Synthesis and Reactivity of Hydroxo-bridged Binuclear Platinum Complexes. Crystal Structure of 2

Article abstract of DOI:10.1039/DT9920000053

The reaction of 2<(Pt(C5X5)2(μ-Cl))2> with NBu4OH(aq) in acetone leads to the formation of the hydroxo-complexes 2<(Pt(C6X5)2(μ-OH))2> (X = F 1 or Cl 2).These react with weak protic acids such as acetylacetone (Hacac), benzoylacetone (Hbzac) and 8-hydroxyquinoline (Hquin) yielding the mononuclear complexes (X = F, L-L = acac 3, bzac 4, or quin 5; X = Cl, L-L = acac 6, bzac 7, or quin 8).Treatment of complexes 1 and 2 with PhCN in the presence of HBF4 gives the mononuclear compounds cis- (X = F 9 or Cl 10).When the benzonitrile complexes are treated with aniline the corresponding cis- (X = F 11 or Cl 12) are formed.The benzamido derivatives (X = F 13 or Cl 14) are formed when complexes 9 and 10 are treated with NBu4OH(aq) in acetone, and thermal treatment of 13 yields 2<(Pt(C6X5)2(μ-HNOCPh))2> 15.Complexes 9 and 10 react with methanol in the presence of NBu4OH to give the corresponding imido ester dervatives (X = F 16 or Cl 17).Spectroscopic (IR, 1H and 19F) data have been used for structural assignments, and an X-ray structure determination carried out for 2<(Pt(C6F5)2(μ-OH))2>has established the centrosymmetric binuclear nature of the anion <(C6F5)2Pt(μ-OH)2Pt(C6F5)2>^2-.The structure has been solved and refined up to R = 0.049 and R'= 0.056 based on 2278 observed reflections.The Pt atoms are four-co-ordinated and show slight deviations from a square-planar arrangement.

Full text of DOI:10.1039/DT9920000053

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