Chloro(triphenylphosphine)gold(I)

Chloro(triphenylphosphine)gold(I)
Skeletal formula of chloro(triphenylphosphine)gold(I)
Space-filling model of the chloro(triphenylphosphine)gold(I) molecule
Identifiers
14243-64-2 YesY
Properties
C18H15AuClP
Molar mass 494.71 g·mol−1
Appearance Colorless solid
Melting point 236–237 °C (457–459 °F; 509–510 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Chloro(triphenylphosphine)gold(I) is the coordination complex with the formula (Ph3P)AuCl. 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] It crystallizes in the orthorhombic space group P212121 with a = 12.300(4) Å, b = 13.084(4) Å, c = 10.170(3) Å with Z = 4 formula units per unit cell. [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.

Reaction scheme of Au(I) and Au(III) organometallic compounds, with (Ph3P)AuCl as the precursor.

References

  1. ↑ Pierre Braunstein, Hans Lehner, Dominique Matt "A Platinum-Gold Cluster: Chloro-1κCl-Bis(Triethylphosphine-1κP)Bis(Triphenyl- Phosphine)-2κP, 3κP-Triangulo- Digold-Platinum(1 +) Trifluoromethanesulfonate" Inorganic Syntheses, 1990, Volume 27, Pages 218–221. doi: 10.1002/9780470132586.ch42
  2. ↑ Baenziger, N. C.; Bennett, W. E.; Soborofe, D. M. (1976). "Chloro(triphenylphosphine)gold(I)". Acta Crystallographica Section B. 32 (3): 962. doi:10.1107/S0567740876004330.
  3. ↑ Borissova, Alexandra O.; Korlyukov, Alexander A.; Antipin, Mikhail Yu.; Lyssenko, Konstantin A. (2008). "Estimation of Dissociation Energy in Donor−Acceptor Complex AuCl·PPh3via Topological Analysis of the Experimental Electron Density Distribution Function". The Journal of Physical Chemistry A. 112 (46): 11519–22. doi:10.1021/jp807258d. PMID 18959385.
  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
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