709039-92-9Relevant academic research and scientific papers
Specifics of monodentate coordination of triazenide ligands with transition metals: The crystal structure of bis(triethylphosphine)(o-tolyl)(N,N-bis(p- fluorophenyl)triazenido)platinum(II) and -palladium(II), trans-(o-Tol)(PEt 3)2{N3(C6H4-F-p) 2} (M = Pt, Pd)
Starikova,Peregudov,Antipin,Kravtsov
, p. 1857 - 1868 (2008/10/09)
The isostructural complexes trans-(o-Tol)M(PEt3) 2{N3(C6H4-F-p)2}, where M = Pd (I) or Pt (II), have been studied by X-ray diffraction. Complex I has also been studied by dynamic NMR. The triazenide ligand has a flattened zigzag shape; its phenyl rings are rotated with respect to the central moiety through an angle of 11° and 13° in I and II, respectively. In contrast to the analogous nickel complex, the o-Tol ligand in the crystal is ordered and is orthogonal to the {MNC2} coordination plane, and the Me group has a cisoid orientation with respect to the N(2)N(1)Ph moiety. Based on available literature data and those obtained for complexes I and II, the structures of complexes containing the monodentate triazenide ligand have been surveyed. It turns out that the metal-nitrogen bond lengths are determined by the cooperative effect of the atoms forming the coordination polyhedron of the metal. The N-N bonds in coordinated and free triazenide ligands, as well as in the deprotonated Ar-N=N-N-Ar ligand, are delocalized, although one N-N bond is always shorter than the other. A more informative parameter is the NNN bond angle. For complex I, the kinetic and thermodynamic parameters of the N(3) ? N(1) σ,σ migration of the MLn group are determined. The intramolecular migration of the organometallic moiety in the (o-Tol)M(PEt 3)2N23(C6H4-F-p) 2 complexes (M = Pd, Pt, Ni) are considered.
