Trimethylplatinum

All the trimethylplatinum(IV) species have a fac-arrangement of the methyls this is enforced in the [PtMe3X]4 oligomers, but nevertheless appears to reflect a genuine stereochemical preference (e.g. the isoelectronic /aoIr(PMe2Ph)3Me3, section 2.13.5). 

Platinum Compounds. Several Pt compds, including trimethylplatinum derivatives are explosively unstable (Ref 9). Ammipentahydroxo-platinum, H8NOsPt, explds fairly violently above 250°, as does the pyridine analogue (Ref 3). Ammonium Hexachloroplatinate(2-),... 

Trimethylplatinum(IV) azide tetramer See Dodecamethyltetraplatinum(IV)azide Trimethyl phosphite See other phosphorus esters... 

The salt is a heat and shock-sensitive explosive. Attempts to prepare it from trimethylplatinum hydroxide and perchloric acid led to violent explosions at higher acid concentrations. 

Iodo (trimethyl) platinum (IV) is a yellow crystalline product which decomposes at 190 to 195°. It is soluble in most nonpolar solvents and essentially insoluble in polar media such as water and acetone. In benzene solution, the iodo derivative is tetrameric.6 X-ray investigations have shown that in chloro-(trimethyl) platinum four platinum atoms describe a tetrahedron as do the four chlorine atoms, and the two tetrahedra are interpenetrating so as to give a cubic array of platinum and chlorine atoms. Each platinum atom is bonded to three chlorine atoms and to three terminal methyl groups. Some of the trimethylplatinum derivatives of organic chelate ligands are dimeric and in these structures the platinum is again six-coordinate.7... 

A white crystalline material of the composition PtI(CH3)3 has been obtained in the following fashion.4 The yellow iodo derivative is converted to the sulfate by metathesis with silver sulfate. Addition of potassium iodide solution to an aqueous solution of trimethylplatinum(IY) sulfate yields a precipitate which, if recovered immediately by filtration, is white, analyzes precisely for PtI(CH3)3, is free of solvent, and decomposes at 190 to 200°. 

Several platinum compounds, including trimethylplatinum derivatives, are explosively unstable. Some compounds of the other platinum group metals are also of... 

N, N, N, A -Tetramethylethane-1,2-diamine, trimethylpalladium(IV) iodide, 3226 Triamminenitratoplatinum(II) nitrate, 4582 Trimethylplatinum hydroxide, 1329... 

Trimethyl phosphorothioate, see Trimethyl thiophosphate, 1312 Trimethylplatinum hydroxide, 1325... 

Several platinum compounds, including trimethylplatinum derivatives, are explosively unstable. Some compounds of the other platinum group metals are also of limited stability. Individually indexed compounds are Amminedecahydroxydiplatinum, 4588 Amminepentahydroxyplatinum, 4566 Ammonium hexachloroplatinate, 4180 Ammonium tetranitroplatinate(II), 4573 Diacetatoplatinum(II) nitrate, 1507 Diamminedichloroamidotrichloroplatinum(IV), 4173... 

Triamminenitratoplatinum(II) nitrate, 4577 Trimethylplatinum hydroxide, 1325 See also gold compounds See Other HEAVY METAL DERIVATIVES... 

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