M. Kwiatkowski, E. Kwiatkowski, A. Olechnowicz
Nov 15, 1992
Citations
0
Influential Citations
8
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract The condensation of one primary amino group of the appropriate triamine: bis(2-aminoethyl)-amine (DET), bis(3-aminopropyl)-amine (DPT) or bis(3-aminopropyl)-methylamine (MeDPT), with the appropriate aldehyde: pyridine-2-carboxaldehyde (pya), 3-formylisoquinoline (iqa) or 2-aminobenzaldehyde (aba), has yielded six new quadridentate N4-type ligands: pyaDET, pyaDPT, pyaMeDPT, iqaMeDPT, abaDET and abaDPT. The ligands have been isolated as corresponding copper (II) complexes of the general formula [CuLI]I or [CuLI]I·MeOH. The crystal structures of [Cu(pyaDPT)I]I·MeOH, [Cu(pyaMeDPT)I]I·MeOH and [Cu(iqaMeDPT)I]I complexes have been determined by single crystal X-ray diffraction techniques. The geometry around the copper center is intermediate between idealized square-pyramidal and trigonal-bipyramidal symmetry, with the trigonality increasing on going from [Cu(pyaDPT)I]I·MeOH to [Cu(iqaMeDPT)I]I. Crystallographic data: [Cu(pyaDPT)I]I·MeOH: triclinic, P1, a=8.398(3), b=9.503(3), c=12.191(5) A, α=86.96(3), β=85.68(3), γ=78.73(3)°, R=0.076; [Cu(pyaMeDPT)I]I·MeOH: monoclinic, P21/c, a=9.670(4), b=12.351(6), c=17.074(5) A, β=95.60(3)°, R=0.058; [Cu(iqaMeDPT)I]I: monoclinic, P21//n, a=11.210(3), b=10.920(4), c=17.323(5) A, β=96.11(2)°, R=0.045.