Observation of the Direct Products of Migratory Insertion in Aryl Palladium Carbene Complexes and Their Subsequent Hydrolysis

Unprecedented Allenylidene Transfer from Chromium to Tungsten

“…The stoichiometric transfer of carbene ligands from chromium or tungsten pentacarbonyl carbene complexes to other metal centers such as gold, iron, nickel, cobalt, copper, rhodium, or palladium has likewise been reported. In all of these reactions free carbenes can be excluded as reaction intermediates.…”

Transfer of heterocyclic carbene ligands from chromium to gold, palladium and platinum

“…The first photochemically induced transfer of a Fischer-type carbene ligand (from molybdenum to iron and nickel) was reported by Fischer and Beck in 1970 [14]. Since then the carbene ligand in pentacarbonyl carbene complexes of chromium, molybdenum or tungsten has also thermally been transferred to other metals such as gold [15][16][17], cobalt [18], rhodium [16,17,19], palladium [16,17,20], platinum [16,17], copper [16,21] and silver [18]. Such transmetallations offer ready access to transition metal carbene complexes that cannot be prepared or are only difficult to obtain by conventional synthetic methods.…”

Carbene Transfer Reactions from Chromium(0) to Gold(I): Synthesis and Reactivity of New Fischer-Type Gold(I) Alkenyl Carbene Complexes

“…However, the transfer of a carbene ligand from a metal carbene complex to another metallic center represents an interesting concept that allows access to carbene complexes of late transition metals . Since Fischer and Beck reported the first example of a stoichiometric Fischer-type carbene ligand transfer from molybdenum to iron complexes, the carbene ligand in pentacarbonyl carbene complexes of chromium, molybdenum, and tungsten has also been transferred to other metals such as gold, − cobalt, rhodium, ,, nickel, − palladium, ,, platinum, , copper, ,, and silver . With regard to gold complexes, Au(I) bis-carbene complexes have been prepared from the reaction of tungsten diaminocarbene complexes with (Me 2 S)AuCl .…”