Crystal structure of a new zigzag chain Cu(II) complex with terephthalato and 1,10-phenonthroline ligands, [Cu(C8H4O4)(C12H8N2)(H2O)]n

Abstract

X-Ray crystal structure analysis of the complex [Cu(tpth)(phen)(H2O)]n, where tpht is the dianion of terephthalic acid and phen is 1,10-phenanthroline showed that two crystallographically different, but chemically identical tpht ions with monodentately coordinated COO groups exist; both tpht ions act as bridging ligands forming zigzag chains. The Cu(II) ions are in a deformed trigonal bipyramidal environment consisting of two N atoms from phen, two O atoms from different tpht ligands and one O atom from coordinated H2O molecule. The crystal data are as follows: C20H14CuN2O5, Mr = 425.87 triclinic system, space group P 1, a = 9.007(5), b = 10.557(5), c = 11.554(5) Å, α= 114.343(5), β = 92.942(5), γ = 114.516(5) º, V = 877.3(7) Å3, Z = 2 F(000) = 434, ρx = 1.612 g cm-3, μ = 1.281 mm-1, R1 = 0.0280 for 4363 reflections with I > 2σ(I), wR2 = 0.0785 for 5104 independent reflections and 254 refined parameters. Some of data were compared with isostructural Co(II) and Zn(II) complexes having the same ligands.

Keywords

• transition metal complexes
• copper(ii)
• terephthalate ions
• 1,10-phenanthroline
• crystal structure