MOLECULAR AND CRYSTAL STRUCTURE OF A STERICALLY DISTORTED COMPLEX OF Pd(II) WITH 2,9-DIMETHYL-1,10-PHENANTHROLINE [Pd(2,9-Me2-phen)Cl2]
V. N. Demidov, S. A. Simanova, A. I. Savinova, A. V. Zinchenko, T. B. Pakhomova, E. A. Aleksandrova
Keywords: Pd(II) complexes, 2,9-dimethyl-1, 10-phenanthroline, molecular and crystal structure
Pages: 309-315
Abstract
A neutral complex of palladium(II) with 2,9-dimethyl-1,10-phenanthroline [Pd(2,9-Me2-phen)Cl2] (goldish orange colored) is examined by single crystal X-ray diffraction. The crystals of [Pd(2,9-Me2-phen)Cl2] are monoclinic and belong to the space group P21/n (a = 11.8670(7) Å, b = 7.8195(5) Å, c = 14.2418(9) Å, β = 92.5450(10)°, Z = 4, V = 1320.25 Å3, R = 0.0289). The complex [Pd(2,9-Me2-phen)Cl2] exhibits a strong distortion of the usual square-planar geometry with a deviation of the central Pd2+ ion and two chloride acido-ligands from the plane of coordinated 2,9-dimethyl-1,10-phenanthroline. The lengths of two Pd-N bonds are slightly different and are 2.058 Å and 2.067 Å, the lengths of the Pd-Cl bonds are equal and are 2.285 Å. 2,9-Me2-phen itself also suffers some distortion of the planar geometry resulting in the boat conformation of the molecule. The crystal structure of the [Pd(2,9-Me2-phen)Cl2] complex is characterized by the presence of π-π stacked dimers arranged in infinite tilted stacks.
|
