Synthesis, Spectra and Crystal Structure of 2-({[3 Amino)propyl]imino}methyl)phenol Copper(II) Complex

Abstract

A copper(II) complex, [Cu(salenN3], [salenN3H2 = 2-({[3-(methyl{3-[(2-hydroxybenzylidene)amino]propyl}amino)propyl]imino} methyl)phenol] was synthesized and characterized by elemental analyses, FTIR spectra and single crystal X-ray diffraction. The complex crystallizes in the monoclinic space group P21/c with a = 6.877(3), b = 14.109(6), c = 20.106(8) Å, β = 92.231(14)°, V = 1949.5(14) Å3. The salen ligand loses two phenolic hydrogens being a dianion and coordinates to the copper(II) ion as a pentadentate ligand through its two O and three N, atoms. The copper(II) complex is five-coordinate, lying between perfect square pyramidal and trigonal-bipyramidal extremes. Use of the structural index parameter (τ) for five coordinate metal complexes indicated that the copper(II) complex exhibits a grater tendency toward trigonal-based-pyramidal geometry (τ > 0.5). The individual molecules in the crystal are held together by C-H⋯τ and H⋯H interactions. The IR and electronic spectra of the complex were discussed in detail. © 2003 Elsevier Science B.V. All rights reserved.