26202-54-0Relevant academic research and scientific papers
Evidence for long-range electronic effects in hexaplatinum clusters: The case of phosphite ligand addition and migration
Spivak, Greg J.,Puddephatt, Richard J.
, p. 1 - 3 (2008/10/08)
The 84-electron cluster [Pt6(μ2CO)6(μ2-dppm) 3] (1) (dppm = Ph2PCH2PPh2) forms an adduct with the phosphite P(OCH2)3CMe to give the 86-electron cluster [Pt6(μ2-CO)6(μ2-dppm) 3{P(OCH2)3CMe}] (2). The phosphite ligand in 2 is fluxional as shown by a variable temperature NMR study between 20 and -90°C. At low temperatures the spectra indicate a structure in which the phosphite is terminally bound to one platinum atom, while at temperatures above -70°C, the complex is fluxional with the phosphite migrating rapidly around a triangular face of the cluster. The selective formation of only a 1:1 complex, coupled with the predictions of EHMO theory, provides good evidence for long-range electronic effects across the hexaplatinum cluster.
