Platinum–lead bonded complexes
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 2873-2878
- https://doi.org/10.1039/j19680002873
Abstract
The new platinum–lead bonded complexes trans-[PtL2(PbPh3)2](I)(L = PEt3,AsEt3) prepared by the reaction of cis- or trans-[PtL2Cl2] with LiPbPh2 are described. Such complexes undergo platinum–lead bond cleavage with various reactants. Thus, potassium cyanide in ethanol gives K2[Pt(CN)4] and (C5H6)6Pb2. Bromine in CCl4 affords trans-[Pt(PEt3)2Br2] and (C6H5)2PbBr2. Hydrogen chloride in benzene leads to trans-[Pt(PEt3)2Cl2] and PbCl2. Homogeneous hydrogenolysis gives an oil tentatively formulated as trans-[Pt(PEt3)2(PbPh3)H]. The complexes undergo neutral ligand exchange with Ph2P·CH2·CH2PPh2(diphos) to give cis-[Pt(diphos)(PbPh3)2]. The above metal–metal bond cleavage reactions are interpreted in terms of primary addition to platinum leading to six-co-ordinated intermediates. I.r. spectra of the new products are reported. The strength and stability of heterogeneous metal–metal bond in (I) are discussed in relation to similar systems.Keywords
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