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

C12C3C4C5C1[Cr]23451678C2C1C6C7C28

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

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

• NIST Webbook

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