Synthesis, characterization, X-ray crystallography analysis, and catalytic activity of bis(2-pyridylmethyl)amine copper complexes containing coupled pendent olefinic arms in atom transfer radical addition (ATRA) reactions

Structural Determination of an Unusual CuI -Porphyrin-π-Bond in a Hetero-Pacman Cu-Zn-Complex

The synthesis and characterization of a hetero‐dinuclear compound is presented, in which a copper(I) trishistidine type coordination unit is positioned directly above a zinc porphyrin unit. The close distance between the two coordination fragments is secured by a rigid xanthene backbone, and a unique (intramolecular) copper porphyrin‐π‐bond was determined for the first time in the molecular structure. This structural motif was further analyzed by temperature‐dependent NMR studies: In solution at room temperature the coordinative bond fluctuates, while it can be frozen at low temperatures. Preliminary reactivity studies revealed a reduced reactivity of the copper(I) moiety towards dioxygen. The results adumbrate why nature is avoiding metal porphyrin‐π‐bonds by fixing reactive metal centers in a predetermined distance to each other within multimetallic enzymatic reaction centers.

Tuning the reactivity of copper complexes supported by tridentate ligands leading to two-electron reduction of dioxygen

Dinuclear copper complex with tridentate ligand and anthracene linkage catalyses 2-electron reduction of O₂.

Direct arylation of benzoazoles with aldehydes utilizing metal–organic framework Fe3O(BDC)3 as a recyclable heterogeneous catalyst

Aryl-substituted azoles were effectively produced via the direct arylation of azoles with benzaldehydes under metal–organic framework catalysis.