929690-06-2Relevant academic research and scientific papers
Stepwise sulfuration of the terminal phosphide complex trans- [PtCl(PHCy2)2(PCy2)]
Gallo, Vito,Latronico, Mario,Mastrorilli, Piero,Nobile, Cosimo Francesco,Ciccarella, Giuseppe,Englert, Ulli
, p. 2634 - 2641 (2007/10/03)
The terminal phosphido complex trans-[PtCl(PHCy2) 2(PCy2)] (1) has been prepared, exploiting the reversibility of the reaction with HCl, by action of 1,8-diazabicyclo[5.4.0] undec-7-ene (DBU) on [PtCl(PHCy2)3]Cl, and its reactivity towards elemental sulfur studied. The first product obtained by reaction of 1 with 1 equiv. of sulfur is trans-[PtCl(PHCy2)2{κP- P(S)-Cy2}] (2), which rapidly isomerises in halogenated solvents into cis-[PtCl(PHCy2)2{κP-P(S)Cy2}] (3). Further addition of sulfur causes the formation of a mixture of [Pt(κ2S,S′-PS2Cy2)-(PHCy 2)2]Cl (4) and [Pt(κ2S,S′-PS 2Cy2){κP-P(S)Cy2}(PHCy2)] (5), which could be selectively synthesised; the first upon sulfuration of pure 3 and the second by reaction of 4 with 1 equiv. of sulfur in the presence of DBU. Complex 5 can be further sulfurated to [Pt(κ2S,S′- PCy2S2)(κS-PCy2S2)(PHCy 2)] (6), which is fluxional in solution and was also characterised by single-crystal X-ray diffraction. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
