Síntese, caracterização e atividade catlítica em reações de hidrogenação de alcenos dos complexos de fórmula geral trans-[RuCl2(dppb)(N-N)]

Abstract

Initially, three diimine ligands were synthesized and characterized, namely: (1Z,2Z)-N1,N2-bis(2,4-dimethylphenyl)ethane-1,2-diimine (1); (1Z,2Z)-N1,N2-bis(2,6-dimethylphenyl)ethane-1,2-diimine (2); (1Z,2Z)-N1,N2-bis(2,4,6-trimethylphenyl)ethane-1,2-diimine (3) from condensation reaction between ortho- or para-substituted anilines and glyoxal. The ruthenium complexes were synthesized from substitution reactions using the complex [RuCl2(dppb)]2-μ2(-dppb) as precursor and the three previously synthesized diimine ligands. The synthesized complexes were: Trans-[RuCl2(dppb)(2,4Me-NN)] (4); Trans-[RuCl2(dppb)(2,6Me-NN)] (5); Trans-[RuCl2(dppb)(2,4,6Me-NN)] (6). The ligands and complexes were characterized using elemental analysis techniques (CHN), electron spectroscopy in the ultraviolet region (UV/vis), vibrational spectroscopy in the infrared region (IR) and nuclear magnetic resonance (NMR) of 1H,13C 31P{1H}.