Chemical Properties of Sulfur dimer (CAS 23550-45-0)

InChI

InChI=1S/S2/c1-2

InChI Key

MAHNFPMIPQKPPI-UHFFFAOYSA-N

Formula

S2

SMILES

S=S

Molecular Weight¹

64.13

CAS

23550-45-0

Other Names

• sulfur (S2)
• sulfur molecule (S2)
• sulfur, diatomic

• C_p,gas : Ideal gas heat capacity (J/mol×K).
• EA : Electron affinity (eV).
• 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).
• S°_{gas,1 bar} : Molar entropy at standard conditions (1 bar) (J/mol×K).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
EA	[0.86; 2.50]	eV
EA	1.67 ± 0.01	eV	NIST
EA	1.66 ± 0.04	eV	NIST
EA	1.56 ± 0.05	eV	NIST
EA	0.86 ± 0.10	eV	NIST
EA	2.50 ± 0.80	eV	NIST
ΔfH°gas	128.60 ± 0.30	kJ/mol	NIST
ΔfusH°	7.38	kJ/mol	Joback Calculated Property
IE	[9.30; 10.10]	eV
IE	9.36 ± 0.00	eV	NIST
IE	9.40	eV	NIST
IE	9.36 ± 0.00	eV	NIST
IE	9.60 ± 0.20	eV	NIST
IE	9.50 ± 0.20	eV	NIST
IE	9.50 ± 0.30	eV	NIST
IE	9.38 ± 0.03	eV	NIST
IE	9.36 ± 0.02	eV	NIST
IE	9.80 ± 0.30	eV	NIST
IE	Outlier 10.10 ± 0.30	eV	NIST
IE	9.40 ± 0.10	eV	NIST
IE	9.38 ± 0.01	eV	NIST
IE	9.30	eV	NIST
IE	9.80 ± 0.50	eV	NIST
IE	9.42 ± 0.10	eV	NIST
IE	9.40 ± 0.05	eV	NIST
IE	9.32	eV	NIST
IE	9.36 ± 0.02	eV	NIST
IE	9.55	eV	NIST
IE	9.56	eV	NIST
logPoct/wat	-0.005		Crippen Calculated Property
McVol	39.260	ml/mol	McGowan Calculated Property
S°gas,1 bar	228.17 ± 0.01	J/mol×K	NIST

Cheméo can also estimate Normal Boiling Point Temperature, Normal melting (fusion) point, Critical Temperature, Critical Pressure, Critical Volume, Enthalpy of vaporization at standard conditions, Standard Gibbs free energy of formation, Acentric Factor, 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.

Correlations

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[32.54; 45.17]	J/mol×K	[298.00; 6000.00]	NIST
Equation			Y = A + B·t + C·t² + D·t³ + E/t², t = T/1000 Y is Cp,gas in J/mol×K, T in K
Coefficient A			3.35131e+01
Coefficient B			5.06536e+00
Coefficient C			-1.05967e+00
Coefficient D			8.99050e-02
Coefficient E			-2.11911e-01
Reference			Chase, 1998
Temperature range, min.			298.00
Temperature range, max.			6000.00
Cp,gas	32.54	J/mol×K	298.00	Calculated Property
Cp,gas	37.14	J/mol×K	931.56	Calculated Property
Cp,gas	39.10	J/mol×K	1565.11	Calculated Property
Cp,gas	40.44	J/mol×K	2198.67	Calculated Property
Cp,gas	41.38	J/mol×K	2832.22	Calculated Property
Cp,gas	42.07	J/mol×K	3465.78	Calculated Property
Cp,gas	42.65	J/mol×K	4099.33	Calculated Property
Cp,gas	43.27	J/mol×K	4732.89	Calculated Property
Cp,gas	44.07	J/mol×K	5366.44	Calculated Property
Cp,gas	45.17	J/mol×K	6000.00	Calculated Property

Similar Compounds

Find more compounds similar to Sulfur dimer.

Sources

• Cheméo Relay (1.0, beta) Beta: served but experimental, data-limited and below our cross-validation release bar; the Joback value is recommended where available.
• Crippen Method
• Crippen Method
• Gibbs free energy of formation of rhodium sulfides
• 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.
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