HIDROGENACIÓN DE 3-HEXINO CATALIZADA POR UN COMPLEJO DE PALADIO (II). EFECTO DE LA TEMPERATURA DE REACCIÓN

LIPRANDI, D.; CAGNOLA, E.; QUIROGA MÓNICA; MASTALIR Á.; L'ARGENTIERE, P.

Ciudad Autónoma de Buenos Aires

Congreso; XVI Congreso Argentino de Catálisis - CAC; 2009

Comité Nacional de Catálisis CONACA

<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:ES; mso-fareast-language:ES;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> The dichlorobis(tridecylamine)palladium(II) complex, pure and supported on g-Al2O3, was used as catalyst for the semi-hydrogenation of 3-hexyne. The complex was characterized by Centesimal Composition, XPS and IR. The influence of the reacttion temperature at 275, 290 and 303 K was studied: Lindlar catalyst was used for comparative determinations. For (Z)-alkene selectivities higher than 90%, the optimum reaction conditions found for each catalyst were: I) Lindlar: 50 minutes and 303 K; II) unsupported complex: 50 minutes and 275 K; and III) supported complex: 60 minutes and 303. Under these operational conditions, the production of (Z)-3-hexene with the three catalysts presented the following order: [PdCl2(TDA)2]/g-Al2O3 > [PdCl2(TDA)2] > Lindlar. The Pd-TDA complex, supported or not, is an active and stereo selective system for the semi-hydrogenation of 3-hexyne. The results obtained indicate that the supported Pd-TDA complex is not destroyed under the reactions conditions and that there is no leaching of the complex during the catalytic evaluations. The anchored palladium complex shows higher activity and selectivity than the same complex unsupported; the different behavior between both palladium species can be attributed, at least partially, to electronic and geometrical effects.