Síntese e caracterização de complexos organometálicos de Cu(I), Cu(II) e Ni(II) com ferroceno-triazenos e triazenido de Hg(II) com interação Metal-Areno-Pi

Abstract

This Thesis aimed the synthesis of new metal complexes with triazenido ligands and triazenes chains directly linked to ferrocene fragment by a new synthesis methodology. The complex bis-[1,3-bis(2-biphenyl)triazenido-κN1]mercury(II) was synthesized, melting point 222–224 °C and yield 82 %, characterized by IR, UV-Vis, 1H e 13C RMN, elemental analysis, mass spectrometry by ESI(+)TOF, single crystal x-ray diffraction. The triazenes 1,1’-bis[1-phenyl-3(H)triazene]ferrocene (Compound 1) and 1,1’-bis(benzo-1,2,3-triazol-1-phenyltriazene)ferrocene (Compound 6) were synthesized by ferrocene metalation with BuLi and substitution by correspondent azide, with yields higher than 70 %, melting points 151 and 160 °C, respectively, were characterized by UV-Vis (Compound 1), 1H and 13C NMR, elemental analysis, IE-MS (Compound 1) ESI(+)TOF (Compound 6), single crystal x-ray diffraction (Compoound 1), powder x-ray diffraction, scanning electron microscopy (SEM) and thermogravimetric analysis. Starting from Compound 1 the following heterobimetallic complexes were sinthesized: {[Fe(C5H4NNNH5C6)]2Ni2} (Compound 2), {[Fe(C5H4NNN(H)H5C6)]2Cl2Cu2} (Compound 3 with protonated triazene), {[Fe(C5H4NNNH5C6)]2[Cu(PPh3)2]2} (Compound 4), {[Fe(C5H4NNN(H)H5C6)]2Cu4} (Compound 5). Compounds 6 and 7 didn’t yields suitable single crystals for X-ray diffraction, but based on the MS-ESI(+)TOF and 1H NMR analysis the respective structures based on 1,1’-bis[1-phenyl-3(H)triazene]ferrocene could be predicted. The new triazenes synthesis by methodology under study showed good yields and can be done in two steps. The compounds purification is simple by only extraction with organic solvent and water precipitation followed by filtration enabling the development of further new triazenes including other metallocenes and other azides.