Vaska's complex

Vaska's complex
Names
	IUPAC name (SP-4-1)-carbonylchloridobis(triphenylphosphane)iridium(I)
	Other names Iridium(I)bis(triphenylphosphine); carbonyl chloride; Vaska's complex; Vaska's compound
Identifiers
CAS Number	14871-41-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	21106488 ;
ECHA InfoCard	100.035.386
EC Number	238-941-6;
PubChem CID	73553235 (incorrect formula);
UNII	J8AO572UZW ;
	InChI InChI=1S/2C18H15P.CO.ClH.Ir/c21-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;1-2;;/h21-15H;;1H;/q;;;;-1/p+1 Key: ZOMWXKQUBRXYLE-UHFFFAOYSA-O ; InChI=1/2C18H15P.CO.ClH.Ir/c21-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;1-2;;/h21-15H;;1H;/q;;;;-1/p+1/rC37H32ClIrOP2/c38-39(31-40,41(32-19-7-1-8-20-32,33-21-9-2-10-22-33)34-23-11-3-12-24-34)42(35-25-13-4-14-26-35,36-27-15-5-16-28-36)37-29-17-6-18-30-37/h1-30,41-42H Key: ZOMWXKQUBRXYLE-JPKJWYTPAA;
	SMILES c1ccc(cc1)[P+](c2ccccc2)(c3ccccc3)[Ir-2](=C=O)([P+](c4ccccc4)(c5ccccc5)c6ccccc6)Cl;
Properties
Chemical formula	IrCl(CO)[P(C6H5)3]2.
Molar mass	780.25 g/mol
Appearance	yellow crystals
Melting point	215 °C (419 °F; 488 K) (decomposes)
Boiling point	360 °C (680 °F; 633 K)
Solubility in water	insol
Structure
Coordination geometry	sq. planar
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	none
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H302, H311, H312, H315, H319, H331, H332, H335
Precautionary statements	P261, P264, P270, P271, P280, P301+P310, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P311, P312, P321, P322, P330, P332+P313, P337+P313, P361, P362, P363, P403+P233, P405, P501
Related compounds
Other anions	IrI(CO)[P(C6H5)3]2
Other cations	RhCl(CO)[P(C6H5)3]2
Related compounds	Pd[P(C6H5)3]4
	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

Vaska's complex is the trivial name for the chemical compound trans-carbonylchlorobis(triphenylphosphine)iridium(I), which has the formula IrCl(CO)[P(C₆H₅)₃]₂. This square planar diamagnetic organometallic complex consists of a central iridium atom bound to two mutually trans triphenylphosphine ligands, carbon monoxide and a chloride ion. The complex was first reported by J. W. DiLuzio and Lauri Vaska in 1961. Vaska's complex can undergo oxidative addition and is notable for its ability to bind to O₂ reversibly. It is a bright yellow crystalline solid.