CRYSTAL STRUCTURE OF TRIS(TRIPHENYLPHOSPHINE) PALLADIUM

Article abstract of DOI:10.1007/BF00749589

The authors have made an x-ray structural investigation <λMo, 5655 reflections, anisotropic (Pd, P)-isotropic (C) method of least squares to R=0.088> of the reaction product of Pd2(PPh3)2*(μ-CO)(OAc)2 with a tertiary amine, identified in the course of x-ray structural analysis as Pd(PPh3)3.The crystals are triclinic: α=11.659, β=14.803, c=15.843 Angstroem, α=109.31, β=95.17, γ=90.49 deg, ρ_calc=1.154 g/cm³, Z=2, space group PI.In the structure the coordination unit PdP3 has the form of a strongly distorted trigonal pyramid.The Pd atom is raised a little above the plane of P3 and is 0.160 Angstroem from it.The spacings of Pd-P are 2.307-2.322 Angstroem, and the values of the angles PPdP are 115.0-126.5 deg.The short intramolecular contacts Pd...H (2.82-2.03 Angstroem) to the ortho atoms of the Ph rings lie above and below the plane P3, blocking the axial positions at the Pd atoms.The results are compared with the literature data on complexes of zero-valent palladium with phosphine ligands.