DISTORTED TETRAHEDRAL COPPER(II) COMPLEX OF A TETRADENTATE SCHIFF-BASE LIGAND

The reaction of the ligand formed by the 2:1 molar condensation of salicylaldehyde with α, α,δ, δ-tetramethylputrescine with copper(II) results in the formation of the title compound, referred to hereafter as Cu(sal2tmput). The crystal and molecular structure has been determined using single-crystal X-ray diffraction. The crystal is of the monoclinic class, space group Cc, with [FORMULOA OMMIETD] The asymmetric unit consists of two independent Cu(sal2tmput) molecules having D2a-distorted tetrahedral symmetry. The dihedral angles defined by the phenyl moieties bound to the copper atoms of the asymmetric pair are 52.4 and 45.6°, respectively. The distortion from the normal square-planar coordination markedly influences the chemical properties of the complex. © 1979, American Chemical Society. All rights reserved.