Chemical Properties of bis(«eta»5-Cyclopentadienyl) chromium (CAS 1271-24-5)

InChI

InChI=1S/2C5H5.Cr/c2*1-2-4-5-3-1;/h2*1-5H;

InChI Key

OXPNGPODCRFNTM-UHFFFAOYSA-N

Formula

C10H10Cr

SMILES

[CH]12[CH]3[CH]4[CH]5[CH]1[Cr]23451678[CH]2[CH]1[CH]6[CH]7[CH]28

Molecular Weight¹

182.18

CAS

1271-24-5

Other Names

• Chromocene
• bis(«eta»5-cyclopenta-2,4-dien-1-yl)chromium

• Δ_cH°_solid : Standard solid enthalpy of combustion (kJ/mol).
• C_p,solid : Solid phase heat capacity (J/mol×K).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• Δ_fH°_solid : Solid phase enthalpy of formation at standard conditions (kJ/mol).
• Δ_subH° : Enthalpy of sublimation at standard conditions (kJ/mol).
• Δ_vapH : Enthalpy of vaporization at a given temperature (kJ/mol).
• IE : Ionization energy (eV).
• S°_{solid,1 bar} : Solid phase molar entropy at standard conditions (J/mol×K).
• T_fus : Normal melting (fusion) point (K).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ΔcH°solid	-6112.80 ± 2.10	kJ/mol	NIST
ΔfH°gas	[249.30; 257.00]	kJ/mol
ΔfH°gas	249.30 ± 2.90	kJ/mol	NIST
ΔfH°gas	257.00 ± 3.30	kJ/mol	NIST
ΔfH°solid	[178.30; 186.00]	kJ/mol
ΔfH°solid	178.30 ± 2.60	kJ/mol	NIST
ΔfH°solid	186.00 ± 3.00	kJ/mol	NIST
ΔsubH°	[62.80; 71.00]	kJ/mol
ΔsubH°	71.00 ± 1.30	kJ/mol	NIST
ΔsubH°	71.00	kJ/mol	NIST
ΔsubH°	62.80 ± 4.20	kJ/mol	NIST
IE	[5.50; 6.30]	eV
IE	5.50	eV	NIST
IE	6.30 ± 0.10	eV	NIST
IE	5.70	eV	NIST
IE	5.71	eV	NIST
S°solid,1 bar	[236.00; 236.00]	J/mol×K
S°solid,1 bar	236.00	J/mol×K	NIST
S°solid,1 bar	236.00	J/mol×K	NIST
Tfus	452.10 ± 0.50	K	NIST

Cheméo can also estimate Normal Boiling Point Temperature, 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.

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
Cp,solid	[198.50; 199.20]	J/mol×K	[298.00; 298.15]
Cp,solid	198.50	J/mol×K	298.00	NIST
Cp,solid	199.20	J/mol×K	298.15	NIST
Cp,solid	199.10	J/mol×K	298.15	NIST
ΔvapH	49.50 ± 1.50	kJ/mol	485.50	NIST

Similar Compounds

Find more compounds similar to bis(«eta»5-Cyclopentadienyl) chromium.

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.
• NIST Webbook

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