Carbenes, thought of only as transient species for a long time, have become ubiquitous in
organometallic chemistry. Their interaction with a metal center, which allows for their …

Cyclometalation refers to the transition metal-mediated activation of a CR bond to form a
metallacycle comprising a new metal-carbon σ bond (Scheme 1). 1, 2 Typically, the reaction …

In 1956 Eleuterio invoked what is now known as an olefin metathesis reaction in order to
explain how certain heterogeneous Mo catalysts could produce polyethylene from …

As an atom-efficient strategy for the large-scale interconversion of olefins, heterogeneously
catalysed olefin metathesis sees commercial applications in the petrochemical, polymer and …

A library of low-coordinate titanium and vanadium complexes containing terminal metal−
ligand multiply bonded functionalities such as alkylidenes, alkylidynes, and imides have …

The last several years have produced some key advances in the area of alkene and alkyne
metathesis by high oxidation state alkylidene and alkylidyne complexes along with new …

A 7-tungstabicyclo [4.3. 0] nonane complex forms slowly upon addition of cyclohexene to the
ethylene complex, W (NAr)(OSiPh3) 2 (C2H4), at 22° C. A single-crystal X-ray study showed …

Two important objectives in organometallic chemistry are to understand C− H bond
activation reactions mediated by transition metal compounds and then to develop efficient …

Four new Mo (NAr)(CR1R2)(OSiPh3) 2 complexes (Ar= 2, 6-i-Pr2C6H3; CR1R2= CMe2,
CMeCH2Ph, CEtPh, or CHCH2Ph) were prepared through addition of CH2═ CR1R2 to a …

This tutorial explores the major pathways of forming metal–carbon double bonds in high-
oxidation-state alkylidene complexes that began with the alkylidene chemistry of tantalum …