Since the discovery of the first stable N-heterocyclic carbene (NHC) in the beginning of the
1990s, these divalent carbon species have become a common and available class of …

Discovered as organometallic curiosities in the 1970s, carbene radicals have become a
staple in modern-day homogeneous catalysis. Carbene radicals exhibit nucleophilic radical …

Shortly after their discovery at the end of the 80s, stable singlet carbenes have been
recognized as excellent ligands for transition metal based catalysts, and as organo-catalysts …

N-Heterocyclic carbenes (NHCs) are omnipresent ligands in coordination and
organometallic chemistry, which is reflected by myriads of applications involving NHC …

Conspectus N-Heterocyclic carbenes (NHCs) are known to stabilize some metal atoms in
different oxidation states mostly by their strong σ-donation. After the successful syntheses of …

The discovery in 1900 by Gomberg that the trityl radical (Ph3C·) exists at room temperature
is often considered to be the beginning of radical chemistry. Since then, persistent and even …

Reduction of xanthates by N-heterocyclic carbene boranes (NHC-boranes) has been
suggested to occur by a radical chain mechanism involving heretofore unknown NHC-boryl …

In this Forum contribution, we highlight the radical-type reactivities of one-electron-reduced
Fischer-type carbenes. Carbene complexes of group 6 transition metals (Cr, Mo, and W) can …

One-electron oxidation of a readily available phosphaalkene derived from a cyclic
(alkyl)(amino) carbene affords a phosphorus-centered radical cation that is indefinitely …

New redox systems with three oxidation states are highly sought-after, for example, for redox-
flow battery applications, selective reducing agents, or organic electronics. Herein, we …