Group 1 and 2 and Early Transition Metal Complexes Bearing N-Heterocyclic Carbene Ligands: Coordination Chemistry, Reactivity, and Applications

Copolymerization of cyclohexene oxide with CO2catalyzed by tridentate N-heterocyclic carbene titanium(iv) complexes

“…To date, few examples of mono, di and tridentate complexes based on early transition metals have been reported [101][102][103] (Scheme 1.11). Among the tridentate examples,…”

“…In addition to the unique electronic properties of NHCs, the ease of substituent´s variability at the nitrogen atom makes them suitable ligands to bind with a wide range of metals, giving them a huge potential as catalysts in organic transformations and polymerizations [101,124].…”

N-heterocyclic carbene complexes of Group 6 metals

“…In addition, the stereoelectronic properties of NHCs are easily tuneable by modifying the NHC backbone and the exocyclic nitrogen substituents [7,[21][22][23][24][25][26]. All these beneficial features have popularised the use of NHC ligands in transition metal chemistry [13,14,[27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Among the metals, Group 6 metals (Cr, Mo, W) have played a classical and central role in the development of carbene chemistry.…”

Sterically Bulky NHC Adducts of GaMe3 and InMe3 for H2 Activation and Lactide Polymerization

“…Thanks to their exceptional σ-donating properties and steric tunability, N-heterocyclic carbenes (NHCs) constitute a privileged class of supporting ligands for the stabilization of various metal complexes [1][2][3][4][5]. This has led to the widespread use of NHC-supported metal species in numerous research fields, notably in metal-based homogeneous catalysis and for the characterization of unusual organometallic motifs [6,7].…”