Platinum(II) acetate

Platinum(II) acetate is a purple-colored coordination complex. The complex adopts an unusual structure consisting of a square array of Pt atoms.

Platinum(II) acetate
Names
Other names
platinum diacetate, platinum acetate
Identifiers
Properties
Pt(CH3CO2)2
Molar mass 315.19 g/mol
Appearance purple solid
Density 3.374 g/cm3
Melting point 245 °C (473 °F; 518 K) decomposition
chloroform
Structure[1]
tetragonal
P43212, No. 96
a = 10.254 Å, c = 50.494 Å
8 tetrameric molecules
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

Several syntheses of platinum(II) acetate have been reported. G. Wilkinson et al. reported a synthesis from sodium hexahydroxyplatinate, nitric acid, and acetic acid. This intermediate solution was reducted with formic acid. The procedure is not highly reproducible.[2]

Alternatively, the complex can be prepared by the reaction of silver acetate with platinum(II) chloride.[3]

Structure

According to X-ray crystallography, the complex is tetrameric, in contrast to the trimeric palladium analog.[4] The four platinum atoms form a square cluster, with eight bridging acetate ligands surrounding them. The compound has slight distortions from idealized D2d symmetry. The crystal is tetragonal.[1]

References
  1. de C. T. Carrondo, Maria A. A. F.; Skapski, Andrzej C. (1976). "X-Ray crystal structure of tetrameric platinum( II ) acetate: a square-cluster complex with short Pt–Pt bonds and octahedral co-ordination geometry". J. Chem. Soc., Chem. Commun. (11): 410–411. doi:10.1039/C39760000410. ISSN 0022-4936.
  2. T. A. Stephenson; S. M. Morehouse; A. R. Powell; J. P. Heffer; G. Wilkinson (1965). "Carboxylates of Palladium, Platinum, and Rhodium, and Their Adducts". Journal of the Chemical Society: 3632–3640. doi:10.1039/jr9650003632.
  3. Marino Basato; Andrea Biffis; Gianluca Martinati; Cristina Tubaro; Alfonso Venzo; Paolo Ganis; Franco Benetollo (2003). "Reaction of Platinum Acetate with Phosphines and Molecular Structure of trans-[Pt(OAc)2(PPh3)2]". Inorganica Chimica Acta. 355: 399. doi:10.1016/S0020-1693(03)00314-1.
  4. Markov, Alexander A.; Yakushev, Ilya A.; Churakov, Andrey V.; Khrustalev, Victor N.; Cherkashina, Natalia V.; Stolarov, Igor P.; Gekhman, Alexander E.; Vargaftik, Michael N. (2019). "Structure and Quantum Chemical Study of Crystalline Platinum(II) Acetate". Mendeleev Communications. 29 (5): 489–491. doi:10.1016/j.mencom.2019.09.003.
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