Coupling Reactions of Carbon Dioxide with Epoxides Catalyzed by Vanadium Aminophenolate Complexes

Abstract

A series of vanadium compounds supported by tetradentate aminobis(phenolate) ligands were screened for catalytic reactivity in the reaction of propylene oxide (PO) with CO : [VO(OMe)(O NO )], [VO(OMe)(ON O )], [VO(OMe)(O NN )], and [VO(OMe)(O NO )]. They showed similar reactivities, but reaction rates were higher for [VO(OMe)(ON O )], which was studied in more detail. Turnover frequencies for conversion of PO over 500 h were observed. Activation energies were determined experimentally through in situ IR spectroscopy for propylene carbonate (48.2 kJ mol ), styrene carbonate (45.6 kJ mol ), and cyclohexene carbonate (54.7 kJ mol ) formation.

Chemical fixation of carbon dioxide catalyzed via cobalt (III) ONO pincer ligated complexes

“…Various kinds of catalysts, such as metal oxides 9 , molecular sieves 10 , metal-organic frameworks [11][12][13] , ion-exchange resins 14 , nanoparticles 3,15 , ionic liquids 16 , functionalized polymers 17 , biopolymer-supported catalysts 18 , and metal complexes including aluminum, 19-21 zinc 22,23 chromium 24,25 , iron 26,27 , tin 28 and vanadium, etc. [29][30][31] , have been investigated for this reaction.…”

Recent Advances in the Chemical Fixation of Carbon Dioxide: A Green Route to Carbonylated Heterocycle Synthesis

“…• under the conditions described in Table 1 entry 4, 1,3-dioxan-2-one was recovered in 67% yield at 80 °C, and 1.0 MPa CO2 pressure [47]; • with the POSS-Imi catalyst (0.067 mol%, Table 1, entry 70) but the conversion is very low (16%) albeit selectivity was almost quantitative [116].…”

Bifunctional coordination polymers as efficient catalysts for carbon dioxide conversion

“…The same catalyst in combination with TBAB the respective activation energy calculated was 23 KJ/mol which showed a significant reduction. Various catalytic systems reported in the literature are possessing activation energy in the range 35–70 KJ/mol . The highest activation energy 98.4 KJ/mol was reported for the iron amino‐bis (phenolate) complex catalyst, for the conversion of propylene oxide in combination with TBAB .…”