Polymeric precursors of giant clusters

Molecular weight measurements showed n = 6 and m = S. On the basis of ESC A data (Pt4f7/2 72.1 eV), the oxidation state of Pt atoms in these complexes is (-1-1). 

Reduction of [(Ph3P)Pt(OAc)2]2 with formic acid accompanied by dephenylation affords complexes with Ph2P and PhP ligands  

According to SAXS data, the molecules of platinum phosphide complex [(PPh2)Pt]g io are almost spherical in shape with a mean diameter of 15.2 A. Unlike the platinum analog, treatment of the palladium complex [ (Ph3 P)Pd(OAc)2]2 

SAXS data showed that the molecules of the palladium complex [Pd2(PPh2)H c]n are nearly spherical in shape with a diameter of 15.6 A. EXAFS data showed that both the platinum, [(PPh2)Pt]8 -io, and palladium, [Pd2(PPh2)Hx] , complexes contained only phosphorus and metal atoms in the first coordination sphere. The interatomic distance between Pt(Pd) and the phosphorus atoms is 2.26 A, which is typical of the Pt(Pd)-P distances in platinum and palladium complexes. Comparison with the spectral data of the reference compound, Pd(PPh3)4, showed that each platinum atom is surrounded by four phosphorus atoms (the coordination number, u(P/Pt), is four). The corresponding value for palladium atoms, (P/Pd), is three. 

It follows that reduction reactions of the Pd and Pt phosphine complexes are often complicated by destructive splitting of the phosphine ligands, resulting in non- 

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