Abstract
Currently, new precatalysts for olefin oligomerization are being sought in the group of vanadium(IV) complexes. Thus, the aim of our research was to examine the catalytic activity of the oxovanadium(IV) dipicolinate complex [VO(dipic)(H2O)2] 2 H2O (dipic = pyridine-2,6-dicarboxylate anion) in 2-propen-1-ol oligomerization as well as to characterize oligomerization products using matrix-assisted laser desorption/ionization–time-of-flight mass spectrometry (MALDI-TOF-MS), infrared spectroscopy (IR) and nuclear magnetic resonance (NMR). The oligomerization process took place at room temperature, under atmospheric pressure and under nitrogen atmosphere to prevent oxidation of the activator MMAO-12—the modified methylaluminoxane (7 wt.%) aluminum in toluene. The last point was to determine the catalytic activity of the complex in the oligomerization reaction of 2-propen-1-ol. The aspect that enriches this work is the proposed mechanism of oligomerization of allyl alcohol based on the literature.
Highlights
Accepted: 10 January 2022When you hear “polymer”, the first thing that comes to mind is plastics
In order to confirm the structure of the synthesized crystal of complex compound, we described the infrared spectroscopy (IR) spectrum of the dipicolinate oxovanadium(IV) complex (Figure 3) [41]
The synthesized complex was used for 2-propen-1-ol oligomerization
Summary
Accepted: 10 January 2022When you hear “polymer”, the first thing that comes to mind is plastics. The synthesis of polymers requires special conditions, catalysts are used which lower the activation energy and speed up the process [17,18,19,20,21,22,23]. It has become popular to use metallocenes, e.g., complex compounds containing d-block metals and organic ligands (precatalyst) [20,21]. The combination of a precatalyst with an activator, i.e., an organoaluminum compound, e.g., methylaluminoxane (MAO) or a modified methylaluminoxane (MMAO-12, 7% aluminum in toluene) creates a Ziegler–Natta catalyst [24,25,26,27]. The sixth generation of Ziegler–Natta catalysts is the most widespread due to high catalytic activity and attempts to replace MMAO with another activator. As an activator, oxidizes very quickly when there is oxygen in the reaction system and, nitrogen is introduced to prevent this
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