59765-06-9Relevant academic research and scientific papers
PROTONATION OF TERTIARY PHOSPHINE PLATINUM(0) COMPLEXES BY AMMONIUM ION. CHARACTERIZATION AND SOME REACTIONS OF THE RESULTING HYDRIDES
Goel, Ram G.,Srivastava, Ramesh C.
, p. 303 - 310 (2007/10/02)
The platinum(0) complexes Pt(PR3)2 (R3=(t-Bu)3 and (t-Bu)2Ph) react readily with the ammonium salts NH4X (X=PF6 and ClO4) to give the cationic ammine hydrides trans-X.Reaction of Pt(PPH3)3 with NH4PF6 affords PF6.The ammine hyd
A 31P Nuclear Magnetic Resonance Investigation of the Structure, Equilibria, and Kinetics of in Solution
Mann, Brian E.,Musco, Alfredo
, p. 776 - 785 (2007/10/02)
The compounds (L = PMe3, PMe2Ph, PMePh2, PEt3 or PBun3), n3, P(p-tolyl)3, P(CH2Ph)3, PPri3, or P(C6H11)3>, and i3, P(C6H11)3, or PBut2Ph> have been prepared and shown to exist in solution.In the cases of L = PMePh2, PEt3, PBun3, n = 3 and L = PPri3, P(C6H11)3, n = 2 it has proved possible to measure the equilibrium constant, ΔH, and ΔS for n+1>n> + L.For , , , , n3)4>, i3)3> and 3>, the tertiary phosphine exchange is dissociative, while for 13)2> and 2> associative exchange occurs.In the case of and n3)3> both associative and dissociative exchange occur, the relative rates of which depend on the temperature and concentration of free tertiary phosphine.In the cases of i3)2> and2> a marked solvent effect has been found and attributed to possible toluene co-ordination producing in equlibrium with .No evidence is found for steric crowding affecting ΔH or ΔH++, but ΔS and ΔS++ are affected due to interpenetration of the ligands and resulting loss of motional freedom, while previously it has been assumed that interligand steric crowding destabilizes the molecule via enthalpy term.
