Platinum(II) acetate - Misplaced Pages

Platinum(II) acetate
Names

Other names platinum diacetate, platinum acetate
Identifiers
CAS Number	3375-34-6
3D model (JSmol)	Interactive image
ChemSpider	9326225
PubChem CID	11151117
CompTox Dashboard (EPA)	DTXSID501336798
InChI InChI=1S/2C2H4O2.Pt/c21-2(3)4;/h21H3,(H,3,4);/q;;+2/p-2Key: QCSGLAMXZCLSJW-UHFFFAOYSA-L
SMILES CC(=O).CC(=O).
Properties
Chemical formula	Pt(CH₃CO₂)₂
Molar mass	315.19 g/mol
Appearance	purple solid
Density	3.374 g/cm
Melting point	245 °C (473 °F; 518 K) decomposition
Solubility in water	chloroform
Structure
Crystal structure	tetragonal
Space group	P4₃2₁2, No. 96
Lattice constant	a = 10.254 Å, c = 50.494 Å
Formula units (Z)	8 tetrameric molecules
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Chemical compound

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

Preparation

Several syntheses of platinum(II) acetate have been reported. Geoffrey 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.

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

Structure

According to X-ray crystallography, the complex is tetrameric, in contrast to the trimeric palladium analog. The four platinum atoms form a square cluster, with eight bridging acetate ligands surrounding them. The compound has slight distortions from idealized D_2d symmetry. The crystal is tetragonal.

References

^ 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.
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.
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-". Inorganica Chimica Acta. 355: 399–403. doi:10.1016/S0020-1693(03)00314-1.
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.