Structural Study of the Powder Complex of Cu(II)-1, 10-Phenanthroline-Trifluoroacetate

The powder complex containing Cu(II), 1,10-phenanthroline (phen) and trifluoroacetate (TFA) has been obtained by single direct interaction of the corresponding precursors. The chemical formula of [Cu(phen)(2) (H2O)(2)](TFA)(2)center dot 2H(2)O, diaquabis(phenanthroline) copper(II) trifluoroacetate dihydrate, has been proposed based on the TGA-DTA and the equivalent electrical conductance which was found in the range of 3 ions per molecule. The corresponding magnetic moment (mu(eff)), 1.77-181 BM, supports that it is normal paramagnetic corresponding to spin-only value for an unpaired electron in the electronic configuration of Cu(II). UV-Vis spectrum of the complex reveals the only one broad absorption observed at about 681.50 nm (14673.51 cm(-1)), being associated with the spin allowed transition, E-2(g) -> T-2(2g). The infrared spectrum shows absorptions of ligand group which is influenced by the metal-ligand interaction in this complex. The powder XRD of this complex was refined by Le Bail method of Rietica program and found to be fit as triclinic symmetry of space group P1 with the cell parameters of a = 10.8985A; b = 41.0532A; c = 16.1082A; alpha = 98.2720(0); beta = 91.9544(0);. gamma = 82.4071(0); V = 7068.8295A(3); Z = 1; with figure of merit: R-p = 1.83; R-wp = 5.70; R-exp = 0.37; Bragg R-Factor = 0.03; and GOF = 231.4.