Chloro(triphenylphosphine)gold(I)

Chloro(triphenylphosphine)gold(I)
Identifiers
CAS number	!14243-64-2
Properties
Molecular formula	C18H15AuClP
Molar mass	494.71 g mol−1
Appearance	Colorless solid
Melting point	236-237 °C
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Infobox references

Chloro(triphenylphosphine)gold(I) is the coordination complex with the formula (Ph₃P)AuCl (Ph = phenyl). This colorless solid is the complex of triphenylphosphine and gold(I) chloride.

Preparation and structure

The complex is prepared by reducing chloroauric acid with triphenylphosphine in 95% ethanol:^[1]

HAuCl₄ + H₂O + 2 PPh₃ → (Ph₃P)AuCl + Ph₃PO + 3 HCl

The complex adopts a linear coordination geometry, which is typical of most gold(I) compounds.^[2][3]

Reactivity

It is a common reagent in gold chemistry. Many related gold complexes (often incorrectly called salts) can be prepared including the trifluoromethanesulfonate and the nitrate.^[4]

Triphenylphosphine gold triflate (Ph₃PAuOTf) catalyzes certain rearrangement reactions in organic synthesis.

References

1. ^ Pierre Braunstein, Hans Lehner, Dominique Matt "A Platinum-Gold Cluster: Chloro-¹κ^Cl-Bis(Triethylphosphine-¹κ^P)Bis(Triphenyl- Phosphine)-2κP, 3κP-Triangulo- Digold-Platinum(1 +) Trifluoromethanesulfonate" Inorganic Syntheses, 1990, Volume 27, Pages 218–221. doi: 10.1002/9780470132586.ch42
2. ^ . doi:10.1107/S0567740876004330. 
3. ^ . doi:10.1021/jp807258d. 
4. ^ A. M. Mueting, B. D. Alexander, P. D. Boyle, A. L. Casalnuovo, L. N. Ito, B. J. Johnson, L. H. Pignolet "Mixed-Metal-Gold Phosphine Cluster Compounds" Inorganic Syntheses, 1992, Volume 29, Pages 279–298, 2007. doi:10.1002/9780470132609.ch63