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.^[1] 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.

^ Lauri Vaska; J. W. DiLuzio (1961). "Carbonyl and Hydrido-Carbonyl Complexes of Iridium by Reaction with Alcohols. Hydrido Complexes by Reaction with Acid". Journal of the American Chemical Society. 83 (12): 2784–2785. doi:10.1021/ja01473a054.

[1] Lauri Vaska; J. W. DiLuzio (1961). "Carbonyl and Hydrido-Carbonyl Complexes of Iridium by Reaction with Alcohols. Hydrido Complexes by Reaction with Acid". Journal of the American Chemical Society. 83 (12): 2784–2785. doi:10.1021/ja01473a054.

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