Platinum complexes carbon disulphide

The first cyclopropene transition metal complexes isolated were stable Pt(0) species, e.g. 296. These are obtained from the displacement of ethylene in various platinum complexes by cyclopropene and analogous Ni(0) complexes are now available The dominant bonding is of the 7r-type with the lengthened C(l)-C(2) bond reflecting a significant relief of strain upon complexation. Complex 296 liberates the cyclopropene upon treatment with carbon disulphide. 

Diglucosyl disulphide octa-acetate has afforded a platinum complex, and the dithlocarbamate derivative (19) has been synthesized from the methyl-2-amino-2-deoxy-a-D-glucopyranoslde acetal by use of carbon disulphide followed by bis-triphenylphosphineplatinum dichloride... 

A convenient way of storing and purifying the strained olefin bicyclo[2,2,0]hex-l(4)-ene is by formation of a platinum complex (776), whose structure has been confirmed by 2f-ray analysis. The olefin is readily liberated from (776) by carbon disulphide and undergoes the expected Diels-Alder reaction with cyclopentadiene. Addition of ethanol to (776) is accompanied by opening of the strained internal bond to give the metallocycle (777). ... 

As mentioned previously (see p. 138), carbon disulphide inserts into the platinum-fluorine bond of [PtF(PPhs)j]+ to give the hydrolytically unstable complex cation (137). ... 

Carbon Disulphide.—The kinetics of reaction of /rartJ-[Pt(X)(H)(PRs)a], where R = Et or Ph, with carbon disulphide in methanol indicate at least two stages in the reaction. The first step has a dependence of rate on the concentration of the platinum complex and of the carbon disulphide the rate of the second step is independent of carbon disulphide concentration, suggesting an intramolecular process. The whole sequence proposed is shown in Scheme 2. Whereas the product (18) of this reaction is thought... 

Carbon disulphide has been found to act as a 2-electron ligand to platinum in the complex 1.20 [99]. 

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