136953-70-3Relevant academic research and scientific papers
Synthesis and reactivity of platinum and palladium complexes with a phosphorus analogue of 2,2′-bipyridine, NIPHOS. X-ray crystal structure of [PtCl(NIPHOSH·OMe)(PMe3)][SbF6]
Schmid, Bruno,Venanzi, Luigi M.,Albinati, Alberto,Mathey, Fran?ois
, p. 4693 - 4699 (2008/10/08)
The cations [MCl(NIPHOS)(L)]+ (M = Pt (3), L = PPh3, PMePh2, PMe2Ph, PMe3, P-n-Bu3; M = Pd (7d), L = PMe3; NIPHOS = 2-(2-pyridyl)-4,5-dimethylphosphinine) were prepared and characterized by NMR spectroscopy (1H, 31P, 195Pt). It is shown that the chemical shift of the phosphorus atom of the coordinated NIPHOS is only slightly affected by variations of the ligand L. Complexes of the types 3 and 7 add water, alcohols, or thiols regioselectively at the P-C6 double bond forming complexes of the type [MCl(NIPHOSH·Y)(L)]+ (M = Pt, Y = OH, L as above and AsMe2Ph; M = Pt, Y = OMe, O-i-Pr, O-i-Am, OPh, SPh, L = PMe3; M = Pd, Y = OH, OMe, L = PMe3) in which the Y moiety is bonded to the phosphorus atom. They were characterized by NMR spectroscopy (1H, 31P, 195Pt). The X-ray crystal structure of [PtCl(NIPHOSH·OMe)(PMe3)][SbF6] was determined. The crystals belong to space group P1 with Z = 2, a = 8.493 (1) A?, b = 11.588 (1) A?, c = 12.754 (1) A?, α = 73.763 (8)°, β = 80.384 (6)°, γ = 81.948 (8)°, and V = 1182.4 (2) A?3. The structure was refined to R = 0.027 for the 4254 observed reflections. The platinum atom shows normal square-planar geometry. The platinum-phosphinite bond distance is comparable with that found in platinum(II) phosphite complexes.
