10.62]	eV
IE	10.58 ± 0.01	eV	NIST
IE	10.58 ± 0.01	eV	NIST
IE	10.58 ± 0.01	eV	NIST
IE	10.53 ± 0.02	eV	NIST
IE	10.52	eV	NIST
IE	10.62	eV	NIST
IE	Outlier 10.30 ± 0.10	eV	NIST
IE	10.52	eV	NIST
logPoct/wat	-0.339		Crippen Calculated Property
McVol	45.130	ml/mol	McGowan Calculated Property
Pc	9481.11	kPa	Joback Calculated Property
Tboil	315.97	K	Relay (1.0) Calculated Property
Tc	569.47	K	Relay (1.0) Calculated Property
Tfus	188.75	K	Relay (1.0) Calculated Property
Vc	0.151	m3/kmol	Relay (1.0) Calculated Property

Cheméo can also estimate Enthalpy of vaporization at standard conditions, Log10 of Water solubility in mol/l for this compound, but they fall outside the models' validated range, so they are not shown here. Open the prediction tool to compute them on demand.

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[52.18; 59.88]	J/mol×K	[325.26; 525.19]
Cp,gas	52.18	J/mol×K	325.26	Joback Calculated Property
Cp,gas	54.23	J/mol×K	358.58	Joback Calculated Property
Cp,gas	55.93	J/mol×K	391.90	Joback Calculated Property
Cp,gas	57.31	J/mol×K	425.23	Joback Calculated Property
Cp,gas	58.41	J/mol×K	458.55	Joback Calculated Property
Cp,gas	59.26	J/mol×K	491.87	Joback Calculated Property
Cp,gas	59.88	J/mol×K	525.19	Joback Calculated Property

Similar Compounds

Find more compounds similar to Disulfur monoxide.

Sources

• Cheméo Relay (1.0)
• Crippen Method
• Crippen Method
• Joback Method
• McGowan Method
• NIST Webbook

Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. The source is also providing more information like the publication year, authors and more. Take the time to validate and double check the source of the data.
Outlier This icon means that the value is more than 2 standard deviations away from the property mean.
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