High-pressure vibrational study of the catalyst candidate cis-dimercaptobis(triphenylphosphine)platinum(II), cis-[(Ph3P)2Pt(SH)2].
Infrared and FT-Raman spectra of cis-dimercaptobis(triphenylphosphine)platinum(II), cis-[(PPh3)2Pt(SH)2], have been measured at high external pressures up to 55 kbar with the aid of a diamond-anvil cell (DAC). The wavenumber (v) versus pressure (P) plots from the Raman data indicate the occurrence of a pressure-induced phase transition at around 15 kbar. The metal-ligand stretching mode, v(Pt-S), and the C-H stretching mode of the phenyl rings, v(C-H), are highly sensitive to the application of pressure (dv/dP approximately 1.0 cm(-1) kbar(-1)). The IR results are generally consistent with the Raman data. The pressure-induced phase transition is most probably attributable to the reorientation of the phenyl rings in the complex; similar results have been obtained for other phenyl derivatives.
Song
Yuanyuan
Y
Department of Chemistry, McGill University, Montreal, Quebec, Canada.
Butler
Ian S
IS
Shaver
Alan
A
D002384:Catalysis; D004787:Environmental Pollution / Q000517:prevention & control; D015394:Molecular Structure; D009944:Organoplatinum Compounds / Q000737:chemistry*; D017671:Platinum Compounds / Q000737:chemistry*; D011312:Pressure; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014732:Vibration
D009944:Organoplatinum Compounds; D017671:Platinum Compounds; C474745:dimercaptobis(triphenylphosphine)platinum II