Abstract Discovered in 2005, cyclic (alkyl)(amino) carbenes (CAACs) are among the most
nucleophilic (σ donating) and also electrophilic (π‐accepting) stable carbenes known to …

Carbenes have evolved from transient laboratory curiosities to a robust, diverse, and
surprisingly impactful ligand class. A variety of different carbenes have significantly …

Although N-heterocyclic carbenes (NHCs) have been known as ligands for organometallic
complexes since the 1960s, these carbenes did not attract considerable attention until …

Conspectus Carbenes are compounds that feature a divalent carbon atom with only six
electrons in its valence shell. In the singlet state, they possess a lone pair of electrons and a …

N‐Heterocyclic carbene (NHC) organocatalysis has been developed as an important
approach in modern organic synthesis. Versatile activation modes within NHC …

Organic light-emitting diodes (OLEDs) produced from metal complexes play an important
role in modern electroluminescent devices. While OLEDs are being used in display various …

The fascinating story of olefin (or alkene) metathesis (eq 1) began almost five decades ago,
when Anderson and Merckling reported the first carbonrcarbon double-bond rearrangement …

Beginning as chemical curiosities with the pioneering work of Curtius, 1a Staudinger, 1b and
even earlier efforts, 1c carbenes have played an important role as transient intermediates …

Beyond the Tolman electronic parameter: The 31P NMR chemical shifts of easily
synthesized carbene–phenylphosphinidene adducts allow the determination of the relative …

The success of homogeneous catalysis can be attributed largely to the development of a
diverse range of ligand frameworks that have been used to tune the behavior of various …