The present paper comprehensively reviews group 3–7 metal NHC complexes reported
since 2014, with emphasis on their current applications and fundamental reactivity. Thanks …

Transition metals form a variety of alkylidyne complexes with either a d0 metal center (high-
valent) or a non-d0 metal center (low-valent). One of the most interesting properties of …

Molybdenum alkylidynes endowed with tripodal silanolate ligands belong to the most active
and selective catalysts for alkyne metathesis known to date. This paper describes a new …

A new family of structurally well-defined molybdenum alkylidyne catalysts for alkyne
metathesis, which is distinguished by a tripodal trisilanolate ligand architecture, is …

Since the discovery of persistent carbenes by the isolation of 1, 3-di-l-adamantylimidazol-2-
ylidene by Arduengo and coworkers, we witnessed a fast growth in the design and …

The concept of metal imido and metal oxo alkylidene N-heterocyclic carbene (NHC)
catalysts for olefin metathesis is outlined. This includes the synthetic concepts for their …

A family of d2 Re (V) alkylidyne complexes bearing two decorated phosphino-phenolates
(POs) and a labile pyridine ligand were prepared that can efficiently promote alkyne …

We report in this communication the first example of catalytic alkyne metathesis reactions
mediated by well-defined non-d0 alkylidyne complexes. The air-stable d2 Re (V) alkylidyne …

Rigid terdentate 'pincer'ligands containing a bridgehead N-heterocyclic carbene (NHC)
donor attract considerable interest as spectators in transition metal complexes with broad …

The intermediacy of metallacyclobutadienes as part of a [2+ 2]/retro-[2+ 2] cycloaddition-
based mechanism is a well-established paradigm in alkyne metathesis with alternative …