Chromocene

Chromocene
Chromocene	Chromocene
Names
	IUPAC name Bis(η5-cyclopentadienyl)chromium(II)
	Other names Dicyclopentadienylchromium(II)
Identifiers
CAS Number	1271-24-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:30677;
ChemSpider	71485;
ECHA InfoCard	100.013.670
EC Number	215-036-4;
Gmelin Reference	3366
PubChem CID	79154;
RTECS number	GB7600000;
UNII	FI251W8B1L ;
UN number	1325
CompTox Dashboard (EPA)	DTXSID7024615 ;
	InChI InChI=1/2C5H5.Cr/c21-2-4-5-3-1;/h21-5H;/q2*-1;+2 Key: TYYBBNOTQFVVKN-UHFFFAOYAS;
	SMILES [Cr+2].[cH-]1cccc1.c1[cH-]ccc1;
Properties
Chemical formula	C10H10Cr
Molar mass	182.186 g·mol−1
Appearance	dark red crystals
Density	1.43 g/cm3
Melting point	168 to 170 °C (334 to 338 °F; 441 to 443 K)
Boiling point	Sublimes (under vacuum)
Solubility in water	Insoluble
Structure
Coordination geometry	Pseudooctahedral; see Ferrocene
Dipole moment	0 D
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Pyrophoric
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H312, H314, H315, H317, H319, H332, H335
NFPA 704 (fire diamond)	1 0 0
Related compounds
Related compounds	Fe(C5H5)2; Ni(C5H5)2; bis(benzene)chromium; chromium(II) acetate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chromocene is the organochromium compound with the formula [Cr(C₅H₅)₂]. Like structurally related metallocenes, chromocene readily sublimes in a vacuum and is soluble in non-polar organic solvents. It is more formally known as bis(η⁵-cyclopentadienyl)chromium(II).^[1]

^ Crabtree, R. H. (2009). The Organometallic Chemistry of the Transition Metals (5th ed.). Hoboken, NJ: John Wiley and Sons. p. 2. ISBN 978-0-470-25762-3.

[1] Crabtree, R. H. (2009). The Organometallic Chemistry of the Transition Metals (5th ed.). Hoboken, NJ: John Wiley and Sons. p. 2. ISBN 978-0-470-25762-3.

[1]