Influence of the Reaction Temperature on the 3-Hexyne Semi-Hydrogenation Catalyzed by a Palladium(II) Complex

Abstract

The dichlorobis (tridecylamine) palladium(II) complex, pure and supported on c-Al 2 O 3 , 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 temperature was studied. The supported Pd complex resulted an active and stereo selective system for the production of (Z)-3-hexene.

RETRACTED: Transient Operation: A Catalytic Chemoselective Hydrogenation of 2-Methyl-3-Butyn-2-ol via a Cooperative Pd and Radiofrequency Heating Directed Kinetic Resolution

“…Reactions of a similar nature that would benefit from dynamic conditions would be the selective hydrogenation of 2-hexyne to cis-2-hexene as well as the conversion of cinnamaldehyde to hydrocinnamaldehyde and cinnamyl alcohol, which are valuable intermediates used in the perfumery and pharmaceutical industries [18,19]. The hydrogenation of furfural is another complex sequence of reactions involving both series and parallel pathways that would be of interest for dynamic operation for producing value-added chemicals especially due to its biomass-derived origins [20].…”

Terminal and Non Terminal Alkynes Partial Hydrogenation Catalyzed by Some d8 Transition Metal Complexes in Homogeneous and Heterogeneous Systems

“…[PdCl2(TDA)2] can be considered as the trans-isomer because of the presence of single peaks, which obey the principle of mutual exclusion, typical of centre-symmetric species [54]. .…”

“…IR spectrum below 600 cm -1 for pure [PdCl2(TDA)2]. [54] At [56] can be used to predict the HOMO-LUMO frontier orbitals in an increasing order of energy for each case:…”

“…Figure 6 in the zone where the three systems present the most remarkable differences). [54] 3-hexyne/Rh = 8.1 10 3 . To reinforce the conclusions given in the previous paragraphs, some relevant conversion and selectivity values for diverse reaction conditions are summarized in Table 5.…”

Activity and sulfur resistance of Rh(I) and Pd(II) complexes

“…In previous publications of our group different types of metal complexes with different ligands were synthesized and they were found to be active, selective and sulfur resistant in the reaction of selective hydrogenation of double and triple bonds. [6][7][8] The objectives of this work are: evaluate the catalytic activity of a palladium and a rhodium complex as low loaded heterogeneous catalysts without any pre-treatment for the selective hydrogenation of styrene to ethylbenzene; study the resistance of these complexes to tetrahydrothiophene (THT) poisoning.…”