A new bis-phenolate mesoionic carbene ligand for early transition metal chemistry. Issue 39 (2nd September 2019) - Baltrun, Marc
Abstract : A new chelating mesoionic carbene ligand, derived from 1, 2, 3-triazoles, with two redox-active tert -butyl-phenolate linkers has been synthesized and explored towards its reactivity and electrochemical properties in early transition metal chemistry. Abstract : We report the synthesis of a new pincer-type triazolylidene ligand precursor H3 L[Cl] with redox-active 3, 5-di- tert -butylphenolate substituents on a multigram scale following a converging ten-step route. The potential of this new mesoionic carbene ligand in early transition metal chemistry is explored. This includes the synthesis of the first triazole-derived mesoionic carbene complexes of titanium, niobium and molybdenum as well as the first example of MIC imido complexes of these elements. Furthermore, the reactivity as well as the electrochemical properties of the new complexes are compared to known, comparable bis-phenolate NHC complexes.