Potassium tetraiodoplatinate

Potassium tetraiodoplatinate

Identifiers
CAS Number	14708-56-6 anhydrous
3D model (JSmol)	Interactive image
PubChem CID	12864171
InChI InChI=1S/4HI.2K.Pt/h4*1H;;;/q;;;;2*+1;+2/p-4 Key: WYVJXXSNNPZRSS-UHFFFAOYSA-J
SMILES [K+].[K+].[I-][Pt+2]([I-])([I-])[I-]
Properties
Chemical formula	H4I4K2O2Pt
Molar mass	816.928 g·mol−1
Appearance	black solid
Density	4.31 g/cm3 [1]
Related compounds
Other anions	Potassium tetrachloroplatinate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Potassium tetraiodoplatinate is the inorganic compound with the formula K₂PtI₄·(H₂O)₂. It is the potassium salt of tetraiodoplatinate, a square planar complex of platinum(II). The compound crystallizes from water as the dihydrate, ^[1] whereas the related chloride and bromide K₂PtCl₄ and K₂PtBr₄ are obtained only as the anhydrous salts.

It reacts with amines and with ammonia to give charge-neutral derivatives PtI₂(RNH₂)₂. ^[2] The compound is prepared by the salt metathesis reaction of potassium iodide and potassium tetrachloroplatinate: ^[3]

K₂PtCl₄ + 4 KI → K₂PtI₄ + 4 KCl

Potassium tetraiodoplatinate is a precursor to the anticancer drug cisplatin.

References

1. Olsson, Lars-Fride; Oskarsson, Åke; Larsen, Sine; Teuber, Lene; Lucanska, Brigitta; Krätsmar-Smogrovic, Juraj; Valent, Aladár; Alminger, Tomas; Erickson, Magnus; Grundevik, Inger; Hagin, Inger; Hoffman, Kurt-Jürgen; Johansson, Svante; Larsson, Sam; Löfberg, Ingalil; Ohlson, Kristina; Persson, Björn; Skånberg, Inger; Tekenbergs-Hjelte, Lija (1989). "The Crystal Structure of Potassium Tetraiodoplatinate(II) Dihydrate". Acta Chemica Scandinavica. 43: 811–812. doi:10.3891/acta.chem.scand.43-0811.
2. Rochon, Fernande D.; Buculei, Viorel (2004). "Multinuclear NMR Study and Crystal Structures of Complexes of the Types cis- and trans-Pt(amine)₂I₂". Inorganica Chimica Acta. 357 (8): 2218–2230. doi:10.1016/j.ica.2003.10.039.
3. Olsson, Lars-Fride (1989). "Dipotassium Tetraiodoplatinate(II) Dihydrate". Inorganic Syntheses. Vol. 25. pp. 98–100. doi:10.1002/9780470132562.ch21. ISBN   978-0-471-61874-4.