56261-10-0Relevant academic research and scientific papers
Synthesis and Dynamic Stereochemistry of the Complexes (SR)(H)> (R = H or Ph)
Cecconi, Franco,Innocenti, Paolo,Midollini, Stefano,Moneti, Simonetta,Vacca, Alberto,Ramirez, Jose A.
, p. 1129 - 1134 (2007/10/02)
The cis square-planar hydrido mercapto derivatives and have been prepared by reaction of with H2S or HSPh.Analysis of the 1H and 31P NMR data for the two complexes over a temperature range encompassing slow- and fast-exchange limits characterizes these molecules as stereochemically nonrigid on the NMR time-scale.The fluxional behaviour can be explained on the basis of intramolecular exchange of the unco-ordinated phosphorus atom of triphos with the phosphorus atom co-ordinated in cis position to the hydride ligand.At higher temperature, a complete scrambling of the three phosphorus atoms occurs, and at the fast-exchange limit the spin correlation between the phosphorus atoms and platinum metal is retained.The related complexes (dppp = Ph2PCH2CH2CH2PPh2), and have been prepared in order to clarify the mechanism of the fluxionality for (R = H or Ph).
