Dicobalt octacarbonyl

Dicobalt octacarbonyl
	; Co2(CO)8 soaked in hexanes
Names
	IUPAC name Octacarbonyldicobalt(Co—Co)
	Other names Cobalt carbonyl (2:8), di-mu-Carbonylhexacarbonyldicobalt, Cobalt octacarbonyl, Cobalt tetracarbonyl dimer, Dicobalt carbonyl, Octacarbonyldicobalt
Identifiers
CAS Number	10210-68-1 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	2007057 ;
ECHA InfoCard	100.030.454
EC Number	233-514-0;
PubChem CID	25049;
RTECS number	GG0300000;
UNII	MDH533S43Q ;
UN number	3281
CompTox Dashboard (EPA)	DTXSID10895040 ;
	InChI InChI=1S/8CO.2Co/c81-2;;/q;;;;;;;;2+2 Key: MQIKJSYMMJWAMP-UHFFFAOYSA-N ; InChI=1/8CO.2Co/c81-2;;/q;;;;;;;;2+2 Key: MQIKJSYMMJWAMP-UHFFFAOYAG;
	SMILES O=C=[Co]1(=C=O)(=C=O)C(=O)[Co](=C=O)(=C=O)(=C=O)C1=O; O=C=[Co-4](=C=O)(=C=O)(=C=O)[Co-4](=C=O)(=C=O)(=C=O)=C=O;
Properties
Chemical formula	Co2(CO)8
Molar mass	341.95 g/mol
Appearance	red-orange crystals;
Density	1.87 g/cm3
Melting point	51 to 52 °C (124 to 126 °F; 324 to 325 K)
Boiling point	52 °C (126 °F; 325 K) decomposes
Solubility in water	insoluble
Vapor pressure	0.7 mmHg (20 °C)
Structure
Dipole moment	1.33 D (C2v isomer); 0 D (D3d isomer)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Potential carcinogen
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H251, H302, H304, H315, H317, H330, H351, H361, H412
Precautionary statements	P201, P260, P273, P280, P304+P340+P310, P403+P233
NFPA 704 (fire diamond)	4 3 1
Flash point	-23 °C (-9.4 °F)
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	15 mg/kg (oral, rat)
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 0.1 mg/m3
IDLH (Immediate danger)	N.D.
Safety data sheet (SDS)	External SDS
Related compounds
Related metal carbonyls	Iron pentacarbonyl; Diiron nonacarbonyl; Nickel tetracarbonyl
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Dicobalt octacarbonyl is an organocobalt compound with composition Co₂(CO)₈. This metal carbonyl is used as a reagent and catalyst in organometallic chemistry and organic synthesis, and is central to much known organocobalt chemistry. It is the parent member of a family of hydroformylation catalysts. Each molecule consists of two cobalt atoms bound to eight carbon monoxide ligands, although multiple structural isomers are known. Some of the carbonyl ligands are labile.

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