Manganese(III) complexes with tetradentate O^C^C^O ligands: Synthesis, characterization and catalytic studies on the CO2 cycloaddition with epoxides

A Zn-Based Coordination Polymer with Homogeneous Catalyst Properties for Efficient CO2 Fixation

“…According to the experimental results and combined with previous reports, − the mechanism of the formation of cyclic carbonate catalyzed by ZnBr 2 -CP from CO 2 with epoxide was proposed, as shown in Figure . Both Lewis acid center Zn 2+ and the proton on the imidazole ring connected first to the O atom on the epoxide, resulting in C–O bond polarization to decrease the bond energy.…”

Bis(N‐Heterocyclic Carbene) Manganese(I) Complexes in Catalytic N‐Formylation/N‐Methylation of Amines Using Carbon Dioxide and Phenylsilane

“…In recent years, several studies appeared in the literature regarding the properties of Mn complexes with Nheterocyclic carbene (NHC) ligands, [16] and also the number of reports on their application as homogeneous catalysts rapidly increased. [17,18] This is the results of the renaissance of the organometallic chemistry of Earth-abundant metals, [19][20][21] which takes advantage of the higher availability and the metal precursor's low price, the high bio-compatibility of these metals, and finally their capability of undergoing single electron transfer (SET) processes. [19] Manganese-NHC complexes have been reported in a variety of oxidation states namely Mn(0), Mn(I), Mn(II), Mn(III), Mn(IV) and Mn(V), being NHCÀ Mn(I) the most represented compounds.…”

“…In this work, we present the first example of a Mn(I)‐phosphine free catalytic system for the reductive N ‐formylation and methylation of anilines with CO 2 , using bidentate NHCs as supporting ligands. In recent years, several studies appeared in the literature regarding the properties of Mn complexes with N‐ heterocyclic carbene (NHC) ligands, [16] and also the number of reports on their application as homogeneous catalysts rapidly increased [17,18] . This is the results of the renaissance of the organometallic chemistry of Earth‐abundant metals, [19–21] which takes advantage of the higher availability and the metal precursor's low price, the high bio‐compatibility of these metals, and finally their capability of undergoing single electron transfer (SET) processes [19] .…”

Manganese(iii) complexes stabilized with N-heterocyclic carbene ligands for alcohol oxidation catalysis

“…[9][10][11]; (b) known Mn(III) complexes containing a NHC ligand (ref. [27][28][29]. † Electronic supplementary information (ESI) available: NMR and CV characterization of the Mn complexes, catalytic experiments, characterization of the purified oxidation products, crystallographic details ( pdf ).…”

“…28 This system was very recently applied also as catalyst for the cycloaddition reaction of epoxides with CO 2 . 29 A few examples of (nitrido) Mn(IV) and Mn(V) complexes with Arduengo-type NHC ligands have been isolated, [30][31][32] which undergo several redox processes without any decomposition, including one-electron reduction to the Mn(III) NHC species. The stability of these complexes may be attributed to the large steric shielding around the high-valent metal center, a configuration that also suggests limited potential for catalytic applications.…”