Chromium complexes with tridentate NN′O Schiff base ligands as catalysts for the coupling of CO2 and epoxides

Iron amino-bis(phenolate) complexes for the formation of organic carbonates from CO2 and oxiranes

“…10 Industrially, the production of cyclic carbonates requires demanding reaction conditions such as elevated CO 2 pressures and high temperatures. Therefore, numerous efforts have been devoted to the design of efficient catalysts for this transformation under mild reaction conditions, 10 including catalysts of aluminum, [11][12][13][14] chromium, [15][16][17][18] cobalt, [17][18][19][20][21][22] zinc, 23,24 manganese 25 and magnesium. 26 In order to address the potential toxicity associated with some of these metals, iron complexes have been used as a promising class of catalyst.…”

Aluminium salabza complexes for fixation of CO2 to organic carbonates

“…15 In most cases, such binary catalytic systems, Lewis acid/nucleophile, lead to an enhanced activity under milder reaction conditions. [16][17][18] Recently, there has been an increased interest in developing new catalytic systems based on earth-abundant and widely distributed metals such as aluminium and iron. Early studies by Inoue and co-workers showed the possibility of CO 2 activation using Al(III) porphyrin complexes in the presence of imidazole, quaternary ammonium or phosphonium salts.…”

Syntheses, Characterization, and Application of Tridentate Phenoxyimino-Phenoxy Aluminum Complexes for the Coupling of Terminal Epoxide with CO2: From Binary System to Single Component Catalyst

“…Usually, metal-based complexes display higher reactivity than organocatalysts for the coupling reaction. As a result of the diversity of the metal across the periodic table and the organic ligands of different structures, miscellaneous metal complexes based on aluminum , magnesium [33][34][35][36], chromium [37][38][39][40][41][42], cobalt [43][44][45][46][47][48], iron [49][50][51][52][53], and rare earth metals [54,55] have been innovated for the coupling reaction of CO 2 with epoxides. Of many metal complexes, aluminum complexes have been drawing attention due to their low price, easy availability, and the superior selectivity for the cyclic carbonate over polymeric products [56].…”