60859-71-4Relevant academic research and scientific papers
Contributions to the Chemistry of Phosphorus, 88: 1,2,3-Triphenyl-1,3-bis(trimethylsilyl)triphosphane
Baudler, Marianne,Reuschenbach, Goswin,Koch, Dieter,Carlsohn, Burkhard
, p. 1264 - 1271 (2007/10/02)
The reaction of 1,3-dipotassium 1,2,3-triphenyltriphosphide, K2(PPh)3, with chlorotrimethylsilane yields the hitherto unknown title compound Me3Si(Ph)P-P(Ph)-P(Ph)SiMe3 (1), which is remarkably stable against disproportionation reactions.In solution it forms the three diastereomers 1a (erythro/erythro), 1b (erythro/threo), and 1c (threo/threo) in a ratio of about 8:3:1, between which a dynamic equilibrium exists due to pyramidal inversion at the P-atoms.The correlation between the 31P-NMR-spectroscopically observed spin systems and the diastereomers 1a-c results from the significant dependence of the 1JPP-coupling constants on dihedral angles.The preferred trans arrangement of the bulky SiMe3- and P(Ph)SiMe3 groups at adjacent P-atoms leads to a trans-conformation of the lone electron pairs in the erythro- and to a gauche-conformation in the threo-configuration.
