Diarylplatinum complexes

If the halogen is chlorine, the Pt(IV) adduct is stable. Diarylplatinum complexes of this type give stable adducts with either chlorine or iodine (43). 

Transmetallation, involving intermolecular transfer of the aryl ligand, also provides convenient routes for synthesis of arylplatinum(ii) complexes. Reactions of 2-methoxyphenyllithium with Pt complexes having optically active diphosphines, DIOP, BINAP, and chiraphos, produce the corresponding diarylplatinum complexes. NMR spectra show the presence of isomers due to restricted rotation around the Pt-G bond of the 2-methoxyphenyl ligand. Anionic... 

Ligand exchange is another important method to convert reported arylplatinum(ii) complexes into new ones, and [PtAr2(//-SMe2)] z is a convenient precursor of diarylplatinum complexes with various auxiliary ligands. 

Several arylplatinum complexes of Tl+ have been reported (Table 15). The anionic /rreacts with T1N03 to produce a chain polymer 120, in which successive Pt atoms are bridged to each other by two Tl+ ions (Scheme 28).112 The compound is an acetone solvate, and there also appear to be weak Tl F interactions in the solid-state structure. Upon irradiation (A = 441 nm), the complex exhibits an intense emission with a maximum at 678 nm. The luminescence is attributed to MLCT transitions. 

Coupling of a dianionic diarylplatinum(li) complex 316, prepared in situ, with a neutral dinucleat Pt(i) complex with bridging PPh2 ligands 317 forms a trinuclear anionic complex whose three Pt(ll) centers are bridged by PPh2 ligands (318, Equation (80)). ... 

---