Trimethylplatinum iodide is the
organoplatinum complex with the formula
CH3)3PtIsub>4. It is a white, air-stable solid that was one of the first organometallic complexes reported. It arises from the reaction of
potassium hexachloroplatinate
Potassium hexachloroplatinate is the inorganic compound with the formula K2PtCl6. It is a yellow solid that is an example of a comparatively insoluble potassium salt. The salt features the hexachloroplatinate(IV) dianion, which has octahedral coor ...
with
methylmagnesium iodide
Methylmagnesium chloride is an organometallic compound with the general formula CH3MgCl. This highly flammable, colorless, and moisture sensitive material is the simplest Grignard reagent and is commercially available, usually as a solution in tet ...
. The complex exists as a
tetramer
A tetramer () (''tetra-'', "four" + '' -mer'', "parts") is an oligomer formed from four monomers or subunits. The associated property is called ''tetramery''. An example from inorganic chemistry is titanium methoxide with the empirical formula Ti ...
: a
cubane-type cluster
A cubane-type cluster is an arrangement of atoms in a molecular structure that forms a cube. In the idealized case, the eight vertices are symmetry equivalent and the species has Oh symmetry. Such a structure is illustrated by the hydrocarbon cub ...
with four octahedral Pt(IV) centers linked by four iodides as triply
bridging ligand
In coordination chemistry, a bridging ligand is a ligand that connects two or more atoms, usually metal ions. The ligand may be atomic or polyatomic. Virtually all complex organic compounds can serve as bridging ligands, so the term is usually r ...
s.
[{{cite journal, authors=Ebert, K. H.; Massa, W.; Donath, H.; Lorberth, J.; Seo, B. S.; Herdtweck, E., title=Organoplatinum Compounds: VI. Trimethylplatinum Thiomethylate and Trimethylplatinum Iodide. The Crystal Structures of CH3)3PtS(CH3)sub>4 and CH3)3PtIsub>4·0.5CH3I, journal=J. Organomet. Chem., year=1998, volume=559, issue=1–2 , pages=203–207, doi=10.1016/S0022-328X(98)00414-8]
The complex undergoes diverse reactions involving cleaving Pt-I bridges. Derived complexes include (CH
3)
3PtI(bipy) and (CH
3)
3PtI(NH
3)
2. Replacement of the iodide with hydroxide gives
CH3)3PtOHsub>4.
References
Organoplatinum compounds
Iodo complexes