SYNTHESIS AND CHARACTERIZATION OF TRANSITION METAL COMPLEXES IN ETHYL ACETATE AS SOLVENT

PINILLA PEÑA, DIANA C.; VELASCO, MANUEL I.; ROSSI, LAURA I.

Carlos Paz

Conferencia; American Conference on Physical Organic Chemistry; 2015

The synthesis of coordinations compounds or complexes formed by organic molecules and metal centers is an important part of de organometallic chemistry 1. The most common function of metal complexes is catalyze reactions to obtain active principles. Noble metal complexes with specific ligands are the most used. One significant advances in catalysis is the use of the halides of transition metals iron (Fe), copper (Cu) and zinc (Zn) as catalyst 2. However, many salts are not stable to conditions of humidity and they are only applicable for one reaction cycle 3. So the synthesis of complexes between these salts and cyclodextrins (CD) gives the possibility of to bonding to improve both it catalytic activity as its stability3.In this study Ethyl acetate was used solvent for the synthesis of complexes between friendly to the environment, brominated metal salts Fe (II), Fe (III), Zn (II), Cu (II), Al (II) and Mn (II) as the ligand 4 and gamma cyclodextrin (yCD). These complexes were characterized by techniques such as IR, TGA and UV-Vis RD, showing good stability against environmental conditions. These complexes were compared to others synthesizedin in dichloromethane previously and characterized by the same techniques. In Figure 1 showed the IR spectra of the complex of -CD / FeBr2 in dichloromethane and ethyl acetate and -CD native.The complex synthesized between the metal and -CD in ethyl acetate transitions is stable, and form hydrogen bridges between diversity -CD native.