Within the realm of organic synthesis, cycloaddition methodology has played a role of ever-
increasing importance. This focus is driven by the nature of the cycloaddition process, during …

The electron density determines all properties of a system of nuclei and electrons. It is both
computable and observable. Its topology allows gaining insight into the mechanisms of …

According to RH Crabtree, Metal Dihydrogen and sigma-Bond Complexes is described
asthe definitive account of twentieth-century work in the area of sigma complexation'. It …

The activation and cleavage of C–C single bonds mediated by transition metal complexes is
one of the most challenging reactions, both practically and in terms of understanding, in the …

A thorough investigation of the reactions of diynes, R (C⋮ C) 2R, and polyynes, R (C⋮ C) n
R, with titanocene and zirconocene was performed using the metallocene sources Cp2M …

Chemists have been fascinated for a long time with electron delocalization in covalently
linked molecules, and especially with the prototypical phenomenon of aromaticity. Even …

The recent synthesis of a crystalline compound containing Ti bonded to cyclopentadienyl
and a substituted dienyl fragment prompted the question of whether Ti− C contacts that were …

Abstract The [5+ 2] cycloaddition allows the synthesis of a diversity of complex highly
functionalized seven‐membered products in a single step. These cycloadducts can readily …

Agostic interactions are covalent intramolecular interactions between an electron deficient
metal and a σ-bond in close geometrical proximity to the metal atom. While the classic cases …

The agostic bond defines an intramolecular interaction where a σ bond is geometrically
close to an electron deficient centre (often a transition metal). The computational studies on …