Organonickel complexes acylation

Acylation with Alkybrhoddum(l) Complexes and Acid Chlorides 1.1332 Acylation by Organonickel Complexes... 

Migratory insertion reactions allow the generation of different kinds of Ni-G bonds. GO insertion is a classic example that has received much attention due to its involvement in catalytic and stoichiometric G-G bond formation processes.Although the carbonylation of cr-organonickel complexes is often followed by reductive elimination processes, many stable Ni-acyl complexes have been isolated. Recent examples of such reactions are shown in Equations (68) and (69). " Their formation is usually reversible, as demonstrated by the equilibrium shown in Equation (70), which indicates that the insertion of GO into Ni-aryl bonds is thermodynamically favored over the insertion into Ni-alkyl bonds. Acyl complexes containing Bp or Tp ligands have been prepared by carbonylation of the corresponding alkyl or aryl precursors. The ready carbonylation of the Tp derivative 137 (Equation (71))... 

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