Síntese e cristaloquímica de complexos de Hg(II) e Ni(II) com o ligante 3-(2-fluorofenil)-1-(4-acetilfenil)triazenido e atividade biológica de triazenos livres

Abstract

In this dissertation were synthesized six compounds, of the which four are free triazene ligands and two are triazenido complex of Hg(II) and Ni(II). The compouns were characterized by melting point, infrared an UV/VIS spectroscopy, ray-X diffraction in single crystals. They were also made analyses of biological activity of the free ligands, where the potential bacteriostatic and bactericidal and of DNA cleavage plasmidial was tested. The compound 1 crystallizes in the triclinic crystal system, space group P(-1), with cell parameters a = 8,033(4) Å, b = 8,039(5) Å, c = 10,022(6) Å, α = 93,77(2)°, β = 96,86(2)°, γ = 97,98(2)°; Z=2; The final crystal structure refinement converged to the indices of disagreement R1 = 0,0741, wR2 = 0,2547. In the solid state compond 1 reveals one-dimensional infinite chains with the base vector [100] as result of intermolecular N−H···O classic hydrogen bonds. The compound 5 crystallizes in the monoclinic crystal system, space group C2/c, with cell parameters a = 21,455(5) Å, b = 5,538(10) Å, c = 23,228(10) Å, α =γ = 90°, β = 116,301(10)°; Z=4; The final crystal structure refinement converged to the indices of disagreement R1 = 0,0220, wR2 = 0,0799. The crystal structure of 5 reveals one-dimensional infinite chains along the [010] direction through Hg−η2, η2−arene π−interactions. These one-dimensional chains can be extended to the bi-dimensional (2D) through no-classic hydrogen interactions C - H···O along the crystallographic vector [100]. The compound 6 crystallizes in the ortorrombic crystal system, space group Pbcn. with cell parameters a = 16,3394(11) Å, b = 11,9953(8) Å, c = 17,6042(12) Å, α=β=γ=90°; Z=4; The final crystal structure refinement converged to the indices of disagreement R1 = 0,0466, wR2 = 0,0948. The mononuclear complex with Ni(II) showing a rhombic distorted coordination geometry. In the solid state complex 6 reveals one-dimensional infinite chains with the base vector [010] as result of intermolecular C−H···O no classic hydrogen bonds. The biological activity results show that for compound 3 a bacteriostatic action for the Micrococcus spp, Rhodococcus spp e Staphylococcus saprophyticus in the concentration 128 μg/mL. The compound 4 show bacteriostatic action only for the cell lines ATCC Staphylococcus aureus in the concentration 128 μg/mL. The compounds 2 e 4 didn't show effectiveness for cleavage of the plasmid of DNA.